2 layers23.1 × 20.7 mm
Pointify
luftaquila/pointify
DIY retro analog gauges for real-time system and Claude usage monitoring
13 parts42GPL-3.0
2 layers54 × 22 mm
Cpu programmer
procks/eater-8bit-cpu-programmer4Programmer for Ben Eater 8-bit computer
- Size
- 54 × 22 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 14
- Nets
- 24
- Pads
- 76
- Tracks, vias
- 269, 5
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 26 Jun 2025
- Updated
- 29 Jun 2025
Overview
Cpu programmer is an open-source printed circuit board by procks, from the procks/eater-8bit-cpu-programmer repository on GitHub, published under the MIT licence. It is a 2-layer board of 54 × 22 mm with 14 parts on 24 nets, routed with 269 tracks and 5 vias.
It is built around the CH32X033F8P6. Its parts include 4 resistors, 2 capacitors, 2 diodes, 2 connectors and 2 switches. It belongs with the interfaces and adapters boards of this library.
Main components
1README
README.mdeater-8bit-cpu-programmer
Programmer for Ben Eater 8-bit computer
The programmer has 4 sample programs that can be selected with a button. It also allows programming via a serial terminal. it's used cheap CH32X033F8P6 microcontroller.
Data, Address and Write directly connected to DIP switches and Write button. For programming, all DIP switches must be set to the up position (If it's not the LED will light up) and the CPU must be in programming mode. Then press the left button.
Pre-programmed samples:
- Fibonacci
- Double
- FizzBuzz prints each number 1 to 255, printing 0 if the number is divisible by 3 and printing 255 if the number is divisible by 5 (required additional instructions)
- Counts up to 255 and then counts down to 0
Also, a prime number generation program can be added with a 6-step modification, see reddit post.
Parts
14| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 1k | Resistor_SMD:R_0603_1608Metric | R4, R5 |
| 2 | LED | LED_SMD:LED_0603_1608Metric | D1, D2 |
| 1 | 0 | Resistor_SMD:R_1206_3216Metric | R2 |
| 1 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C8 |
| 1 | 1uF | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | 4k7 | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | Boot | Button4Pin:SW_Push_1P1T_NO_Vertical_4Pins | SW1 |
| 1 | CH32X033F8P6 | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U1 |
| 1 | Conn_01x04_Socket | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical | J2 |
| 1 | Conn_01x15_Socket | Connector_PinHeader_2.54mm:PinHeader_1x15_P2.54mm_Vertical | J1 |
| 1 | USB_B_Micro | Connector_USB:USB_Micro-B_Molex-105017-0001 | USB1 |
| 1 | Write | Button4Pin:SW_Push_1P1T_NO_Vertical_4Pins | SW2 |
Questions
How big is the Cpu programmer PCB?
It measures 54 × 22 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Cpu programmer use?
14 parts, built around the CH32X033F8P6. 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 Cpu programmer KiCad files?
From the procks/eater-8bit-cpu-programmer repository on GitHub, at the commit this page was made from: the board is hardware/cpu-programmer/cpu-programmer.kicad_pcb and its schematic hardware/cpu-programmer/cpu-programmer.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Cpu programmer design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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