2 layers237.5 × 102.9 mm
Instruction
jes/scamp-cpu
A homebrew 16-bit CPU with a homebrew Unix-like-ish operating system.
112 parts301Unlicense
2 layers42 × 65 mm
4to2 encoder
minh-vt/4to2_encoder1- Size
- 42 × 65 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 21
- Nets
- 10
- Pads
- 63
- Tracks, vias
- 75, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 12 Mar 2026
- Updated
- 19 Mar 2026
Overview
4to2 encoder is an open-source printed circuit board by minh-vt, from the minh-vt/4to2_encoder repository on GitHub. It is a 2-layer board of 42 × 65 mm with 21 parts on 10 nets, routed with 75 tracks and 0 vias.
It is built around the 74LS00SC. Its parts include 8 resistors, 5 capacitors, 4 switches, 2 diodes and 1 IC.
Main components
1Parts
21| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 10K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3, R4, R5, R6 |
| 4 | 10pF | Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm | C1, C2, C3, C4 |
| 4 | SW_Push | Button_Switch_THT:SW_PUSH-12mm | SW1, SW2, SW3, SW4 |
| 2 | 0 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R7, R8 |
| 2 | 220 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2 |
| 2 | LED3V | LED_THT:LED_D5.0mm | D1, D2 |
| 1 | 100uF | Capacitor_THT:CP_Radial_D6.3mm_P2.50mm | C5 |
| 1 | 74LS00 | Package_DIP:DIP-14_W7.62mm | U1 |
| 1 | Conn_01x02_Pin | Connector:FanPinHeader_1x03_P2.54mm_Vertical | J1 |
Questions
How big is the 4to2 encoder PCB?
It measures 42 × 65 mm and has 2 copper layers, 1.6 mm thick.
What parts does the 4to2 encoder use?
21 parts, built around the 74LS00SC. 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 4to2 encoder KiCad files?
From the minh-vt/4to2_encoder repository on GitHub, at the commit this page was made from: the board is main/main.kicad_pcb and its schematic main/main.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the 4to2 encoder design in my own project?
Its repository states no licence, so its author keeps all rights: ask minh-vt before reusing the design.
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