diff --git a/keyboards/ymdk/ymd40/air40/air40.c b/keyboards/ymdk/ymd40/air40/air40.c
new file mode 100644
index 0000000000..50e7ad9106
--- /dev/null
+++ b/keyboards/ymdk/ymd40/air40/air40.c
@@ -0,0 +1,43 @@
+/* Copyright 2022 Dennis Kruyt (dennis@kruyt.org)
+ *
+ * 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 .
+ */
+
+#include "air40.h"
+
+#if defined(RGB_MATRIX_ENABLE)
+led_config_t g_led_config = {
+ {
+ // Key Matrix to LED Index for center 2u
+ {11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0},
+ {23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12},
+ {35, 34, 33, 32, 31, 30, 29, 28, 27, 26, 25, 24},
+ {50, 49, 48, 47, 46, 43, 41, 40, 39, 38, 37, 36}
+ }, {
+ // LED Index to Physical Position, more positions due to extra leds for other layout options
+ { 0, 0}, { 20, 0}, { 40, 0}, {61, 0}, {81, 0}, {101, 0}, {122, 0}, {142, 0}, {162, 0}, {183, 0}, {203, 0}, {224, 0},
+ { 0, 21}, { 20, 21}, { 40, 21}, {61, 21}, {81, 21}, {101, 21}, {122, 21}, {142, 21}, {162, 21}, {183, 21}, {203, 21}, {224, 21},
+ { 0, 42}, { 20, 42}, { 40, 42}, {61, 42}, {81, 42}, {101, 42}, {122, 42}, {142, 42}, {162, 42}, {183, 42}, {203, 42}, {224, 42},
+ { 0, 64}, { 20, 64}, { 40, 64}, {61, 64}, {81, 64}, {85, 64}, {94, 64}, {103, 64}, {112, 64}, {122, 64}, {142, 64}, {162, 64}, {183, 64}, {203, 64}, {224, 64}
+
+ }, {
+ // LED Index to Flag
+ 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1,
+ 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1,
+ 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1,
+ 1, 1, 1, 1, 1, 1 ,1 ,1, 1, 1, 1, 1, 1, 1, 1
+
+ }
+};
+#endif
diff --git a/keyboards/ymdk/ymd40/air40/air40.h b/keyboards/ymdk/ymd40/air40/air40.h
new file mode 100644
index 0000000000..d28f6d591a
--- /dev/null
+++ b/keyboards/ymdk/ymd40/air40/air40.h
@@ -0,0 +1,79 @@
+/* Copyright 2021 James Young (@noroadsleft)
+ *
+ * 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 .
+ */
+
+#pragma once
+
+#include "quantum.h"
+
+#define LAYOUT_ortho_4x12( \
+ K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B, \
+ K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B, \
+ K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B, \
+ K30, K31, K32, K33, K34, K35, K36, K37, K38, K39, K3A, K3B \
+) { \
+ { K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B }, \
+ { K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B }, \
+ { K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B }, \
+ { K30, K31, K32, K33, K34, K35, K36, K37, K38, K39, K3A, K3B }, \
+}
+
+#define LAYOUT_ortho_4x12_2x2u( \
+ K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B, \
+ K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B, \
+ K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B, \
+ K30, K31, K32, K33, K34, K37, K38, K39, K3A, K3B \
+) { \
+ { K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B }, \
+ { K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B }, \
+ { K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B }, \
+ { K30, K31, K32, K33, K34, KC_NO, KC_NO, K37, K38, K39, K3A, K3B }, \
+}
+
+#define LAYOUT_ortho_4x12_1x2uR( \
+ K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B, \
+ K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B, \
+ K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B, \
+ K30, K31, K32, K33, K34, K35, K37, K38, K39, K3A, K3B \
+) { \
+ { K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B }, \
+ { K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B }, \
+ { K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B }, \
+ { K30, K31, K32, K33, K34, K35, KC_NO, K37, K38, K39, K3A, K3B }, \
+}
+
+#define LAYOUT_ortho_4x12_1x2uL( \
+ K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B, \
+ K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B, \
+ K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B, \
+ K30, K31, K32, K33, K34, K36, K37, K38, K39, K3A, K3B \
+) { \
+ { K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B }, \
+ { K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B }, \
+ { K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B }, \
+ { K30, K31, K32, K33, K34, KC_NO, K36, K37, K38, K39, K3A, K3B }, \
+}
+
+#define LAYOUT_ortho_4x12_1x2uC( \
+ K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B, \
+ K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B, \
+ K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B, \
+ K30, K31, K32, K33, K34, K35, K37, K38, K39, K3A, K3B \
+) { \
+ { K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B }, \
+ { K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B }, \
+ { K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B }, \
+ { K30, K31, K32, K33, K34, K35, KC_NO, K37, K38, K39, K3A, K3B }, \
+}
diff --git a/keyboards/ymdk/ymd40/air40/config.h b/keyboards/ymdk/ymd40/air40/config.h
new file mode 100644
index 0000000000..78a7ba5c04
--- /dev/null
+++ b/keyboards/ymdk/ymd40/air40/config.h
@@ -0,0 +1,94 @@
+/* Copyright 2021 Dennis Kruyt (dennis@kruyt.org)
+ *
+ * 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 .
+ */
+
+#pragma once
+
+#include "config_common.h"
+
+/* key matrix size */
+#define MATRIX_ROWS 4
+#define MATRIX_COLS 12
+
+/*
+ * 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 { D0, B3, B2, B1 }
+#define MATRIX_COL_PINS { F1, F0, B0, C7, F4, F5, F6, F7, D4, D6, B4, D7 }
+
+#define DIODE_DIRECTION COL2ROW
+
+#define RGB_DI_PIN E2
+#define RGB_MATRIX_LED_COUNT 51
+#ifdef RGB_MATRIX_ENABLE
+# define RGB_MATRIX_KEYPRESSES // reacts to keypresses
+# define RGB_MATRIX_MAXIMUM_BRIGHTNESS 130 // Limit to vendor-recommended value
+# define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
+// RGB Matrix Animation modes. Explicitly enabled
+// For full list of effects, see:
+// https://docs.qmk.fm/#/feature_rgb_matrix?id=rgb-matrix-effects
+# define ENABLE_RGB_MATRIX_ALPHAS_MODS
+# define ENABLE_RGB_MATRIX_GRADIENT_UP_DOWN
+# define ENABLE_RGB_MATRIX_GRADIENT_LEFT_RIGHT
+# define ENABLE_RGB_MATRIX_BREATHING
+# define ENABLE_RGB_MATRIX_BAND_SAT
+# define ENABLE_RGB_MATRIX_BAND_VAL
+# define ENABLE_RGB_MATRIX_BAND_PINWHEEL_SAT
+# define ENABLE_RGB_MATRIX_BAND_PINWHEEL_VAL
+# define ENABLE_RGB_MATRIX_BAND_SPIRAL_SAT
+# define ENABLE_RGB_MATRIX_BAND_SPIRAL_VAL
+# define ENABLE_RGB_MATRIX_CYCLE_ALL
+# define ENABLE_RGB_MATRIX_CYCLE_LEFT_RIGHT
+# define ENABLE_RGB_MATRIX_CYCLE_UP_DOWN
+# define ENABLE_RGB_MATRIX_RAINBOW_MOVING_CHEVRON
+# define ENABLE_RGB_MATRIX_CYCLE_OUT_IN
+# define ENABLE_RGB_MATRIX_CYCLE_OUT_IN_DUAL
+# define ENABLE_RGB_MATRIX_CYCLE_PINWHEEL
+# define ENABLE_RGB_MATRIX_CYCLE_SPIRAL
+# define ENABLE_RGB_MATRIX_DUAL_BEACON
+# define ENABLE_RGB_MATRIX_RAINBOW_BEACON
+# define ENABLE_RGB_MATRIX_RAINBOW_PINWHEELS
+# define ENABLE_RGB_MATRIX_RAINDROPS
+# define ENABLE_RGB_MATRIX_JELLYBEAN_RAINDROPS
+# define ENABLE_RGB_MATRIX_HUE_BREATHING
+# define ENABLE_RGB_MATRIX_HUE_PENDULUM
+# define ENABLE_RGB_MATRIX_HUE_WAVE
+# define ENABLE_RGB_MATRIX_PIXEL_RAIN
+# define ENABLE_RGB_MATRIX_PIXEL_FLOW
+# define ENABLE_RGB_MATRIX_PIXEL_FRACTAL
+// enabled only if RGB_MATRIX_FRAMEBUFFER_EFFECTS is defined
+# define ENABLE_RGB_MATRIX_TYPING_HEATMAP
+# define ENABLE_RGB_MATRIX_DIGITAL_RAIN
+// enabled only of RGB_MATRIX_KEYPRESSES or RGB_MATRIX_KEYRELEASES is defined
+# define ENABLE_RGB_MATRIX_SOLID_REACTIVE_SIMPLE
+# define ENABLE_RGB_MATRIX_SOLID_REACTIVE
+# define ENABLE_RGB_MATRIX_SOLID_REACTIVE_WIDE
+# define ENABLE_RGB_MATRIX_SOLID_REACTIVE_MULTIWIDE
+# define ENABLE_RGB_MATRIX_SOLID_REACTIVE_CROSS
+# define ENABLE_RGB_MATRIX_SOLID_REACTIVE_MULTICROSS
+# define ENABLE_RGB_MATRIX_SOLID_REACTIVE_NEXUS
+# define ENABLE_RGB_MATRIX_SOLID_REACTIVE_MULTINEXUS
+# define ENABLE_RGB_MATRIX_SPLASH
+# define ENABLE_RGB_MATRIX_MULTISPLASH
+# define ENABLE_RGB_MATRIX_SOLID_SPLASH
+# define ENABLE_RGB_MATRIX_SOLID_MULTISPLASH
+#endif
\ No newline at end of file
diff --git a/keyboards/ymdk/ymd40/air40/info.json b/keyboards/ymdk/ymd40/air40/info.json
new file mode 100644
index 0000000000..38cc6970ca
--- /dev/null
+++ b/keyboards/ymdk/ymd40/air40/info.json
@@ -0,0 +1,284 @@
+{
+ "keyboard_name": "YMDK Air40",
+ "manufacturer": "YMDK",
+ "url": "",
+ "maintainer": "qmk",
+ "usb": {
+ "vid": "0x45D4",
+ "pid": "0x0911",
+ "device_version": "0.0.1"
+ },
+ "layouts": {
+ "LAYOUT_ortho_4x12": {
+ "layout": [
+ {"label":"K00 (D0,F1)", "x":0, "y":0},
+ {"label":"K01 (D0,F0)", "x":1, "y":0},
+ {"label":"K02 (D0,B0)", "x":2, "y":0},
+ {"label":"K03 (D0,C7)", "x":3, "y":0},
+ {"label":"K04 (D0,F4)", "x":4, "y":0},
+ {"label":"K05 (D0,F5)", "x":5, "y":0},
+ {"label":"K06 (D0,F6)", "x":6, "y":0},
+ {"label":"K07 (D0,F7)", "x":7, "y":0},
+ {"label":"K08 (D0,D4)", "x":8, "y":0},
+ {"label":"K09 (D0,D6)", "x":9, "y":0},
+ {"label":"K0A (D0,B4)", "x":10, "y":0},
+ {"label":"K0B (D0,D7)", "x":11, "y":0},
+
+ {"label":"K10 (B3,F1)", "x":0, "y":1},
+ {"label":"K11 (B3,F0)", "x":1, "y":1},
+ {"label":"K12 (B3,B0)", "x":2, "y":1},
+ {"label":"K13 (B3,C7)", "x":3, "y":1},
+ {"label":"K14 (B3,F4)", "x":4, "y":1},
+ {"label":"K15 (B3,F5)", "x":5, "y":1},
+ {"label":"K16 (B3,F6)", "x":6, "y":1},
+ {"label":"K17 (B3,F7)", "x":7, "y":1},
+ {"label":"K18 (B3,D4)", "x":8, "y":1},
+ {"label":"K19 (B3,D6)", "x":9, "y":1},
+ {"label":"K1A (B3,B4)", "x":10, "y":1},
+ {"label":"K1B (B3,D7)", "x":11, "y":1},
+
+ {"label":"K20 (B2,F1)", "x":0, "y":2},
+ {"label":"K21 (B2,F0)", "x":1, "y":2},
+ {"label":"K22 (B2,B0)", "x":2, "y":2},
+ {"label":"K23 (B2,C7)", "x":3, "y":2},
+ {"label":"K24 (B2,F4)", "x":4, "y":2},
+ {"label":"K25 (B2,F5)", "x":5, "y":2},
+ {"label":"K26 (B2,F6)", "x":6, "y":2},
+ {"label":"K27 (B2,F7)", "x":7, "y":2},
+ {"label":"K28 (B2,D4)", "x":8, "y":2},
+ {"label":"K29 (B2,D6)", "x":9, "y":2},
+ {"label":"K2A (B2,B4)", "x":10, "y":2},
+ {"label":"K2B (B2,D7)", "x":11, "y":2},
+
+ {"label":"K30 (B1,F1)", "x":0, "y":3},
+ {"label":"K31 (B1,F0)", "x":1, "y":3},
+ {"label":"K32 (B1,B0)", "x":2, "y":3},
+ {"label":"K33 (B1,C7)", "x":3, "y":3},
+ {"label":"K34 (B1,F4)", "x":4, "y":3},
+ {"label":"K35 (B1,F5)", "x":5, "y":3},
+ {"label":"K36 (B1,F6)", "x":6, "y":3},
+ {"label":"K37 (B1,F7)", "x":7, "y":3},
+ {"label":"K38 (B1,D4)", "x":8, "y":3},
+ {"label":"K39 (B1,D6)", "x":9, "y":3},
+ {"label":"K3A (B1,B4)", "x":10, "y":3},
+ {"label":"K3B (B1,D7)", "x":11, "y":3}
+ ]
+ },
+ "LAYOUT_ortho_4x12_2x2u": {
+ "layout": [
+ {"label":"K00 (D0,F1)", "x":0, "y":0},
+ {"label":"K01 (D0,F0)", "x":1, "y":0},
+ {"label":"K02 (D0,B0)", "x":2, "y":0},
+ {"label":"K03 (D0,C7)", "x":3, "y":0},
+ {"label":"K04 (D0,F4)", "x":4, "y":0},
+ {"label":"K05 (D0,F5)", "x":5, "y":0},
+ {"label":"K06 (D0,F6)", "x":6, "y":0},
+ {"label":"K07 (D0,F7)", "x":7, "y":0},
+ {"label":"K08 (D0,D4)", "x":8, "y":0},
+ {"label":"K09 (D0,D6)", "x":9, "y":0},
+ {"label":"K0A (D0,B4)", "x":10, "y":0},
+ {"label":"K0B (D0,D7)", "x":11, "y":0},
+
+ {"label":"K10 (B3,F1)", "x":0, "y":1},
+ {"label":"K11 (B3,F0)", "x":1, "y":1},
+ {"label":"K12 (B3,B0)", "x":2, "y":1},
+ {"label":"K13 (B3,C7)", "x":3, "y":1},
+ {"label":"K14 (B3,F4)", "x":4, "y":1},
+ {"label":"K15 (B3,F5)", "x":5, "y":1},
+ {"label":"K16 (B3,F6)", "x":6, "y":1},
+ {"label":"K17 (B3,F7)", "x":7, "y":1},
+ {"label":"K18 (B3,D4)", "x":8, "y":1},
+ {"label":"K19 (B3,D6)", "x":9, "y":1},
+ {"label":"K1A (B3,B4)", "x":10, "y":1},
+ {"label":"K1B (B3,D7)", "x":11, "y":1},
+
+ {"label":"K20 (B2,F1)", "x":0, "y":2},
+ {"label":"K21 (B2,F0)", "x":1, "y":2},
+ {"label":"K22 (B2,B0)", "x":2, "y":2},
+ {"label":"K23 (B2,C7)", "x":3, "y":2},
+ {"label":"K24 (B2,F4)", "x":4, "y":2},
+ {"label":"K25 (B2,F5)", "x":5, "y":2},
+ {"label":"K26 (B2,F6)", "x":6, "y":2},
+ {"label":"K27 (B2,F7)", "x":7, "y":2},
+ {"label":"K28 (B2,D4)", "x":8, "y":2},
+ {"label":"K29 (B2,D6)", "x":9, "y":2},
+ {"label":"K2A (B2,B4)", "x":10, "y":2},
+ {"label":"K2B (B2,D7)", "x":11, "y":2},
+
+ {"label":"K30 (B1,F1)", "x":0, "y":3},
+ {"label":"K31 (B1,F0)", "x":1, "y":3},
+ {"label":"K32 (B1,B0)", "x":2, "y":3},
+ {"label":"K33 (B1,C7)", "x":3, "y":3},
+ {"label":"K34 (B1,F4)", "x":4, "y":3, "w":2},
+ {"label":"K37 (B1,F7)", "x":6, "y":3, "w":2},
+ {"label":"K38 (B1,D4)", "x":8, "y":3},
+ {"label":"K39 (B1,D6)", "x":9, "y":3},
+ {"label":"K3A (B1,B4)", "x":10, "y":3},
+ {"label":"K3B (B1,D7)", "x":11, "y":3}
+ ]
+ },
+ "LAYOUT_ortho_4x12_1x2uR": {
+ "layout": [
+ {"label":"K00 (D0,F1)", "x":0, "y":0},
+ {"label":"K01 (D0,F0)", "x":1, "y":0},
+ {"label":"K02 (D0,B0)", "x":2, "y":0},
+ {"label":"K03 (D0,C7)", "x":3, "y":0},
+ {"label":"K04 (D0,F4)", "x":4, "y":0},
+ {"label":"K05 (D0,F5)", "x":5, "y":0},
+ {"label":"K06 (D0,F6)", "x":6, "y":0},
+ {"label":"K07 (D0,F7)", "x":7, "y":0},
+ {"label":"K08 (D0,D4)", "x":8, "y":0},
+ {"label":"K09 (D0,D6)", "x":9, "y":0},
+ {"label":"K0A (D0,B4)", "x":10, "y":0},
+ {"label":"K0B (D0,D7)", "x":11, "y":0},
+
+ {"label":"K10 (B3,F1)", "x":0, "y":1},
+ {"label":"K11 (B3,F0)", "x":1, "y":1},
+ {"label":"K12 (B3,B0)", "x":2, "y":1},
+ {"label":"K13 (B3,C7)", "x":3, "y":1},
+ {"label":"K14 (B3,F4)", "x":4, "y":1},
+ {"label":"K15 (B3,F5)", "x":5, "y":1},
+ {"label":"K16 (B3,F6)", "x":6, "y":1},
+ {"label":"K17 (B3,F7)", "x":7, "y":1},
+ {"label":"K18 (B3,D4)", "x":8, "y":1},
+ {"label":"K19 (B3,D6)", "x":9, "y":1},
+ {"label":"K1A (B3,B4)", "x":10, "y":1},
+ {"label":"K1B (B3,D7)", "x":11, "y":1},
+
+ {"label":"K20 (B2,F1)", "x":0, "y":2},
+ {"label":"K21 (B2,F0)", "x":1, "y":2},
+ {"label":"K22 (B2,B0)", "x":2, "y":2},
+ {"label":"K23 (B2,C7)", "x":3, "y":2},
+ {"label":"K24 (B2,F4)", "x":4, "y":2},
+ {"label":"K25 (B2,F5)", "x":5, "y":2},
+ {"label":"K26 (B2,F6)", "x":6, "y":2},
+ {"label":"K27 (B2,F7)", "x":7, "y":2},
+ {"label":"K28 (B2,D4)", "x":8, "y":2},
+ {"label":"K29 (B2,D6)", "x":9, "y":2},
+ {"label":"K2A (B2,B4)", "x":10, "y":2},
+ {"label":"K2B (B2,D7)", "x":11, "y":2},
+
+ {"label":"K30 (B1,F1)", "x":0, "y":3},
+ {"label":"K31 (B1,F0)", "x":1, "y":3},
+ {"label":"K32 (B1,B0)", "x":2, "y":3},
+ {"label":"K33 (B1,C7)", "x":3, "y":3},
+ {"label":"K34 (B1,F4)", "x":4, "y":3},
+ {"label":"K35 (B1,F5)", "x":5, "y":3},
+ {"label":"K37 (B1,F7)", "x":6, "y":3, "w":2},
+ {"label":"K38 (B1,D4)", "x":8, "y":3},
+ {"label":"K39 (B1,D6)", "x":9, "y":3},
+ {"label":"K3A (B1,B4)", "x":10, "y":3},
+ {"label":"K3B (B1,D7)", "x":11, "y":3}
+ ]
+ },
+ "LAYOUT_ortho_4x12_1x2uL": {
+ "layout": [
+ {"label":"K00 (D0,F1)", "x":0, "y":0},
+ {"label":"K01 (D0,F0)", "x":1, "y":0},
+ {"label":"K02 (D0,B0)", "x":2, "y":0},
+ {"label":"K03 (D0,C7)", "x":3, "y":0},
+ {"label":"K04 (D0,F4)", "x":4, "y":0},
+ {"label":"K05 (D0,F5)", "x":5, "y":0},
+ {"label":"K06 (D0,F6)", "x":6, "y":0},
+ {"label":"K07 (D0,F7)", "x":7, "y":0},
+ {"label":"K08 (D0,D4)", "x":8, "y":0},
+ {"label":"K09 (D0,D6)", "x":9, "y":0},
+ {"label":"K0A (D0,B4)", "x":10, "y":0},
+ {"label":"K0B (D0,D7)", "x":11, "y":0},
+
+ {"label":"K10 (B3,F1)", "x":0, "y":1},
+ {"label":"K11 (B3,F0)", "x":1, "y":1},
+ {"label":"K12 (B3,B0)", "x":2, "y":1},
+ {"label":"K13 (B3,C7)", "x":3, "y":1},
+ {"label":"K14 (B3,F4)", "x":4, "y":1},
+ {"label":"K15 (B3,F5)", "x":5, "y":1},
+ {"label":"K16 (B3,F6)", "x":6, "y":1},
+ {"label":"K17 (B3,F7)", "x":7, "y":1},
+ {"label":"K18 (B3,D4)", "x":8, "y":1},
+ {"label":"K19 (B3,D6)", "x":9, "y":1},
+ {"label":"K1A (B3,B4)", "x":10, "y":1},
+ {"label":"K1B (B3,D7)", "x":11, "y":1},
+
+ {"label":"K20 (B2,F1)", "x":0, "y":2},
+ {"label":"K21 (B2,F0)", "x":1, "y":2},
+ {"label":"K22 (B2,B0)", "x":2, "y":2},
+ {"label":"K23 (B2,C7)", "x":3, "y":2},
+ {"label":"K24 (B2,F4)", "x":4, "y":2},
+ {"label":"K25 (B2,F5)", "x":5, "y":2},
+ {"label":"K26 (B2,F6)", "x":6, "y":2},
+ {"label":"K27 (B2,F7)", "x":7, "y":2},
+ {"label":"K28 (B2,D4)", "x":8, "y":2},
+ {"label":"K29 (B2,D6)", "x":9, "y":2},
+ {"label":"K2A (B2,B4)", "x":10, "y":2},
+ {"label":"K2B (B2,D7)", "x":11, "y":2},
+
+ {"label":"K30 (B1,F1)", "x":0, "y":3},
+ {"label":"K31 (B1,F0)", "x":1, "y":3},
+ {"label":"K32 (B1,B0)", "x":2, "y":3},
+ {"label":"K33 (B1,C7)", "x":3, "y":3},
+ {"label":"K34 (B1,F4)", "x":4, "y":3, "w":2},
+ {"label":"K36 (B1,F6)", "x":6, "y":3},
+ {"label":"K37 (B1,F7)", "x":7, "y":3},
+ {"label":"K38 (B1,D4)", "x":8, "y":3},
+ {"label":"K39 (B1,D6)", "x":9, "y":3},
+ {"label":"K3A (B1,B4)", "x":10, "y":3},
+ {"label":"K3B (B1,D7)", "x":11, "y":3}
+ ]
+ },
+ "LAYOUT_ortho_4x12_1x2uC": {
+ "layout": [
+ {"label":"K00 (D0,F1)", "x":0, "y":0},
+ {"label":"K01 (D0,F0)", "x":1, "y":0},
+ {"label":"K02 (D0,B0)", "x":2, "y":0},
+ {"label":"K03 (D0,C7)", "x":3, "y":0},
+ {"label":"K04 (D0,F4)", "x":4, "y":0},
+ {"label":"K05 (D0,F5)", "x":5, "y":0},
+ {"label":"K06 (D0,F6)", "x":6, "y":0},
+ {"label":"K07 (D0,F7)", "x":7, "y":0},
+ {"label":"K08 (D0,D4)", "x":8, "y":0},
+ {"label":"K09 (D0,D6)", "x":9, "y":0},
+ {"label":"K0A (D0,B4)", "x":10, "y":0},
+ {"label":"K0B (D0,D7)", "x":11, "y":0},
+
+ {"label":"K10 (B3,F1)", "x":0, "y":1},
+ {"label":"K11 (B3,F0)", "x":1, "y":1},
+ {"label":"K12 (B3,B0)", "x":2, "y":1},
+ {"label":"K13 (B3,C7)", "x":3, "y":1},
+ {"label":"K14 (B3,F4)", "x":4, "y":1},
+ {"label":"K15 (B3,F5)", "x":5, "y":1},
+ {"label":"K16 (B3,F6)", "x":6, "y":1},
+ {"label":"K17 (B3,F7)", "x":7, "y":1},
+ {"label":"K18 (B3,D4)", "x":8, "y":1},
+ {"label":"K19 (B3,D6)", "x":9, "y":1},
+ {"label":"K1A (B3,B4)", "x":10, "y":1},
+ {"label":"K1B (B3,D7)", "x":11, "y":1},
+
+ {"label":"K20 (B2,F1)", "x":0, "y":2},
+ {"label":"K21 (B2,F0)", "x":1, "y":2},
+ {"label":"K22 (B2,B0)", "x":2, "y":2},
+ {"label":"K23 (B2,C7)", "x":3, "y":2},
+ {"label":"K24 (B2,F4)", "x":4, "y":2},
+ {"label":"K25 (B2,F5)", "x":5, "y":2},
+ {"label":"K26 (B2,F6)", "x":6, "y":2},
+ {"label":"K27 (B2,F7)", "x":7, "y":2},
+ {"label":"K28 (B2,D4)", "x":8, "y":2},
+ {"label":"K29 (B2,D6)", "x":9, "y":2},
+ {"label":"K2A (B2,B4)", "x":10, "y":2},
+ {"label":"K2B (B2,D7)", "x":11, "y":2},
+
+ {"label":"K30 (B1,F1)", "x":0, "y":3},
+ {"label":"K31 (B1,F0)", "x":1, "y":3},
+ {"label":"K32 (B1,B0)", "x":2, "y":3},
+ {"label":"K33 (B1,C7)", "x":3, "y":3},
+ {"label":"K34 (B1,F4)", "x":4, "y":3},
+ {"label":"K35 (B1,F5)", "x":5, "y":3, "w":2},
+ {"label":"K37 (B1,F7)", "x":7, "y":3},
+ {"label":"K38 (B1,D4)", "x":8, "y":3},
+ {"label":"K39 (B1,D6)", "x":9, "y":3},
+ {"label":"K3A (B1,B4)", "x":10, "y":3},
+ {"label":"K3B (B1,D7)", "x":11, "y":3}
+ ]
+ }
+
+ }
+}
diff --git a/keyboards/ymdk/ymd40/air40/keymaps/default/keymap.c b/keyboards/ymdk/ymd40/air40/keymaps/default/keymap.c
new file mode 100644
index 0000000000..b798dce7b2
--- /dev/null
+++ b/keyboards/ymdk/ymd40/air40/keymaps/default/keymap.c
@@ -0,0 +1,55 @@
+/* Copyright 2022 Dennis Kruyt (dennis@kruyt.org)
+ *
+ * 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 .
+ */
+
+#include QMK_KEYBOARD_H
+
+enum layer_names {
+ _QWERTY,
+ _LOWER,
+ _RAISE,
+ _ADJUST
+};
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+ [_QWERTY] = LAYOUT_ortho_4x12(
+ KC_TAB, KC_Q, KC_W, KC_E, KC_R, KC_T, KC_Y, KC_U, KC_I, KC_O, KC_P, KC_BSPC,
+ KC_ESC, KC_A, KC_S, KC_D, KC_F, KC_G, KC_H, KC_J, KC_K, KC_L, KC_SCLN, KC_QUOT,
+ KC_LSFT, KC_Z, KC_X, KC_C, KC_V, KC_B, KC_N, KC_M, KC_COMM, KC_DOT, KC_SLSH, KC_ENT,
+ KC_CAPS, KC_LCTL, KC_LALT, KC_LGUI, MO(1), KC_SPC, KC_SPC, MO(2), KC_UP, KC_LEFT, KC_DOWN, KC_RGHT
+ ),
+ [_LOWER] = LAYOUT_ortho_4x12(
+ KC_TILD, KC_EXLM, KC_AT, KC_HASH, KC_DLR, KC_PERC, KC_CIRC, KC_AMPR, KC_ASTR, KC_LPRN, KC_RPRN, KC_BSPC,
+ KC_DEL, KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_UNDS, KC_PLUS, KC_LCBR, KC_RCBR, KC_PIPE,
+ _______, KC_F7, KC_F8, KC_F9, KC_F10, KC_F11, KC_F12, S(KC_NUHS), S(KC_NUBS), KC_HOME, KC_END, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, KC_MNXT, KC_VOLD, KC_VOLU, KC_MPLY
+ ),
+ [_RAISE] = LAYOUT_ortho_4x12(
+ KC_GRV, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_BSPC,
+ KC_DEL, KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_MINS, KC_EQL, KC_LBRC, KC_RBRC, KC_BSLS,
+ _______, KC_F7, KC_F8, KC_F9, KC_F10, KC_F11, KC_F12, KC_NUHS, KC_NUBS, KC_PGUP, KC_PGDN, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, KC_MNXT, KC_VOLD, KC_VOLU, KC_MPLY
+ ),
+ [_ADJUST] = LAYOUT_ortho_4x12(
+ QK_BOOT, RGB_TOG, RGB_HUI, RGB_SAI, RGB_VAI, _______, _______, _______, _______, _______, _______, DB_TOGG,
+ _______, RGB_MOD, RGB_HUD, RGB_SAD, RGB_VAD, AG_NORM, AG_SWAP, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______
+ )
+};
+
+layer_state_t layer_state_set_user(layer_state_t state) {
+ return update_tri_layer_state(state, _LOWER, _RAISE, _ADJUST);
+}
diff --git a/keyboards/ymdk/ymd40/air40/keymaps/via/keymap.c b/keyboards/ymdk/ymd40/air40/keymaps/via/keymap.c
new file mode 100644
index 0000000000..c7b3e4d39c
--- /dev/null
+++ b/keyboards/ymdk/ymd40/air40/keymaps/via/keymap.c
@@ -0,0 +1,44 @@
+/* Copyright 2022 Dennis Kruyt (dennis@kruyt.org)
+ *
+ * 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 .
+ */
+
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+ [0] = LAYOUT_ortho_4x12(
+ KC_TAB, KC_Q, KC_W, KC_E, KC_R, KC_T, KC_Y, KC_U, KC_I, KC_O, KC_P, KC_BSPC,
+ KC_ESC, KC_A, KC_S, KC_D, KC_F, KC_G, KC_H, KC_J, KC_K, KC_L, KC_SCLN, KC_QUOT,
+ KC_LSFT, KC_Z, KC_X, KC_C, KC_V, KC_B, KC_N, KC_M, KC_COMM, KC_DOT, KC_UP, KC_ENT,
+ KC_LCTL, KC_LALT, KC_LGUI, KC_PIPE, MO(1), KC_SPC, KC_SPC, MO(2), KC_SLSH, KC_LEFT, KC_DOWN, KC_RGHT
+ ),
+ [1] = LAYOUT_ortho_4x12(
+ KC_TILD, KC_EXLM, KC_AT, KC_HASH, KC_DLR, KC_PERC, KC_CIRC, KC_AMPR, KC_ASTR, KC_LPRN, KC_RPRN, KC_DEL,
+ KC_DEL, KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_UNDS, KC_PLUS, KC_LCBR, KC_RCBR, KC_PIPE,
+ _______, KC_F7, KC_F8, KC_F9, KC_F10, KC_F11, KC_F12, S(KC_NUHS), S(KC_NUBS), _______, KC_VOLU, _______,
+ _______, _______, _______, _______, _______, _______, _______, MO(3), _______, KC_MNXT, KC_VOLD, KC_MPLY
+ ),
+ [2] = LAYOUT_ortho_4x12(
+ KC_GRV, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_DEL,
+ KC_DEL, KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_MINS, KC_EQL, KC_LBRC, KC_RBRC, KC_BSLS,
+ _______, KC_F7, KC_F8, KC_F9, KC_F10, KC_F11, KC_F12, KC_NUHS, KC_NUBS, _______, KC_PGUP, _______,
+ _______, _______, _______, _______, MO(3), _______, _______, _______, _______, KC_HOME, KC_PGDN, KC_END
+ ),
+ [3] = LAYOUT_ortho_4x12(
+ QK_BOOT, RGB_TOG, RGB_HUI, RGB_SAI, RGB_VAI, _______, _______, _______, _______, _______, _______, DB_TOGG,
+ _______, RGB_MOD, RGB_HUD, RGB_SAD, RGB_VAD, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______
+ )
+};
diff --git a/keyboards/ymdk/ymd40/air40/keymaps/via/rules.mk b/keyboards/ymdk/ymd40/air40/keymaps/via/rules.mk
new file mode 100644
index 0000000000..43061db1dd
--- /dev/null
+++ b/keyboards/ymdk/ymd40/air40/keymaps/via/rules.mk
@@ -0,0 +1,2 @@
+VIA_ENABLE = yes
+LTO_ENABLE = yes
\ No newline at end of file
diff --git a/keyboards/ymdk/ymd40/air40/readme.md b/keyboards/ymdk/ymd40/air40/readme.md
new file mode 100644
index 0000000000..31bf509c2f
--- /dev/null
+++ b/keyboards/ymdk/ymd40/air40/readme.md
@@ -0,0 +1,19 @@
+# YMD40 AIR40
+
+A 40% ortholinear keyboard with per switch LED support and USB Type C.
+
+* Keyboard Maintainer: [The QMK Community](https://github.com/qmk)
+* Hardware Supported: YMD40 AIR40 PCB (ATmega32U4)
+* Hardware Availability: [ymdkey.com](https://ymdkey.com/collections/40-mini-diy/products/air40-rgb-hot-swap-cute-40-mechanical-keyboard-assembled-qmk-via-type-c-pcb-cnc-case-plate-kit)
+
+Make example for this keyboard (after setting up your build environment):
+
+ make ymdk/ymd40/air40:default
+
+Flashing example for this keyboard:
+
+ make ymdk/ymd40/air40:default:flash
+
+To reset the board into bootloader mode, hold the key at the top left of the keyboard while connecting the USB cable (also erases persistent settings).
+
+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/ymdk/ymd40/air40/rules.mk b/keyboards/ymdk/ymd40/air40/rules.mk
new file mode 100644
index 0000000000..3325a699df
--- /dev/null
+++ b/keyboards/ymdk/ymd40/air40/rules.mk
@@ -0,0 +1,26 @@
+# MCU name
+MCU = atmega32u4
+
+# Bootloader selection
+BOOTLOADER = atmel-dfu
+
+# Build Options
+# change yes to no to disable
+#
+BOOTMAGIC_ENABLE = yes # Enable Bootmagic Lite
+MOUSEKEY_ENABLE = yes # Mouse keys
+EXTRAKEY_ENABLE = yes # Audio control and System control
+CONSOLE_ENABLE = no # Console for debug
+COMMAND_ENABLE = no # Commands for debug and configuration
+NKRO_ENABLE = no # Enable N-Key Rollover
+BACKLIGHT_ENABLE = no # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = no
+RGBLIGHT_SUPPORTED = no
+RGB_MATRIX_ENABLE = yes
+RGB_MATRIX_DRIVER = WS2812
+AUDIO_ENABLE = no # Audio output
+AUDIO_SUPPORTED = no
+KEY_LOCK_ENABLE = no
+
+LAYOUTS = ortho_4x12
+