2 layers60 × 30 mm
Controller
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
11 parts3kApache-2.0
2 layers80.5 × 52 mm
Desk clock
paco7828/MedboxBattery-powered time-locked box driven by an ESP32-C3 Supermini. It functions as an interactive alarm clock that uses a servo motor to automatically open at a specific time.
- Size
- 80.5 × 52 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 11
- Nets
- 33
- Pads
- 67
- Tracks, vias
- 182, 15
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 19 Oct 2024
- Updated
- 11 Aug 2026
Overview
Desk clock is an open-source printed circuit board by paco7828, from the paco7828/Medbox repository on GitHub. It is a 2-layer board of 80.5 × 52 mm with 11 parts on 33 nets, routed with 182 tracks and 15 vias.
Its parts include 2 resistors and 2 connectors. It belongs with the lEDs and displays boards and the AVR (ATmega, ATtiny) boards of this library.
README
README.mdTimed Box
Battery-powered time-locked box driven by an ESP32-C3 Supermini. It functions as an interactive alarm clock that uses a servo motor to automatically open at a specific time. It utilizes deep sleep mode to preserve battery life when not actively in use.
Features
- Time-Triggered Lockbox: Automatically triggers a servo to open the box when the programmed alarm goes off. The box automatically closes after 30 seconds.
- Ultra-Low Power Mode: Enters deep sleep after 60 seconds of inactivity. Automatically wakes up exactly when the alarm is due or via a manual button press.
- 1.8" TFT Display: Shows real-time clock, date, day of the week, and current alarm status with optimized rendering.
- Precision Timekeeping: Uses a DS3231M RTC circuit to maintain accurate time independently of the MCU.
- Audio Feedback: Integrated buzzer plays alarm sequences and button interaction sounds.
- Manual Override: Long-pressing the main button allows you to manually open or close the box at any time without an alarm.
- On-Device Configuration: Two physical buttons to toggle the alarm state, configure the alarm time, and wake the device from sleep. Alarm times are saved in non-volatile memory.
- Integrated Power Management: Runs on a 3.7V LiPo battery. Includes a built-in USB-C charging circuit with battery protection and a boost converter for 5V components.
Hardware Components
- MCU: ESP32-C3 SUPERMINI
- RTC: DS3231M
- Display: 1.8" TFT Screen (ST7735)
- Actuator: Servo Motor
- Audio: Active Buzzer
- Power System: 3.7V LiPo Battery, TP4056 Battery Charger / Protection module (with 8205A & DW01A), MT3608 Step-up Converter (3.7V -> 5V)
- Inputs: 2x Tactile Push Buttons, Power Switch
Parts
11| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2 |
| 2 | SW_Push | Button_Switch_THT:SW_Push_2P1T_Toggle_CK_PVA1xxH1xxxxxxV2 | backBtn1, confirmBtn1 |
| 1 | 1.8"TFT-screen-socket | Connector_PinSocket_2.54mm:PinSocket_1x08_P2.54mm_Vertical | J2 |
| 1 | Arduino_Nano_v3.x | Module:Arduino_Nano | A1 |
| 1 | Buzzer | Buzzer_Beeper:Buzzer_TDK_PS1240P02BT_D12.2mm_H6.5mm | BZ1 |
| 1 | Motor_Servo | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | M1 |
| 1 | Potmeter-10k | Potentiometer_THT:Potentiometer_Piher_PC-16_Single_Vertical | RV1 |
| 1 | RTC-module | Connector_PinSocket_2.54mm:PinSocket_1x06_P2.54mm_Vertical | J3 |
| 1 | SW_SPST | Connector_PinSocket_2.54mm:PinSocket_1x03_P2.54mm_Vertical | Toggle-switch1 |
Questions
How big is the Desk clock PCB?
It measures 80.5 × 52 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Desk clock use?
11 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Desk clock KiCad files?
From the paco7828/Medbox repository on GitHub, at the commit this page was made from: the board is v1/kicad-plan/desk-clock.kicad_pcb and its schematic v1/kicad-plan/desk-clock.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Desk clock design in my own project?
Its repository states no licence, so its author keeps all rights: ask paco7828 before reusing the design.
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