2 layers24.1 × 56.9 mm
2 layers37.2 × 31.2 mm
DeathClock
EmileBV/DeathClockThis project's goal to make a pocket "watch" that will last and run as long as possible and count down to a set date/time.
- Size
- 37.2 × 31.2 mm
- Copper layers
- 2
- Thickness
- 1 mm
- Parts
- 32
- Nets
- 38
- Pads
- 111
- Tracks, vias
- 191, 50
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 9 Oct 2022
- Updated
- 6 Apr 2025
Overview
DeathClock is an open-source printed circuit board by EmileBV, from the EmileBV/DeathClock repository on GitHub. It is a 2-layer board of 37.2 × 31.2 mm with 32 parts on 38 nets, routed with 191 tracks and 50 vias.
It is built around the STM32L010F4P6, SS2040FL and PJA3430_R1_00001, with the PJA3431_R1_00001 among its other parts. Its parts include 16 capacitors, 4 resistors, 3 diodes, 2 transistors and 2 connectors. It belongs with the lEDs and displays boards and the STM32 boards of this library.
Main components
4
STM32L010F4P6
TSSOP-20-169mil-40℃~+85℃ 1.8V~3.6V 128Byte 12bit 16 16KB 2KB 32 Bit 32MHz ARM Cortex-M0+ Built-in FLASH TSSOP-20 Microcontrollers (MCU/MPU/SOC) ROHSSTMicroelectronicsMicrocontrollers (MCU/MPU/SOC)
SS2040FL
SOD-123FLSOD-123FL Schottky Diodes ROHSFUXINSEMISchottky Diodes
PJA3430_R1_00001
SOT-23-55℃~+150℃ 1 N-channel 1.25W 1.8nC@4.5V 1V 20V 2A 400mΩ@1.8V 9.1pF 92pF N-Channel SOT-23 MOSFETs ROHSPANJIT InternationalMOSFETsPJA3431_R1_00001
SOT-23MOSFETsPANJIT International
README
README.mdDeathClock
This project's goal to make a pocket "watch" that will last and run as long as possible and count down to a set date/time. Using an E-Paper display that will be updated maybe twice per day and a STM32L010xx MCU running on its internal low power clock to achieve very long runtime on a CR2430 coin cell.
This project is still in its very early stages right now, don't expect too much.
Parts
32| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 1uF / 25V | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C4, C5, C6, C7, C8, C9, C10 |
| 3 | SS2040FL | Diode_SMD:D_SOD-123F | D1, D2, D3 |
| 2 | 0.1uF | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C14, C16 |
| 2 | 1uF | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C13, C15 |
| 2 | 6pF | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C11, C12 |
| 1 | 0.1uF / 16V | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C1 |
| 1 | 0.1uF / 6.3V | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C2 |
| 1 | 0.47R | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R1 |
| 1 | 1 | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R2 |
| 1 | 100k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R4 |
| 1 | 10k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R3 |
| 1 | 10uH ±20% 0.8A 1276AS-H-100M=P2 | Inductor_SMD:L_1210_3225Metric_Pad1.42x2.65mm_HandSolder | L1 |
| 1 | 4.7uF / 25V | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C3 |
| 1 | AdamTech_CR2430_BH-109B-5 | CoinCellHolder:AdamTech_CR2430_BH-109B-5_num_pads | BAT1 |
| 1 | Conn_01x05_Female | Connector_PinHeader_1.27mm:PinHeader_1x05_P1.27mm_Vertical | J1 |
| 1 | Crystal | Crystal:Crystal_SMD_2012-2Pin_2.0x1.2mm_HandSoldering | Y1 |
| 1 | EDP_24pin_conn FFC2B35-24-T | FFC2B35-24-T:FFC2B35-24-T | J2 |
| 1 | LOGO | LOGO | G*** |
| 1 | PJA3430_R1_00001 | Package_TO_SOT_SMD:SOT-23 | Q2 |
| 1 | PJA3431_R1_00001 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | STM32L010F4P6 | MCU_STM32L010xx:TSSOP20 | U1 |
Questions
How big is the DeathClock PCB?
It measures 37.2 × 31.2 mm and has 2 copper layers, 1 mm thick.
What parts does the DeathClock use?
32 parts, built around the STM32L010F4P6, SS2040FL, PJA3430_R1_00001 and PJA3431_R1_00001. 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 DeathClock KiCad files?
From the EmileBV/DeathClock repository on GitHub, at the commit this page was made from: the board is PCB/DeathClock/DeathClock.kicad_pcb and its schematic PCB/DeathClock/DeathClock.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the DeathClock design in my own project?
Its repository states no licence, so its author keeps all rights: ask EmileBV before reusing the design.
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