2 layers70 × 35 mm
2 layers74.5 × 63 mm
Solder proj
picafe/solder-projmade by @Surya on slack for https://solder.hackclub.com \ PCB art (of Cyan and Lina) taken from CyanNyan6's Twitter and Hackclub assets
- Size
- 74.5 × 63 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 41
- Nets
- 27
- Pads
- 96
- Tracks, vias
- 132, 4
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 27 May 2025
- Updated
- 4 Jun 2025
Overview
Solder proj is an open-source printed circuit board by picafe, from the picafe/solder-proj repository on GitHub. It is a 2-layer board of 74.5 × 63 mm with 41 parts on 27 nets, routed with 132 tracks and 4 vias.
Its parts include 13 resistors, 8 transistors, 8 switches, 4 diodes and 1 connector.
README
README.mdhackclub solder project
a pretty simple PCB showcasing the 4 logic gates that are pretty easy to make with transistors (AND, OR, NAND, NOR).
Schematic
PCB
Bill of Materials
| Reference | Qty | Value | Footprint | Datasheet |
|---|---|---|---|---|
| D1,D2,D3,D4 | 4 | LED | LED_THT:LED_D5.0mm | ~ |
| J2 | 1 | Conn_01x03_Pin | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | ~ |
| Q1,Q2,Q3,Q4,Q5,Q6,Q7,Q8 | 8 | 2N3904 | Package_TO_SOT_THT:TO-92_Inline | 2N3904 Datasheet |
| R1,R2,R4,R5,R7,R8,R10,R11 | 8 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | ~ |
| R3,R6,R9,R12 | 4 | 330 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | ~ |
| R13 | 1 | 4.7k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | ~ |
| SW1,SW2,SW3,SW4,SW5,SW6,SW7,SW8 | 8 | SW_Push | Button_Switch_THT:SW_PUSH_6mm | ~ |
| TP1,TP2 | 2 | TestPoint | TestPoint:TestPoint_Pad_2.5x2.5mm | ~ |
made by @Surya on slack for https://solder.hackclub.com
PCB art (of Cyan and Lina) taken from CyanNyan6's Twitter and Hackclub assets
Parts
41| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2, R4, R5, R7, R8, R10, R11 |
| 8 | 2N3904 | Package_TO_SOT_THT:TO-92_Inline | Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 |
| 8 | SW_Push | Button_Switch_THT:SW_PUSH_6mm | SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 |
| 4 | 330 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3, R6, R9, R12 |
| 4 | LED | LED_THT:LED_D5.0mm | D1, D2, D3, D4 |
| 4 | LOGO | LOGO | G***, G***, G***, G*** |
| 2 | TestPoint | TestPoint:TestPoint_Pad_2.5x2.5mm | TP1, TP2 |
| 1 | |||
| 1 | 4.7k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R13 |
| 1 | Conn_01x03_Pin | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J2 |
Questions
How big is the Solder proj PCB?
It measures 74.5 × 63 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Solder proj use?
41 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 proj KiCad files?
From the picafe/solder-proj repository on GitHub, at the commit this page was made from: the board is solder-proj.kicad_pcb and its schematic solder-proj.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Solder proj design in my own project?
Its repository states no licence, so its author keeps all rights: ask picafe before reusing the design.
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