[Keyboard] Add nt660 PCB (#9042)

* Upload nt660 files

* Apply suggestions from code review

* Apply suggestions from code review

11 files changed, 781 insertions, 0 deletions

diff --git a/keyboards/maartenwut/nt660/config.h b/keyboards/maartenwut/nt660/config.h
new file mode 100644
index 0000000000..84e93b4f04
--- /dev/null
+++ b/keyboards/maartenwut/nt660/config.h
@@ -0,0 +1,256 @@
+/*
+Copyright 2020 Maarten Dekkers <maartenwut@gmail.com>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#pragma once
+
+#include "config_common.h"
+
+/* USB Device descriptor parameter */
+#define VENDOR_ID       0x4705
+#define PRODUCT_ID      0x1F02
+#define DEVICE_VER      0x0001
+#define MANUFACTURER    Maartenwut
+#define PRODUCT         nt660
+#define DESCRIPTION     Replacement PCB for Leopold FC660M
+
+/* key matrix size */
+#define MATRIX_ROWS 5
+#define MATRIX_COLS 15
+
+/*
+ * Keyboard Matrix Assignments
+ *
+ * Change this to how you wired your keyboard
+ * COLS: AVR pins used for columns, left to right
+ * ROWS: AVR pins used for rows, top to bottom
+ * DIODE_DIRECTION: COL2ROW = COL = Anode (+), ROW = Cathode (-, marked on diode)
+ *                  ROW2COL = ROW = Anode (+), COL = Cathode (-, marked on diode)
+ *
+ */
+#define MATRIX_ROW_PINS {B7,E6,F6,F7,C7}
+#define MATRIX_COL_PINS {D6,D7,B4,B5,B6,C6,B0,B1,B2,B3,F0,F1,F4,F5,D4}
+#define UNUSED_PINS
+
+/* COL2ROW or ROW2COL */
+#define DIODE_DIRECTION COL2ROW
+
+
+/*
+ * Split Keyboard specific options, make sure you have 'SPLIT_KEYBOARD = yes' in your rules.mk, and define SOFT_SERIAL_PIN.
+ */
+// #define SOFT_SERIAL_PIN D0  // or D1, D2, D3, E6
+
+// #define BACKLIGHT_PIN B7
+// #define BACKLIGHT_BREATHING
+// #define BACKLIGHT_LEVELS 3
+
+// #define RGB_DI_PIN E2
+// #ifdef RGB_DI_PIN
+//   #define RGBLED_NUM 16
+//   #define RGBLIGHT_HUE_STEP 8
+//   #define RGBLIGHT_SAT_STEP 8
+//   #define RGBLIGHT_VAL_STEP 8
+//   #define RGBLIGHT_LIMIT_VAL 255 /* The maximum brightness level */
+//   #define RGBLIGHT_SLEEP  /* If defined, the RGB lighting will be switched off when the host goes to sleep */
+// /*== all animations enable ==*/
+//   #define RGBLIGHT_ANIMATIONS
+// /*== or choose animations ==*/
+//   #define RGBLIGHT_EFFECT_BREATHING
+//   #define RGBLIGHT_EFFECT_RAINBOW_MOOD
+//   #define RGBLIGHT_EFFECT_RAINBOW_SWIRL
+//   #define RGBLIGHT_EFFECT_SNAKE
+//   #define RGBLIGHT_EFFECT_KNIGHT
+//   #define RGBLIGHT_EFFECT_CHRISTMAS
+//   #define RGBLIGHT_EFFECT_STATIC_GRADIENT
+//   #define RGBLIGHT_EFFECT_RGB_TEST
+//   #define RGBLIGHT_EFFECT_ALTERNATING
+// /*== customize breathing effect ==*/
+//   /*==== (DEFAULT) use fixed table instead of exp() and sin() ====*/
+//   #define RGBLIGHT_BREATHE_TABLE_SIZE 256      // 256(default) or 128 or 64
+//   /*==== use exp() and sin() ====*/
+//   #define RGBLIGHT_EFFECT_BREATHE_CENTER 1.85  // 1 to 2.7
+//   #define RGBLIGHT_EFFECT_BREATHE_MAX    255   // 0 to 255
+// #endif
+
+/* Debounce reduces chatter (unintended double-presses) - set 0 if debouncing is not needed */
+#define DEBOUNCE 5
+
+/* define if matrix has ghost (lacks anti-ghosting diodes) */
+//#define MATRIX_HAS_GHOST
+
+/* Mechanical locking support. Use KC_LCAP, KC_LNUM or KC_LSCR instead in keymap */
+#define LOCKING_SUPPORT_ENABLE
+/* Locking resynchronize hack */
+#define LOCKING_RESYNC_ENABLE
+
+/* If defined, GRAVE_ESC will always act as ESC when CTRL is held.
+ * This is userful for the Windows task manager shortcut (ctrl+shift+esc).
+ */
+// #define GRAVE_ESC_CTRL_OVERRIDE
+
+/*
+ * Force NKRO
+ *
+ * Force NKRO (nKey Rollover) to be enabled by default, regardless of the saved
+ * state in the bootmagic EEPROM settings. (Note that NKRO must be enabled in the
+ * makefile for this to work.)
+ *
+ * If forced on, NKRO can be disabled via magic key (default = LShift+RShift+N)
+ * until the next keyboard reset.
+ *
+ * NKRO may prevent your keystrokes from being detected in the BIOS, but it is
+ * fully operational during normal computer usage.
+ *
+ * For a less heavy-handed approach, enable NKRO via magic key (LShift+RShift+N)
+ * or via bootmagic (hold SPACE+N while plugging in the keyboard). Once set by
+ * bootmagic, NKRO mode will always be enabled until it is toggled again during a
+ * power-up.
+ *
+ */
+//#define FORCE_NKRO
+
+/*
+ * Magic Key Options
+ *
+ * Magic keys are hotkey commands that allow control over firmware functions of
+ * the keyboard. They are best used in combination with the HID Listen program,
+ * found here: https://www.pjrc.com/teensy/hid_listen.html
+ *
+ * The options below allow the magic key functionality to be changed. This is
+ * useful if your keyboard/keypad is missing keys and you want magic key support.
+ *
+ */
+
+/* key combination for magic key command */
+/* defined by default; to change, uncomment and set to the combination you want */
+// #define IS_COMMAND() (get_mods() == MOD_MASK_SHIFT)
+
+/* control how magic key switches layers */
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_FKEYS  true
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_NKEYS  true
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_CUSTOM false
+
+/* override magic key keymap */
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_FKEYS
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_NKEYS
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_CUSTOM
+//#define MAGIC_KEY_HELP           H
+//#define MAGIC_KEY_HELP_ALT       SLASH
+//#define MAGIC_KEY_DEBUG          D
+//#define MAGIC_KEY_DEBUG_MATRIX   X
+//#define MAGIC_KEY_DEBUG_KBD      K
+//#define MAGIC_KEY_DEBUG_MOUSE    M
+//#define MAGIC_KEY_VERSION        V
+//#define MAGIC_KEY_STATUS         S
+//#define MAGIC_KEY_CONSOLE        C
+//#define MAGIC_KEY_LAYER0         0
+//#define MAGIC_KEY_LAYER0_ALT     GRAVE
+//#define MAGIC_KEY_LAYER1         1
+//#define MAGIC_KEY_LAYER2         2
+//#define MAGIC_KEY_LAYER3         3
+//#define MAGIC_KEY_LAYER4         4
+//#define MAGIC_KEY_LAYER5         5
+//#define MAGIC_KEY_LAYER6         6
+//#define MAGIC_KEY_LAYER7         7
+//#define MAGIC_KEY_LAYER8         8
+//#define MAGIC_KEY_LAYER9         9
+//#define MAGIC_KEY_BOOTLOADER     B
+//#define MAGIC_KEY_BOOTLOADER_ALT ESC
+//#define MAGIC_KEY_LOCK           CAPS
+//#define MAGIC_KEY_EEPROM         E
+//#define MAGIC_KEY_EEPROM_CLEAR   BSPACE
+//#define MAGIC_KEY_NKRO           N
+//#define MAGIC_KEY_SLEEP_LED      Z
+
+/*
+ * Feature disable options
+ *  These options are also useful to firmware size reduction.
+ */
+
+/* disable debug print */
+//#define NO_DEBUG
+
+/* disable print */
+//#define NO_PRINT
+
+/* disable action features */
+//#define NO_ACTION_LAYER
+//#define NO_ACTION_TAPPING
+//#define NO_ACTION_ONESHOT
+
+/* disable these deprecated features by default */
+#define NO_ACTION_MACRO
+#define NO_ACTION_FUNCTION
+
+/*
+ * MIDI options
+ */
+
+/* Prevent use of disabled MIDI features in the keymap */
+//#define MIDI_ENABLE_STRICT 1
+
+/* enable basic MIDI features:
+   - MIDI notes can be sent when in Music mode is on
+*/
+//#define MIDI_BASIC
+
+/* enable advanced MIDI features:
+   - MIDI notes can be added to the keymap
+   - Octave shift and transpose
+   - Virtual sustain, portamento, and modulation wheel
+   - etc.
+*/
+//#define MIDI_ADVANCED
+
+/* override number of MIDI tone keycodes (each octave adds 12 keycodes and allocates 12 bytes) */
+//#define MIDI_TONE_KEYCODE_OCTAVES 1
+
+/*
+ * HD44780 LCD Display Configuration
+ */
+/*
+#define LCD_LINES           2     //< number of visible lines of the display
+#define LCD_DISP_LENGTH    16     //< visibles characters per line of the display
+
+#define LCD_IO_MODE      1            //< 0: memory mapped mode, 1: IO port mode
+
+#if LCD_IO_MODE
+#define LCD_PORT         PORTB        //< port for the LCD lines
+#define LCD_DATA0_PORT   LCD_PORT     //< port for 4bit data bit 0
+#define LCD_DATA1_PORT   LCD_PORT     //< port for 4bit data bit 1
+#define LCD_DATA2_PORT   LCD_PORT     //< port for 4bit data bit 2
+#define LCD_DATA3_PORT   LCD_PORT     //< port for 4bit data bit 3
+#define LCD_DATA0_PIN    4            //< pin for 4bit data bit 0
+#define LCD_DATA1_PIN    5            //< pin for 4bit data bit 1
+#define LCD_DATA2_PIN    6            //< pin for 4bit data bit 2
+#define LCD_DATA3_PIN    7            //< pin for 4bit data bit 3
+#define LCD_RS_PORT      LCD_PORT     //< port for RS line
+#define LCD_RS_PIN       3            //< pin  for RS line
+#define LCD_RW_PORT      LCD_PORT     //< port for RW line
+#define LCD_RW_PIN       2            //< pin  for RW line
+#define LCD_E_PORT       LCD_PORT     //< port for Enable line
+#define LCD_E_PIN        1            //< pin  for Enable line
+#endif
+*/
+
+/* Bootmagic Lite key configuration */
+// #define BOOTMAGIC_LITE_ROW 0
+// #define BOOTMAGIC_LITE_COLUMN 0
+
+#define QMK_ESC_OUTPUT D6 // usually COL
+#define QMK_ESC_INPUT B7 // usually ROW
+#define QMK_LED D0
diff --git a/keyboards/maartenwut/nt660/info.json b/keyboards/maartenwut/nt660/info.json
new file mode 100644
index 0000000000..4b2b619698
--- /dev/null
+++ b/keyboards/maartenwut/nt660/info.json
@@ -0,0 +1,234 @@
+{
+    "keyboard_name": "nt660", 
+    "url": "", 
+    "maintainer": "maartenwut", 
+    "width": 16.5, 
+    "height": 5, 
+    "layouts": {
+        "LAYOUT_all": {
+            "layout": [
+                {"label":"k00", "x":0, "y":0},
+                {"label":"k01", "x":1, "y":0},
+                {"label":"k02", "x":2, "y":0},
+                {"label":"k03", "x":3, "y":0},
+                {"label":"k04", "x":4, "y":0},
+                {"label":"k05", "x":5, "y":0},
+                {"label":"k06", "x":6, "y":0},
+                {"label":"k07", "x":7, "y":0},
+                {"label":"k08", "x":8, "y":0},
+                {"label":"k09", "x":9, "y":0},
+                {"label":"k0a", "x":10, "y":0},
+                {"label":"k0b", "x":11, "y":0},
+                {"label":"k0c", "x":12, "y":0},
+                {"label":"k0f", "x":13, "y":0, "w":2},
+                {"label":"k0d", "x":15.5, "y":0},
+
+                {"label":"k10", "x":0, "y":1, "w":1.5},
+                {"label":"k11", "x":1.5, "y":1},
+                {"label":"k12", "x":2.5, "y":1},
+                {"label":"k13", "x":3.5, "y":1},
+                {"label":"k14", "x":4.5, "y":1},
+                {"label":"k15", "x":5.5, "y":1},
+                {"label":"k16", "x":6.5, "y":1},
+                {"label":"k17", "x":7.5, "y":1},
+                {"label":"k18", "x":8.5, "y":1},
+                {"label":"k19", "x":9.5, "y":1},
+                {"label":"k1a", "x":10.5, "y":1},
+                {"label":"k1b", "x":11.5, "y":1},
+                {"label":"k1c", "x":12.5, "y":1},
+                {"label":"k1f", "x":13.5, "y":1, "w":1.5},
+                {"label":"k1d", "x":15.5, "y":1},
+
+                {"label":"k20", "x":0, "y":2, "w":1.75},
+                {"label":"k21", "x":1.75, "y":2},
+                {"label":"k22", "x":2.75, "y":2},
+                {"label":"k23", "x":3.75, "y":2},
+                {"label":"k24", "x":4.75, "y":2},
+                {"label":"k25", "x":5.75, "y":2},
+                {"label":"k26", "x":6.75, "y":2},
+                {"label":"k27", "x":7.75, "y":2},
+                {"label":"k28", "x":8.75, "y":2},
+                {"label":"k29", "x":9.75, "y":2},
+                {"label":"k2a", "x":10.75, "y":2},
+                {"label":"k2b", "x":11.75, "y":2},
+                {"label":"k2c", "x":12.75, "y":2},
+                {"label":"k2f", "x":13.75, "y":2, "w":1.25},
+
+                {"label":"k30", "x":0, "y":3, "w":1.25},
+                {"label":"k31", "x":1.25, "y":3},
+                {"label":"k32", "x":2.25, "y":3},
+                {"label":"k33", "x":3.25, "y":3},
+                {"label":"k34", "x":4.25, "y":3},
+                {"label":"k35", "x":5.25, "y":3},
+                {"label":"k36", "x":6.25, "y":3},
+                {"label":"k37", "x":7.25, "y":3},
+                {"label":"k38", "x":8.25, "y":3},
+                {"label":"k39", "x":9.25, "y":3},
+                {"label":"k3a", "x":10.25, "y":3},
+                {"label":"k3b", "x":11.25, "y":3},
+                {"label":"k3c", "x":12.25, "y":3, "w":2.25},
+                {"label":"k3f", "x":14.5, "y":3},
+
+                {"label":"k40", "x":0, "y":4, "w":1.25},
+                {"label":"k41", "x":1.25, "y":4},
+                {"label":"k42", "x":2.25, "y":4, "w":1.25},
+                {"label":"k46", "x":3.5, "y":4, "w":6.25},
+                {"label":"k49", "x":9.75, "y":4, "w":1.25},
+                {"label":"k4a", "x":11, "y":4, "w":1.25},
+                {"label":"k4b", "x":12.25, "y":4, "w":1.25},
+                {"label":"k4c", "x":13.5, "y":4},
+                {"label":"k4f", "x":14.5, "y":4},
+                {"label":"k4d", "x":15.5, "y":4}
+            ]
+        },
+        "LAYOUT_66_ansi": {
+            "layout": [
+                {"label":"Esc", "x":0, "y":0},
+                {"label":"!", "x":1, "y":0},
+                {"label":"@", "x":2, "y":0},
+                {"label":"#", "x":3, "y":0},
+                {"label":"$", "x":4, "y":0},
+                {"label":"%", "x":5, "y":0},
+                {"label":"^", "x":6, "y":0},
+                {"label":"&", "x":7, "y":0},
+                {"label":"*", "x":8, "y":0},
+                {"label":"(", "x":9, "y":0},
+                {"label":")", "x":10, "y":0},
+                {"label":"_", "x":11, "y":0},
+                {"label":"+", "x":12, "y":0},
+                {"label":"Backspace", "x":13, "y":0, "w":2},
+                {"label":"Insert", "x":15.5, "y":0},
+                
+                {"label":"Tab", "x":0, "y":1, "w":1.5},
+                {"label":"Q", "x":1.5, "y":1},
+                {"label":"W", "x":2.5, "y":1},
+                {"label":"E", "x":3.5, "y":1},
+                {"label":"R", "x":4.5, "y":1},
+                {"label":"T", "x":5.5, "y":1},
+                {"label":"Y", "x":6.5, "y":1},
+                {"label":"U", "x":7.5, "y":1},
+                {"label":"I", "x":8.5, "y":1},
+                {"label":"O", "x":9.5, "y":1},
+                {"label":"P", "x":10.5, "y":1},
+                {"label":"{", "x":11.5, "y":1},
+                {"label":"}", "x":12.5, "y":1},
+                {"label":"|", "x":13.5, "y":1, "w":1.5},
+                {"label":"Delete", "x":15.5, "y":1},
+                
+                {"label":"Caps Lock", "x":0, "y":2, "w":1.75},
+                {"label":"A", "x":1.75, "y":2},
+                {"label":"S", "x":2.75, "y":2},
+                {"label":"D", "x":3.75, "y":2},
+                {"label":"F", "x":4.75, "y":2},
+                {"label":"G", "x":5.75, "y":2},
+                {"label":"H", "x":6.75, "y":2},
+                {"label":"J", "x":7.75, "y":2},
+                {"label":"K", "x":8.75, "y":2},
+                {"label":"L", "x":9.75, "y":2},
+                {"label":":", "x":10.75, "y":2},
+                {"label":"\"", "x":11.75, "y":2},
+                {"label":"Enter", "x":12.75, "y":2, "w":2.25},
+                
+                {"label":"Shift", "x":0, "y":3, "w":2.25},
+                {"label":"Z", "x":2.25, "y":3},
+                {"label":"X", "x":3.25, "y":3},
+                {"label":"C", "x":4.25, "y":3},
+                {"label":"V", "x":5.25, "y":3},
+                {"label":"B", "x":6.25, "y":3},
+                {"label":"N", "x":7.25, "y":3},
+                {"label":"M", "x":8.25, "y":3},
+                {"label":"<", "x":9.25, "y":3},
+                {"label":">", "x":10.25, "y":3},
+                {"label":"?", "x":11.25, "y":3},
+                {"label":"Shift", "x":12.25, "y":3, "w":2.25},
+                {"label":"\u2191", "x":14.5, "y":3},
+                
+                {"label":"Ctrl", "x":0, "y":4, "w":1.25},
+                {"label":"Win", "x":1.25, "y":4},
+                {"label":"Alt", "x":2.25, "y":4, "w":1.25},
+                {"x":3.5, "y":4, "w":6.25},
+                {"label":"Alt", "x":9.75, "y":4, "w":1.25},
+                {"label":"Win", "x":11, "y":4, "w":1.25},
+                {"label":"Menu", "x":12.25, "y":4, "w":1.25},
+                {"label":"\u2190", "x":13.5, "y":4},
+                {"label":"\u2193", "x":14.5, "y":4},
+                {"label":"\u2192", "x":15.5, "y":4}
+            ]
+        },
+        "LAYOUT_66_iso": {
+            "layout": [
+                {"label":"Esc", "x":0, "y":0},
+                {"label":"!", "x":1, "y":0},
+                {"label":"@", "x":2, "y":0},
+                {"label":"#", "x":3, "y":0},
+                {"label":"$", "x":4, "y":0},
+                {"label":"%", "x":5, "y":0},
+                {"label":"^", "x":6, "y":0},
+                {"label":"&", "x":7, "y":0},
+                {"label":"*", "x":8, "y":0},
+                {"label":"(", "x":9, "y":0},
+                {"label":")", "x":10, "y":0},
+                {"label":"_", "x":11, "y":0},
+                {"label":"+", "x":12, "y":0},
+                {"label":"Backspace", "x":13, "y":0, "w":2},
+                {"label":"Insert", "x":15.5, "y":0},
+                
+                {"label":"Tab", "x":0, "y":1, "w":1.5},
+                {"label":"Q", "x":1.5, "y":1},
+                {"label":"W", "x":2.5, "y":1},
+                {"label":"E", "x":3.5, "y":1},
+                {"label":"R", "x":4.5, "y":1},
+                {"label":"T", "x":5.5, "y":1},
+                {"label":"Y", "x":6.5, "y":1},
+                {"label":"U", "x":7.5, "y":1},
+                {"label":"I", "x":8.5, "y":1},
+                {"label":"O", "x":9.5, "y":1},
+                {"label":"P", "x":10.5, "y":1},
+                {"label":"{", "x":11.5, "y":1},
+                {"label":"}", "x":12.5, "y":1},
+                {"label":"Delete", "x":15.5, "y":1},
+                
+                {"label":"Caps Lock", "x":0, "y":2, "w":1.75},
+                {"label":"A", "x":1.75, "y":2},
+                {"label":"S", "x":2.75, "y":2},
+                {"label":"D", "x":3.75, "y":2},
+                {"label":"F", "x":4.75, "y":2},
+                {"label":"G", "x":5.75, "y":2},
+                {"label":"H", "x":6.75, "y":2},
+                {"label":"J", "x":7.75, "y":2},
+                {"label":"K", "x":8.75, "y":2},
+                {"label":"L", "x":9.75, "y":2},
+                {"label":":", "x":10.75, "y":2},
+                {"label":"\"", "x":11.75, "y":2},
+                {"label":"|", "x":12.75, "y":2},
+                {"label":"Enter", "x":13.75, "y":1, "w":1.25, "h":2},
+                
+                {"label":"Shift", "x":0, "y":3, "w":1.25},
+                {"label":"NUBS", "x":1.25, "y":3},
+                {"label":"Z", "x":2.25, "y":3},
+                {"label":"X", "x":3.25, "y":3},
+                {"label":"C", "x":4.25, "y":3},
+                {"label":"V", "x":5.25, "y":3},
+                {"label":"B", "x":6.25, "y":3},
+                {"label":"N", "x":7.25, "y":3},
+                {"label":"M", "x":8.25, "y":3},
+                {"label":"<", "x":9.25, "y":3},
+                {"label":">", "x":10.25, "y":3},
+                {"label":"?", "x":11.25, "y":3},
+                {"label":"Shift", "x":12.25, "y":3, "w":2.25},
+                {"label":"\u2191", "x":14.5, "y":3},
+                
+                {"label":"Ctrl", "x":0, "y":4, "w":1.25},
+                {"label":"Win", "x":1.25, "y":4},
+                {"label":"Alt", "x":2.25, "y":4, "w":1.25},
+                {"x":3.5, "y":4, "w":6.25},
+                {"label":"Alt", "x":9.75, "y":4, "w":1.25},
+                {"label":"Win", "x":11, "y":4, "w":1.25},
+                {"label":"Menu", "x":12.25, "y":4, "w":1.25},
+                {"label":"\u2190", "x":13.5, "y":4},
+                {"label":"\u2193", "x":14.5, "y":4},
+                {"label":"\u2192", "x":15.5, "y":4}
+            ]
+        }
+    }
+}
diff --git a/keyboards/maartenwut/nt660/keymaps/default/keymap.c b/keyboards/maartenwut/nt660/keymaps/default/keymap.c
new file mode 100644
index 0000000000..305cc8c873
--- /dev/null
+++ b/keyboards/maartenwut/nt660/keymaps/default/keymap.c
@@ -0,0 +1,26 @@
+/* Copyright 2020 Maarten Dekkers <maartenwut@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+[0] = LAYOUT_all(
+  KC_ESC,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_MINS, KC_EQL,  KC_BSPC, KC_INS,
+  KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,    KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_LBRC, KC_RBRC, KC_BSLS, KC_DEL,
+  KC_CAPS, KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT, KC_BSLS, KC_ENT,
+  KC_LSFT, KC_NUBS, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH, KC_RSFT, KC_UP,
+  KC_LCTL, KC_LGUI, KC_LALT,                   KC_SPC,                             KC_RALT, KC_APP,  KC_RCTRL,KC_LEFT, KC_DOWN, KC_RGHT),
+};
diff --git a/keyboards/maartenwut/nt660/keymaps/maartenwut/config.h b/keyboards/maartenwut/nt660/keymaps/maartenwut/config.h
new file mode 100644
index 0000000000..9b18f58269
--- /dev/null
+++ b/keyboards/maartenwut/nt660/keymaps/maartenwut/config.h
@@ -0,0 +1,3 @@
+#pragma once
+
+#define RETRO_TAPPING
diff --git a/keyboards/maartenwut/nt660/keymaps/maartenwut/keymap.c b/keyboards/maartenwut/nt660/keymaps/maartenwut/keymap.c
new file mode 100644
index 0000000000..3232f8e551
--- /dev/null
+++ b/keyboards/maartenwut/nt660/keymaps/maartenwut/keymap.c
@@ -0,0 +1,58 @@
+/* Copyright 2020 Maarten Dekkers <maartenwut@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include QMK_KEYBOARD_H
+
+// Each layer gets a name for readability, which is then used in the keymap matrix below.
+// The underscores don't mean anything - you can have a layer called STUFF or any other name.
+// Layer names don't all need to be of the same length, obviously, and you can also skip them
+// entirely and just use numbers.
+#define _MA 0
+#define _GA 1
+#define _FL 2
+#define _SP 3
+
+#define SPACE LT(_SP, KC_SPC)
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+[_MA] = LAYOUT_all(
+  KC_ESC,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_MINS,  KC_EQL,  KC_BSPC, KC_MPLY,
+  KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,    KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_LBRC,  KC_RBRC, KC_BSLS, KC_DEL,
+  KC_CAPS, KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT,  _______, KC_ENT,
+  KC_LSFT, _______, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH,  KC_RSFT, KC_UP,
+  KC_LCTL, KC_LGUI, KC_LALT,                   SPACE,                              KC_RALT, KC_RCTRL,MO(_FL),  KC_LEFT, KC_DOWN, KC_RGHT),
+  
+[_GA] = LAYOUT_all(
+  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,  _______, _______, _______,
+  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,  _______, _______, _______,
+  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,  _______, _______,
+  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,  _______, _______,
+  _______, _______, _______,                   KC_SPC,                             _______, _______, _______,  _______, _______, _______),
+  
+[_FL] = LAYOUT_all(
+  KC_GRV,  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_F7,   KC_F8,   KC_F9,   KC_F10,   KC_F11,  KC_F12,  RESET,   KC_PSCR,
+  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,  _______, _______, KC_INS,
+  _______, _______, _______, _______, _______, TG(_GA), _______, _______, _______, _______, _______, _______,  _______, _______,
+  _______, _______, _______, _______, _______, _______, _______, _______, _______, KC_VOLD, KC_VOLU, KC_MUTE,  _______, _______,
+  _______, _______, _______,                   _______,                            _______, _______, _______,  _______, _______, _______),
+  
+[_SP] = LAYOUT_all(
+  KC_GRV,  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_F7,   KC_F8,   KC_F9,   KC_F10,   KC_F11,  KC_F12,  _______, _______,
+  _______, _______, _______, _______, _______, _______, _______, _______, KC_UP,   _______, _______, _______,  _______, _______, _______,
+  _______, _______, _______, _______, _______, _______, _______, KC_LEFT, KC_DOWN, KC_RGHT, _______, _______,  _______, _______,
+  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,  _______, _______,
+  _______, _______, _______,                   _______,                            _______, _______, _______,  _______, _______, _______),
+};
diff --git a/keyboards/maartenwut/nt660/keymaps/via/keymap.c b/keyboards/maartenwut/nt660/keymaps/via/keymap.c
new file mode 100644
index 0000000000..5b8c2e342f
--- /dev/null
+++ b/keyboards/maartenwut/nt660/keymaps/via/keymap.c
@@ -0,0 +1,44 @@
+/* Copyright 2020 Maarten Dekkers <maartenwut@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+[0] = LAYOUT_all(
+  KC_ESC,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_MINS, KC_EQL,  KC_BSPC, KC_INS,
+  KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,    KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_LBRC, KC_RBRC, KC_BSLS, KC_DEL,
+  KC_CAPS, KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT, KC_BSLS, KC_ENT,
+  KC_LSFT, KC_NUBS, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH, KC_RSFT, KC_UP,
+  KC_LCTL, KC_LGUI, KC_LALT,                   KC_SPC,                             KC_RALT, MO(1),   KC_RCTRL,KC_LEFT, KC_DOWN, KC_RGHT),
+[1] = LAYOUT_all(
+  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+  _______, _______, _______,                   _______,                            _______, _______, _______, _______, _______, _______),
+[2] = LAYOUT_all(
+  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+  _______, _______, _______,                   _______,                            _______, _______, _______, _______, _______, _______),
+[3] = LAYOUT_all(
+  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+  _______, _______, _______,                   _______,                            _______, _______, _______, _______, _______, _______),
+};
diff --git a/keyboards/maartenwut/nt660/keymaps/via/rules.mk b/keyboards/maartenwut/nt660/keymaps/via/rules.mk
new file mode 100644
index 0000000000..36b7ba9cbc
--- /dev/null
+++ b/keyboards/maartenwut/nt660/keymaps/via/rules.mk
@@ -0,0 +1,2 @@
+VIA_ENABLE = yes
+LTO_ENABLE = yes
diff --git a/keyboards/maartenwut/nt660/nt660.c b/keyboards/maartenwut/nt660/nt660.c
new file mode 100644
index 0000000000..8ecc58ec17
--- /dev/null
+++ b/keyboards/maartenwut/nt660/nt660.c
@@ -0,0 +1,32 @@
+/* Copyright 2020 Maarten Dekkers <maartenwut@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "nt660.h"
+void matrix_init_kb(void) {
+    matrix_init_user();
+    led_init_ports();
+}
+
+void led_init_ports(void) {
+    setPinOutput(D0);
+}
+
+bool led_update_kb(led_t led_state) {
+    if(led_update_user(led_state)) {
+        writePin(D0, !led_state.caps_lock);
+    }
+
+    return true;
+}
diff --git a/keyboards/maartenwut/nt660/nt660.h b/keyboards/maartenwut/nt660/nt660.h
new file mode 100644
index 0000000000..ce3d4fa624
--- /dev/null
+++ b/keyboards/maartenwut/nt660/nt660.h
@@ -0,0 +1,73 @@
+/* Copyright 2020 Maarten Dekkers <maartenwut@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+#include "quantum.h"
+
+#define XXX KC_NO
+
+/* This is a shortcut to help you visually see your layout.
+ *
+ * The first section contains all of the arguments representing the physical
+ * layout of the board and position of the keys.
+ *
+ * The second converts the arguments into a two-dimensional array which
+ * represents the switch matrix.
+ */
+ 
+#define LAYOUT_all( \
+    k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0a, k0b, k0c, k0f, k0d, \
+    k10, k11, k12, k13, k14, k15, k16, k17, k18, k19, k1a, k1b, k1c, k1f, k1d, \
+    k20, k21, k22, k23, k24, k25, k26, k27, k28, k29, k2a, k2b, k2c, k2f,      \
+    k30, k31, k32, k33, k34, k35, k36, k37, k38, k39, k3a, k3b, k3c, k3f,      \
+    k40, k41, k42,                k46,           k49, k4a, k4b, k4c, k4f, k4d  \
+) \
+{ \
+    {k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0a, k0b, k0c, k0f, k0d}, \
+    {k10, k11, k12, k13, k14, k15, k16, k17, k18, k19, k1a, k1b, k1c, k1f, k1d}, \
+    {k20, k21, k22, k23, k24, k25, k26, k27, k28, k29, k2a, k2b, k2c, k2f, XXX}, \
+    {k30, k31, k32, k33, k34, k35, k36, k37, k38, k39, k3a, k3b, k3c, k3f, XXX}, \
+    {k40, k41, k42, XXX, XXX, XXX, k46, XXX, XXX, k49, k4a, k4b, k4c, k4f, k4d}  \
+}
+#define LAYOUT_66_ansi( \
+    k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0a, k0b, k0c, k0f, k0d, \
+    k10, k11, k12, k13, k14, k15, k16, k17, k18, k19, k1a, k1b, k1c, k1f, k1d, \
+    k20, k21, k22, k23, k24, k25, k26, k27, k28, k29, k2a, k2b,      k2f,      \
+    k30,      k32, k33, k34, k35, k36, k37, k38, k39, k3a, k3b, k3c, k3f,      \
+    k40, k41, k42,                k46,           k49, k4a, k4b, k4c, k4f, k4d  \
+) \
+{ \
+    {k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0a, k0b, k0c, k0f, k0d}, \
+    {k10, k11, k12, k13, k14, k15, k16, k17, k18, k19, k1a, k1b, k1c, k1f, k1d}, \
+    {k20, k21, k22, k23, k24, k25, k26, k27, k28, k29, k2a, k2b, XXX, k2f, XXX}, \
+    {k30, XXX, k32, k33, k34, k35, k36, k37, k38, k39, k3a, k3b, k3c, k3f, XXX}, \
+    {k40, k41, k42, XXX, XXX, XXX, k46, XXX, XXX, k49, k4a, k4b, k4c, k4f, k4d}  \
+}
+
+#define LAYOUT_66_iso( \
+    k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0a, k0b, k0c, k0f, k0d, \
+    k10, k11, k12, k13, k14, k15, k16, k17, k18, k19, k1a, k1b, k1c,      k1d, \
+    k20, k21, k22, k23, k24, k25, k26, k27, k28, k29, k2a, k2b, k2c, k2f,      \
+    k30, k31, k32, k33, k34, k35, k36, k37, k38, k39, k3a, k3b, k3c, k3f,      \
+    k40, k41, k42,                k46,           k49, k4a, k4b, k4c, k4f, k4d  \
+) \
+{ \
+    {k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0a, k0b, k0c, k0f, k0d}, \
+    {k10, k11, k12, k13, k14, k15, k16, k17, k18, k19, k1a, k1b, k1c, XXX, k1d}, \
+    {k20, k21, k22, k23, k24, k25, k26, k27, k28, k29, k2a, k2b, k2c, k2f, XXX}, \
+    {k30, k31, k32, k33, k34, k35, k36, k37, k38, k39, k3a, k3b, k3c, k3f, XXX}, \
+    {k40, k41, k42, XXX, XXX, XXX, k46, XXX, XXX, k49, k4a, k4b, k4c, k4f, k4d}  \
+}
diff --git a/keyboards/maartenwut/nt660/readme.md b/keyboards/maartenwut/nt660/readme.md
new file mode 100644
index 0000000000..cb7b19ca59
--- /dev/null
+++ b/keyboards/maartenwut/nt660/readme.md
@@ -0,0 +1,19 @@
+# nt660
+
+A drop-in replacement PCB for the Leopold FC660M.
+
+* Keyboard Maintainer: [Maartenwut](https://github.com/Maartenwut)
+* Hardware Supported: nt660 PCB
+* Hardware Availability: [maartenwut.com](https://maartenwut.com/product/nt-660/)
+
+## Flashing
+
+In place of the DIP switches on the original PCB there is a small button. Press that to jump to the bootloader. 
+
+---
+
+Make example for this keyboard (after setting up your build environment):
+
+    make maartenwut/nt660:default
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
diff --git a/keyboards/maartenwut/nt660/rules.mk b/keyboards/maartenwut/nt660/rules.mk
new file mode 100644
index 0000000000..b633c90f0a
--- /dev/null
+++ b/keyboards/maartenwut/nt660/rules.mk
@@ -0,0 +1,34 @@
+# MCU name
+MCU = atmega32u4
+
+# Bootloader selection
+#   Teensy       halfkay
+#   Pro Micro    caterina
+#   Atmel DFU    atmel-dfu
+#   LUFA DFU     lufa-dfu
+#   QMK DFU      qmk-dfu
+#   ATmega32A    bootloadHID
+#   ATmega328P   USBasp
+BOOTLOADER = qmk-dfu
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = lite     # Virtual DIP switch configuration
+MOUSEKEY_ENABLE = no        # Mouse keys
+EXTRAKEY_ENABLE = yes       # Audio control and System control
+CONSOLE_ENABLE = no         # Console for debug
+COMMAND_ENABLE = no         # Commands for debug and configuration
+# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
+SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
+# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+NKRO_ENABLE = no            # USB Nkey Rollover
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
+MIDI_ENABLE = no            # MIDI support
+BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
+AUDIO_ENABLE = no           # Audio output on port C6
+FAUXCLICKY_ENABLE = no      # Use buzzer to emulate clicky switches
+HD44780_ENABLE = no         # Enable support for HD44780 based LCDs
+
+LAYOUTS = 66_ansi 66_iso