diff --git a/keyboards/mexsistor/ludmila/config.h b/keyboards/mexsistor/ludmila/config.h
new file mode 100644
index 00000000000..c459adcc05a
--- /dev/null
+++ b/keyboards/mexsistor/ludmila/config.h
@@ -0,0 +1,95 @@
+/*
+Copyright 2020 Kevin M.
+
+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"
+
+/* USB Device descriptor parameter */
+#define VENDOR_ID 0x2808
+#define PRODUCT_ID 0x0203
+#define DEVICE_VER 0x0001
+#define MANUFACTURER Kevin M.
+#define PRODUCT ludmila
+
+/* key matrix size */
+#define MATRIX_ROWS 3
+#define MATRIX_COLS 2
+
+/*
+ * 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 \
+ { F0, C7 }
+#define MATRIX_COL_PINS \
+ { F4, F1 }
+
+/* COL2ROW, ROW2COL*/
+#define DIODE_DIRECTION COL2ROW
+
+#define RGB_DI_PIN D1
+// #ifdef RGB_DI_PIN
+#define RGBLED_NUM 5
+#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 20
+
+/* ENCODER THINGS */
+// #define ENCODER_DIRECTION_FLIP
+#define ENCODERS_PAD_A \
+ { F6 }
+#define ENCODERS_PAD_B \
+ { F5 }
+
+/* Tap Dance timing */
+#define TAPPING_TERM 200
+
+/* 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
diff --git a/keyboards/mexsistor/ludmila/info.json b/keyboards/mexsistor/ludmila/info.json
new file mode 100644
index 00000000000..453f1cf4f1f
--- /dev/null
+++ b/keyboards/mexsistor/ludmila/info.json
@@ -0,0 +1,19 @@
+{
+ "keyboard_name": "ludmila",
+ "url": "",
+ "maintainer": "Kevin M.",
+ "width": 3,
+ "height": 2,
+ "layouts": {
+ "LAYOUT": {
+ "layout": [
+ {"label": "k00", "x": 0, "y": 0},
+ {"label": "k01", "x": 1, "y": 0},
+ {"label": "k02", "x": 2, "y": 0},
+
+ {"label": "k10", "x": 0, "y": 1, "w": 1.5},
+ {"label": "k12", "x": 1.5, "y": 1, "w": 1.5}
+ ]
+ }
+ }
+}
diff --git a/keyboards/mexsistor/ludmila/keymaps/default/keymap.c b/keyboards/mexsistor/ludmila/keymaps/default/keymap.c
new file mode 100644
index 00000000000..01d8435a1db
--- /dev/null
+++ b/keyboards/mexsistor/ludmila/keymaps/default/keymap.c
@@ -0,0 +1,55 @@
+/* Copyright 2020 Kevin M.
+ *
+ * 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
+
+// Keyboard Layers
+enum keyboard_layers{
+ _BASE = 0,
+ _CONTROL
+};
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+ [_BASE] = LAYOUT( /* Base */
+ KC_A, KC_B, KC_C,
+ KC_D, KC_E
+
+ ),
+
+};
+
+void encoder_update_user(uint8_t index, bool clockwise) {
+ if (index == 0) {
+ if (clockwise) {
+ tap_code(KC_F);
+ } else {
+ tap_code(KC_G);
+ }
+ }
+}
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+ switch (keycode) {
+ // Example of "pressing" CONTROL+SHIFT+V instead of "A" on keyboard
+ // More info: https://docs.qmk.fm/#/feature_macros
+ // case KC_A:
+ // if (record->event.pressed) {
+ // SEND_STRING(SS_LCTL(SS_LSFT("v")));
+ // } else {
+ // }
+ // break;
+ }
+ return true;
+};
diff --git a/keyboards/mexsistor/ludmila/keymaps/default/readme.md b/keyboards/mexsistor/ludmila/keymaps/default/readme.md
new file mode 100644
index 00000000000..1fb3e58afe9
--- /dev/null
+++ b/keyboards/mexsistor/ludmila/keymaps/default/readme.md
@@ -0,0 +1 @@
+# The default keymap for ludmila
diff --git a/keyboards/mexsistor/ludmila/ludmila.c b/keyboards/mexsistor/ludmila/ludmila.c
new file mode 100644
index 00000000000..4125d196717
--- /dev/null
+++ b/keyboards/mexsistor/ludmila/ludmila.c
@@ -0,0 +1,17 @@
+/* Copyright 2020 Kevin M.
+ *
+ * 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 "ludmila.h"
diff --git a/keyboards/mexsistor/ludmila/ludmila.h b/keyboards/mexsistor/ludmila/ludmila.h
new file mode 100644
index 00000000000..19c2fd9dd8f
--- /dev/null
+++ b/keyboards/mexsistor/ludmila/ludmila.h
@@ -0,0 +1,37 @@
+/* Copyright 2020 Kevin M.
+ *
+ * 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 ___ KC_NO
+
+/* This 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( \
+ k00, k01, k20, \
+ k10, k11 \
+) { \
+ { k00, k01, }, \
+ { k10, k11, }, \
+ { k20, ___, } \
+}
diff --git a/keyboards/mexsistor/ludmila/matrix.c b/keyboards/mexsistor/ludmila/matrix.c
new file mode 100644
index 00000000000..ae2527c3aea
--- /dev/null
+++ b/keyboards/mexsistor/ludmila/matrix.c
@@ -0,0 +1,258 @@
+/*
+Copyright 2012-2018 Jun Wako, Jack Humbert, Yiancar
+
+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
+#include
+#include "wait.h"
+#include "util.h"
+#include "matrix.h"
+#include "debounce.h"
+#include "quantum.h"
+
+// Encoder things
+#define ENC_SW F7
+static bool read_encoder_switches(matrix_row_t current_matrix[], uint8_t current_row);
+
+#ifdef MATRIX_MASKED
+extern const matrix_row_t matrix_mask[];
+#endif
+
+#ifdef DIRECT_PINS
+static pin_t direct_pins[MATRIX_ROWS][MATRIX_COLS] = DIRECT_PINS;
+#elif (DIODE_DIRECTION == ROW2COL) || (DIODE_DIRECTION == COL2ROW)
+static const pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
+static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
+#endif
+
+/* matrix state(1:on, 0:off) */
+static matrix_row_t raw_matrix[MATRIX_ROWS]; // raw values
+static matrix_row_t matrix[MATRIX_ROWS]; // debounced values
+
+// helper functions
+
+inline bool matrix_is_on(uint8_t row, uint8_t col) { return (matrix[row] & ((matrix_row_t)1 << col)); }
+
+inline matrix_row_t matrix_get_row(uint8_t row) {
+ // Matrix mask lets you disable switches in the returned matrix data. For example, if you have a
+ // switch blocker installed and the switch is always pressed.
+#ifdef MATRIX_MASKED
+ return matrix[row] & matrix_mask[row];
+#else
+ return matrix[row];
+#endif
+}
+
+// matrix code
+
+#ifdef DIRECT_PINS
+
+static void init_pins(void) {
+ for (int row = 0; row < MATRIX_ROWS; row++) {
+ for (int col = 0; col < MATRIX_COLS; col++) {
+ pin_t pin = direct_pins[row][col];
+ if (pin != NO_PIN) {
+ setPinInputHigh(pin);
+ }
+ }
+ }
+}
+
+static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
+ matrix_row_t last_row_value = current_matrix[current_row];
+ current_matrix[current_row] = 0;
+
+ for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
+ pin_t pin = direct_pins[current_row][col_index];
+ if (pin != NO_PIN) {
+ current_matrix[current_row] |= readPin(pin) ? 0 : (MATRIX_ROW_SHIFTER << col_index);
+ }
+ }
+
+ return (last_row_value != current_matrix[current_row]);
+}
+
+#elif (DIODE_DIRECTION == COL2ROW)
+
+static void select_row(uint8_t row) {
+ setPinOutput(row_pins[row]);
+ writePinLow(row_pins[row]);
+}
+
+static void unselect_row(uint8_t row) { setPinInputHigh(row_pins[row]); }
+
+static void unselect_rows(void) {
+ for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
+ setPinInputHigh(row_pins[x]);
+ }
+}
+
+static void init_pins(void) {
+ unselect_rows();
+ for (uint8_t x = 0; x < MATRIX_COLS; x++) {
+ setPinInputHigh(col_pins[x]);
+ }
+}
+
+static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
+ // Store last value of row prior to reading
+ matrix_row_t last_row_value = current_matrix[current_row];
+
+ // Clear data in matrix row
+ current_matrix[current_row] = 0;
+
+ // Select row and wait for row selecton to stabilize
+ select_row(current_row);
+ wait_us(30);
+
+ // For each col...
+ for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
+ // Select the col pin to read (active low)
+ uint8_t pin_state = readPin(col_pins[col_index]);
+
+ // Populate the matrix row with the state of the col pin
+ current_matrix[current_row] |= pin_state ? 0 : (MATRIX_ROW_SHIFTER << col_index);
+ }
+
+ // Unselect row
+ unselect_row(current_row);
+
+ return (last_row_value != current_matrix[current_row]);
+}
+
+#elif (DIODE_DIRECTION == ROW2COL)
+
+static void select_col(uint8_t col) {
+ setPinOutput(col_pins[col]);
+ writePinLow(col_pins[col]);
+}
+
+static void unselect_col(uint8_t col) { setPinInputHigh(col_pins[col]); }
+
+static void unselect_cols(void) {
+ for (uint8_t x = 0; x < MATRIX_COLS; x++) {
+ setPinInputHigh(col_pins[x]);
+ }
+}
+
+static void init_pins(void) {
+ unselect_cols();
+ for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
+ setPinInputHigh(row_pins[x]);
+ }
+}
+
+static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col) {
+ bool matrix_changed = false;
+
+ // Select col and wait for col selecton to stabilize
+ select_col(current_col);
+ wait_us(30);
+
+ // For each row...
+ for (uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++) {
+ // Store last value of row prior to reading
+ matrix_row_t last_row_value = current_matrix[row_index];
+
+ // Check row pin state
+ if (readPin(row_pins[row_index]) == 0) {
+ // Pin LO, set col bit
+ current_matrix[row_index] |= (MATRIX_ROW_SHIFTER << current_col);
+ } else {
+ // Pin HI, clear col bit
+ current_matrix[row_index] &= ~(MATRIX_ROW_SHIFTER << current_col);
+ }
+
+ // Determine if the matrix changed state
+ if ((last_row_value != current_matrix[row_index]) && !(matrix_changed)) {
+ matrix_changed = true;
+ }
+ }
+
+ // Unselect col
+ unselect_col(current_col);
+
+ return matrix_changed;
+}
+
+#endif
+
+void matrix_init(void) {
+ // initialize key pins
+ init_pins();
+
+ // initialize matrix state: all keys off
+ for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+ raw_matrix[i] = 0;
+ matrix[i] = 0;
+ }
+
+ debounce_init(MATRIX_ROWS);
+
+ matrix_init_quantum();
+}
+
+uint8_t matrix_scan(void) {
+ bool changed = false;
+
+#if defined(DIRECT_PINS) || (DIODE_DIRECTION == COL2ROW)
+ // Set row, read cols
+ for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
+ changed |= read_cols_on_row(raw_matrix, current_row);
+ }
+#elif (DIODE_DIRECTION == ROW2COL)
+ // Set col, read rows
+ for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
+ changed |= read_rows_on_col(raw_matrix, current_col);
+ }
+#endif
+
+ debounce(raw_matrix, matrix, MATRIX_ROWS, changed);
+
+ // Read encoder switches, already debounced
+ changed |= read_encoder_switches(matrix, 2);
+
+ matrix_scan_quantum();
+ return (uint8_t)changed;
+}
+
+// Customisations for the encoders
+void matrix_init_kb(void) {
+ setPinInput(ENC_SW);
+}
+
+void matrix_scan_kb(void) {}
+
+void matrix_print(void) {}
+
+static bool read_encoder_switches(matrix_row_t current_matrix[], uint8_t current_row) {
+ // Store last value of row prior to reading
+ matrix_row_t last_row_value = current_matrix[current_row];
+
+ // Clear data in matrix row
+ current_matrix[current_row] = 0;
+
+ // Debounce the encoder buttons using a shift register
+ static uint8_t btn_1_array;
+ bool btn_1_pressed = 0;
+ btn_1_array <<= 1;
+ btn_1_array |= readPin(ENC_SW);
+ (btn_1_array == 0b11111111) ? (btn_1_pressed = 1) : (btn_1_pressed = 0);
+
+ // Populate the matrix row with the state of the encoder
+ current_matrix[current_row] |= btn_1_pressed ? (1 << 0) : 0;
+
+ return (last_row_value != current_matrix[current_row]);
+}
diff --git a/keyboards/mexsistor/ludmila/readme.md b/keyboards/mexsistor/ludmila/readme.md
new file mode 100644
index 00000000000..5c0c40a35f8
--- /dev/null
+++ b/keyboards/mexsistor/ludmila/readme.md
@@ -0,0 +1,22 @@
+# ludmila
+
+
+
+Ludmila is a 4 Key Macropad with one rotary encoder.
+
+* Keyboard Maintainer: [Kevin M.](https://github.com/mexsistor)
+* Hardware Supported: Ludmila PCB (atmega32u4)
+* Hardware Availability: [Kevin M:](https://www.mexsistor.com/)
+Make example for this keyboard (after setting up your build environment):
+
+ make mexsistor/ludmila:default
+
+Flashing example for this keyboard:
+
+ make mexsistor/ludmila:default:flash
+
+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).
+
+All credits for code creation go to Josh Johnson, who was kind enough to support me in making the software compatible with my macropad.
+()
+()
diff --git a/keyboards/mexsistor/ludmila/rules.mk b/keyboards/mexsistor/ludmila/rules.mk
new file mode 100644
index 00000000000..c115a35f8d3
--- /dev/null
+++ b/keyboards/mexsistor/ludmila/rules.mk
@@ -0,0 +1,31 @@
+# MCU name
+MCU = atmega32u4
+
+# Bootloader selection
+BOOTLOADER = caterina
+
+# Build Options
+# change yes to no to disable
+#
+CUSTOM_MATRIX = yes # Custom scanning of matrix
+BOOTMAGIC_ENABLE = no # Virtual DIP switch configuration
+MOUSEKEY_ENABLE = yes # Mouse keys
+EXTRAKEY_ENABLE = yes # Audio control and System control
+CONSOLE_ENABLE = yes # Console for debug
+COMMAND_ENABLE = yes # 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 = yes # Enable keyboard RGB underglow
+MIDI_ENABLE = no # MIDI support
+UNICODE_ENABLE = no # Unicode
+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
+ENCODER_ENABLE = yes # Rotary Encoder support
+TAP_DANCE_ENABLE = no # Support for tap dancing
+
+SRC = matrix.c