2 layers116.8 × 30 mm
Type d
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
14 parts3kApache-2.0
2 layers
Solder Keychain
YiruiDai/PCB-keychainThis is a keychain with an LED that flashes with the push of a button!
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 14
- Nets
- 9
- Pads
- 34
- Tracks, vias
- 71, 0
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 29 Jun 2025
- Updated
- 29 Jun 2025
Overview
Solder Keychain is an open-source printed circuit board by YiruiDai, from the YiruiDai/PCB-keychain repository on GitHub. It is a 2-layer board with 14 parts on 9 nets, routed with 71 tracks and 0 vias.
Its parts include 6 resistors, 2 capacitors, 2 transistors, 1 diode and 1 switch.
README
README.mdFlashing Keychain
This is a keychain with an LED that flashes with the push of a button!
Schematic
PCB
BOM
2 Battery holder
2 uF Capacitor
2 NPN Transistor
6 220 Resistor
1 LED
1 Push button
Made by @Yirui on Slack
Parts
14| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2, R3, R4, R5, R6 |
| 2 | 2N3904 | Package_TO_SOT_THT:TO-92_Inline | Q1, Q2 |
| 2 | Battery_Cell | Battery:BatteryHolder_Keystone_3034_1x20mm | BT1, BT2 |
| 2 | C | Capacitor_THT:CP_Radial_D8.0mm_P5.00mm | C1, C2 |
| 1 | LED | LED_THT:LED_D5.0mm | D1 |
| 1 | SW_Push | Button_Switch_THT:SW_PUSH_6mm | SW1 |
Questions
What parts does the Solder Keychain use?
14 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 Solder Keychain KiCad files?
From the YiruiDai/PCB-keychain repository on GitHub, at the commit this page was made from: the board is Solder_Keychain/Solder_Keychain.kicad_pcb and its schematic Solder_Keychain/Solder_Keychain.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Solder Keychain design in my own project?
Its repository states no licence, so its author keeps all rights: ask YiruiDai before reusing the design.
Similar boards
- 2 layers32 × 22 mm
- 2 layers34 × 45 mm
2032Charger
hackclub/OnBoard
💡 Join 1,000 teenagers and make your first PCB with a $100 grant!
14 parts915 - 2 layers34 × 109.9 mm
- 2 layers45.3 × 42.7 mm
- 2 layers42.5 × 28.8 mm
C5VRX JACK DIY
Twotoz/C5VRX
Ultra-minimal, zero-CPU 5.8 GHz analog FPV video receiver using ESP32-C5 Wi-Fi 6 PHY MODEM_DIAG, BitScrambler WBFM demodulation & resistor DAC CVBS
14 parts515GPL-3.0 - 2 layers54 × 47 mm
- 2 layers62 × 24 mm
