diff --git a/keyboards/cipulot/ec1_at/config.h b/keyboards/cipulot/ec1_at/config.h
new file mode 100644
index 00000000000..5e7af3fac57
--- /dev/null
+++ b/keyboards/cipulot/ec1_at/config.h
@@ -0,0 +1,61 @@
+/* Copyright 2024 Cipulot
+ *
+ * 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 3 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
+
+#define MATRIX_ROWS 5
+#define MATRIX_COLS 21
+
+#define UNUSED_POSITIONS_LIST { {2, 16}, {4, 5}, {4, 7}, {4, 9}, {4, 12}, {4, 16} }
+
+#define MATRIX_ROW_PINS {A8, B15, B14, B12, B13}
+
+#define AMUX_COUNT 2
+#define AMUX_MAX_COLS_COUNT 16
+
+#define AMUX_EN_PINS {B5, A15}
+
+#define AMUX_SEL_PINS {B6, B7, B4, B3}
+
+#define AMUX_COL_CHANNELS_SIZES {16, 5}
+
+#define AMUX_0_COL_CHANNELS {5, 6, 7, 4, 3, 2, 1, 0, 8, 15, 14, 13, 12, 10, 9, 11}
+
+#define AMUX_1_COL_CHANNELS {4, 2, 1, 0, 3}
+
+#define AMUX_COL_CHANNELS AMUX_0_COL_CHANNELS, AMUX_1_COL_CHANNELS
+
+#define DISCHARGE_PIN A2
+#define ANALOG_PORT A3
+
+#define DEFAULT_ACTUATION_MODE 0
+#define DEFAULT_MODE_0_ACTUATION_LEVEL 550
+#define DEFAULT_MODE_0_RELEASE_LEVEL 500
+#define DEFAULT_MODE_1_INITIAL_DEADZONE_OFFSET DEFAULT_MODE_0_ACTUATION_LEVEL
+#define DEFAULT_MODE_1_ACTUATION_OFFSET 70
+#define DEFAULT_MODE_1_RELEASE_OFFSET 70
+#define DEFAULT_EXTREMUM 1023
+#define EXPECTED_NOISE_FLOOR 0
+#define NOISE_FLOOR_THRESHOLD 50
+#define BOTTOMING_CALIBRATION_THRESHOLD 50
+#define DEFAULT_NOISE_FLOOR_SAMPLING_COUNT 30
+#define DEFAULT_BOTTOMING_READING 1023
+#define DEFAULT_CALIBRATION_STARTER true
+
+#define DISCHARGE_TIME 10
+
+#define EECONFIG_KB_DATA_SIZE 219
+#define DYNAMIC_KEYMAP_MACRO_COUNT 30
diff --git a/keyboards/cipulot/ec1_at/halconf.h b/keyboards/cipulot/ec1_at/halconf.h
new file mode 100644
index 00000000000..6b63cb5af98
--- /dev/null
+++ b/keyboards/cipulot/ec1_at/halconf.h
@@ -0,0 +1,21 @@
+/* Copyright 2024 Cipulot
+ *
+ * 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 3 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
+
+#define HAL_USE_ADC TRUE
+
+#include_next
diff --git a/keyboards/cipulot/ec1_at/keyboard.json b/keyboards/cipulot/ec1_at/keyboard.json
new file mode 100644
index 00000000000..9a7a0ae04e7
--- /dev/null
+++ b/keyboards/cipulot/ec1_at/keyboard.json
@@ -0,0 +1,142 @@
+{
+ "manufacturer": "Cipulot",
+ "keyboard_name": "EC1-AT",
+ "maintainer": "Cipulot",
+ "bootloader": "stm32-dfu",
+ "build": {
+ "lto": true
+ },
+ "diode_direction": "COL2ROW",
+ "eeprom": {
+ "wear_leveling": {
+ "backing_size": 16384
+ }
+ },
+ "features": {
+ "bootmagic": false,
+ "console": true,
+ "extrakey": true,
+ "mousekey": true,
+ "nkro": true
+ },
+ "processor": "STM32F411",
+ "qmk": {
+ "locking": {
+ "enabled": true,
+ "resync": true
+ }
+ },
+ "usb": {
+ "device_version": "0.0.1",
+ "pid": "0x6BCE",
+ "shared_endpoint": {
+ "keyboard": true
+ },
+ "vid": "0x6369"
+ },
+ "layouts": {
+ "LAYOUT": {
+ "layout": [
+ {"matrix": [0, 0], "x": 0, "y": 0},
+ {"matrix": [0, 1], "x": 1, "y": 0},
+ {"matrix": [0, 2], "x": 2.25, "y": 0},
+ {"matrix": [0, 3], "x": 3.25, "y": 0},
+ {"matrix": [0, 4], "x": 4.25, "y": 0},
+ {"matrix": [0, 5], "x": 5.25, "y": 0},
+ {"matrix": [0, 6], "x": 6.25, "y": 0},
+ {"matrix": [0, 7], "x": 7.25, "y": 0},
+ {"matrix": [0, 8], "x": 8.25, "y": 0},
+ {"matrix": [0, 9], "x": 9.25, "y": 0},
+ {"matrix": [0, 10], "x": 10.25, "y": 0},
+ {"matrix": [0, 11], "x": 11.25, "y": 0},
+ {"matrix": [0, 12], "x": 12.25, "y": 0},
+ {"matrix": [0, 13], "x": 13.25, "y": 0},
+ {"matrix": [0, 14], "x": 14.25, "y": 0},
+ {"matrix": [0, 15], "x": 15.25, "y": 0},
+ {"matrix": [0, 16], "x": 16.25, "y": 0},
+ {"matrix": [0, 17], "x": 17.5, "y": 0},
+ {"matrix": [0, 18], "x": 18.5, "y": 0},
+ {"matrix": [0, 19], "x": 19.5, "y": 0},
+ {"matrix": [0, 20], "x": 20.5, "y": 0},
+ {"matrix": [1, 0], "x": 0, "y": 1},
+ {"matrix": [1, 1], "x": 1, "y": 1},
+ {"matrix": [1, 2], "x": 2.25, "y": 1, "w": 1.5},
+ {"matrix": [1, 3], "x": 3.75, "y": 1},
+ {"matrix": [1, 4], "x": 4.75, "y": 1},
+ {"matrix": [1, 5], "x": 5.75, "y": 1},
+ {"matrix": [1, 6], "x": 6.75, "y": 1},
+ {"matrix": [1, 7], "x": 7.75, "y": 1},
+ {"matrix": [1, 8], "x": 8.75, "y": 1},
+ {"matrix": [1, 9], "x": 9.75, "y": 1},
+ {"matrix": [1, 10], "x": 10.75, "y": 1},
+ {"matrix": [1, 11], "x": 11.75, "y": 1},
+ {"matrix": [1, 12], "x": 12.75, "y": 1},
+ {"matrix": [1, 13], "x": 13.75, "y": 1},
+ {"matrix": [1, 14], "x": 14.75, "y": 1},
+ {"matrix": [1, 15], "x": 15.75, "y": 1, "w": 0.75},
+ {"matrix": [1, 16], "x": 16.5, "y": 1, "w": 0.75},
+ {"matrix": [1, 17], "x": 17.5, "y": 1},
+ {"matrix": [1, 18], "x": 18.5, "y": 1},
+ {"matrix": [1, 19], "x": 19.5, "y": 1},
+ {"matrix": [1, 20], "x": 20.5, "y": 1},
+ {"matrix": [2, 0], "x": 0, "y": 2},
+ {"matrix": [2, 1], "x": 1, "y": 2},
+ {"matrix": [2, 2], "x": 2.25, "y": 2, "w": 1.75},
+ {"matrix": [2, 3], "x": 4, "y": 2},
+ {"matrix": [2, 4], "x": 5, "y": 2},
+ {"matrix": [2, 5], "x": 6, "y": 2},
+ {"matrix": [2, 6], "x": 7, "y": 2},
+ {"matrix": [2, 7], "x": 8, "y": 2},
+ {"matrix": [2, 8], "x": 9, "y": 2},
+ {"matrix": [2, 9], "x": 10, "y": 2},
+ {"matrix": [2, 10], "x": 11, "y": 2},
+ {"matrix": [2, 11], "x": 12, "y": 2},
+ {"matrix": [2, 12], "x": 13, "y": 2},
+ {"matrix": [2, 13], "x": 14, "y": 2},
+ {"matrix": [2, 14], "x": 15, "y": 2},
+ {"matrix": [2, 15], "x": 16, "y": 2, "w": 1.25},
+ {"matrix": [2, 17], "x": 17.5, "y": 2},
+ {"matrix": [2, 18], "x": 18.5, "y": 2},
+ {"matrix": [2, 19], "x": 19.5, "y": 2},
+ {"matrix": [2, 20], "x": 20.5, "y": 2},
+ {"matrix": [3, 0], "x": 0, "y": 3},
+ {"matrix": [3, 1], "x": 1, "y": 3},
+ {"matrix": [3, 2], "x": 2.25, "y": 3, "w": 1.25},
+ {"matrix": [3, 3], "x": 3.5, "y": 3},
+ {"matrix": [3, 4], "x": 4.5, "y": 3},
+ {"matrix": [3, 5], "x": 5.5, "y": 3},
+ {"matrix": [3, 6], "x": 6.5, "y": 3},
+ {"matrix": [3, 7], "x": 7.5, "y": 3},
+ {"matrix": [3, 8], "x": 8.5, "y": 3},
+ {"matrix": [3, 9], "x": 9.5, "y": 3},
+ {"matrix": [3, 10], "x": 10.5, "y": 3},
+ {"matrix": [3, 11], "x": 11.5, "y": 3},
+ {"matrix": [3, 12], "x": 12.5, "y": 3},
+ {"matrix": [3, 13], "x": 13.5, "y": 3},
+ {"matrix": [3, 14], "x": 14.5, "y": 3},
+ {"matrix": [3, 15], "x": 15.5, "y": 3, "w": 0.75},
+ {"matrix": [3, 16], "x": 16.25, "y": 3},
+ {"matrix": [3, 17], "x": 17.5, "y": 3},
+ {"matrix": [3, 18], "x": 18.5, "y": 3},
+ {"matrix": [3, 19], "x": 19.5, "y": 3},
+ {"matrix": [3, 20], "x": 20.5, "y": 3},
+ {"matrix": [4, 0], "x": 0, "y": 4},
+ {"matrix": [4, 1], "x": 1, "y": 4},
+ {"matrix": [4, 2], "x": 2.25, "y": 4, "w": 1.5},
+ {"matrix": [4, 3], "x": 3.75, "y": 4},
+ {"matrix": [4, 4], "x": 4.75, "y": 4, "w": 1.5},
+ {"matrix": [4, 6], "x": 6.25, "y": 4, "w": 1.5},
+ {"matrix": [4, 8], "x": 7.75, "y": 4, "w": 2.5},
+ {"matrix": [4, 10], "x": 10.25, "y": 4, "w": 1.5},
+ {"matrix": [4, 11], "x": 11.75, "y": 4, "w": 1.5},
+ {"matrix": [4, 13], "x": 13.25, "y": 4, "w": 1.5},
+ {"matrix": [4, 14], "x": 14.75, "y": 4},
+ {"matrix": [4, 15], "x": 15.75, "y": 4, "w": 1.5},
+ {"matrix": [4, 17], "x": 17.5, "y": 4},
+ {"matrix": [4, 18], "x": 18.5, "y": 4},
+ {"matrix": [4, 19], "x": 19.5, "y": 4},
+ {"matrix": [4, 20], "x": 20.5, "y": 4}
+ ]
+ }
+ }
+}
diff --git a/keyboards/cipulot/ec1_at/keymaps/default/keymap.c b/keyboards/cipulot/ec1_at/keymaps/default/keymap.c
new file mode 100644
index 00000000000..b0e5e3aac35
--- /dev/null
+++ b/keyboards/cipulot/ec1_at/keymaps/default/keymap.c
@@ -0,0 +1,42 @@
+/* Copyright 2024 Cipulot
+ *
+ * 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 3 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] = {
+ // clang-format off
+ [0] = LAYOUT(
+ _______, _______, QK_GESC, 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_BSPC, KC_NUM, KC_PSLS, KC_PAST, KC_PMNS,
+ _______, _______, 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_ENTER, KC_P7, KC_P8, KC_P9, KC_PMNS,
+ _______, _______, 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_NUHS, KC_ENTER, KC_P4, KC_P5, KC_P6, KC_PPLS,
+ _______, _______, 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_RSFT, MO(1), KC_P1, KC_P2, KC_P3, KC_PENT,
+ _______, _______, KC_LCTL, KC_LGUI, KC_LALT, KC_SPC, KC_SPC, KC_SPC, KC_RALT, KC_RALT, MO(1), KC_RCTL, KC_P0, KC_P0, KC_PDOT, KC_PENT),
+
+ [1] = LAYOUT(
+ _______, _______, _______, 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_DEL, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, KC_UP, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, KC_VOLD, KC_VOLU, KC_MUTE, _______, _______, _______, _______, _______, _______, KC_LEFT, KC_RIGHT, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, KC_DOWN, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, MO(2), _______, _______, _______, _______, _______),
+
+ [2] = LAYOUT(
+ QK_BOOT, NK_TOGG, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______)
+ // clang-format on
+};
diff --git a/keyboards/cipulot/ec1_at/mcuconf.h b/keyboards/cipulot/ec1_at/mcuconf.h
new file mode 100644
index 00000000000..1679d3fbc04
--- /dev/null
+++ b/keyboards/cipulot/ec1_at/mcuconf.h
@@ -0,0 +1,22 @@
+/* Copyright 2024 Cipulot
+ *
+ * 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 3 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_next
+
+#undef STM32_ADC_USE_ADC1
+#define STM32_ADC_USE_ADC1 TRUE
diff --git a/keyboards/cipulot/ec1_at/post_rules.mk b/keyboards/cipulot/ec1_at/post_rules.mk
new file mode 100644
index 00000000000..5dba48cc5fd
--- /dev/null
+++ b/keyboards/cipulot/ec1_at/post_rules.mk
@@ -0,0 +1 @@
+include keyboards/cipulot/common/common_cipulot.mk
diff --git a/keyboards/cipulot/ec1_at/readme.md b/keyboards/cipulot/ec1_at/readme.md
new file mode 100644
index 00000000000..8e2081dae74
--- /dev/null
+++ b/keyboards/cipulot/ec1_at/readme.md
@@ -0,0 +1,26 @@
+# EC1-AT
+
+![EC1-AT](https://i.imgur.com/69OrQsh.png)
+
+EC version of the W1-AT keyboard.
+
+* Keyboard Maintainer: [cipulot](https://github.com/cipulot)
+* Hardware Supported: EC1-AT
+* Hardware Availability: TBD
+
+Make example for this keyboard (after setting up your build environment):
+
+ make cipulot/ec1_at:default
+
+Flashing example for this keyboard:
+
+ make cipulot/ec1_at: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).
+
+## Bootloader
+
+Enter the bootloader in 2 ways:
+
+* **Physical reset**: Long press the button on the back of the PCB
+* **Keycode in layout**: Press the key mapped to `QK_BOOT` if it is available
diff --git a/keyboards/cipulot/ec1_at/rules.mk b/keyboards/cipulot/ec1_at/rules.mk
new file mode 100644
index 00000000000..1716098b3e1
--- /dev/null
+++ b/keyboards/cipulot/ec1_at/rules.mk
@@ -0,0 +1 @@
+OPT = 3