Clock
About the Clock PCB
Clock is an open source ESP32 PCB design by themkoi, published on GitHub. It is a 2-layer board measuring 66 × 42 mm, with 55 components from 33 distinct parts.
Its main chip is the ESP32-WROOM-E, from the ESP32 family. Other key parts include the TPS2116DRL, MCP73811T-420I-OT and TLV75533PDBV. By type, the board carries 15 connectors, 12 resistors, 11 capacitors, 6 ICs, 2 transistors and 2 switches.
Main components on the Clock
Clock bill of materials (BOM)
55 components, 33 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ESP32-WROOM-E | ESP32-WROOM-32E | U1 |
| 1 | ~ | SOT95P280X140-6N | U2 |
| 1 | ~ | SHDR2W64P0X250_1X2_740X575X700P | U3 |
| 1 | TPS2116DRL | SOT-583-8 | U4 |
| 1 | MCP73811T-420I-OT | SOT-23-5 | U5 |
| 1 | TLV75533PDBV | SOT-23-5 | U7 |
| 1 | FS8205A | SOP65P640X120-8N | Q1 |
| 1 | FDN304PZ | SOT-23 | Q2 |
| 1 | Conn_01x03_Pin | PinHeader_1x03_P2.54mm_Vertical | J1 |
| 1 | oled | SSD1306_0.96_Oled | J2 |
| 1 | Led display | tm1637_module | J3 |
| 1 | Led display 2 | PinHeader_1x04_P2.54mm_Vertical | J4 |
| 2 | Conn_01x07_Socket | PinSocket_1x07_P2.54mm_Vertical | J5, J6 |
| 7 | Conn_01x01_Socket | PinSocket_1x01_P2.54mm_Vertical | J7, J9, J10, J11, J12, J13, J14 |
| 2 | Conn_01x02_Socket | PinSocket_1x02_P2.54mm_Vertical | J8, J15 |
| 1 | ~ | SOIC-8_3.9x4.9mm_P1.27mm | AO9926C1 |
| 3 | TL3305AF160QG | TL3305AF160QG | BATT_P1, BOOT1, EN1 |
| 2 | B3F-5050 | B3F-4055 | S3, S4 |
| 1 | Conn_01x02_Socket | SHDR2W64P0X250_1X2_740X575X700P | USB_BOARD1 |
| 2 | SD0805S040S0R5 | D_0805_2012Metric | D3, D4 |
Show 13 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 22uF | C_0805_2012Metric | C1 |
| 3 | 0.1uF | C_0603_1608Metric | C2, C3, C4 |
| 1 | 100uF | CP_Radial_D5.0mm_P2.50mm | C5 |
| 6 | 1uF | C_0603_1608Metric | C6, C7, C8, C9, C10, C11 |
| 2 | 10K | R_0402_1005Metric | R1, R6 |
| 1 | 300k | R_0402_1005Metric | R2 |
| 2 | 800k | R_0402_1005Metric | R3, R10 |
| 1 | 330R | R_0402_1005Metric | R4 |
| 1 | 2.7K | R_0402_1005Metric | R5 |
| 1 | 500k | R_0402_1005Metric | R7 |
| 1 | 100K | R_0402_1005Metric | R8 |
| 1 | 50k | R_0402_1005Metric | R9 |
| 2 | 5.1k | R_0402_1005Metric | R11, R12 |
Clock design files
The KiCad project lives in the themkoi/esp32-alarm-clock repository on GitHub; these links point at the commit this page was built from.
- Layoutclock-pcb/clock-pcb.kicad_pcb
- Schematicclock-pcb/clock-pcb.kicad_sch
Clock: common questions
What microcontroller does the Clock use?
The Clock is built around the ESP32-WROOM-E, from the ESP32 family.
How big is the Clock PCB?
The Clock measures 66 × 42 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Clock?
55 components, from 33 distinct parts. The full bill of materials is listed on this page.
Where can I download the Clock design files?
From the themkoi/esp32-alarm-clock repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Clock design in my own project?
The repository has no license, so all rights stay with themkoi. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Clock without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.
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