2 layers65 × 30 mm
Rgb to hdmi
hoglet67/RGBtoHDMI
Bare-metal Raspberry Pi project that provides pixel-perfect sampling of Retro Computer RGB/YUV video and conversion to HDMI
36 parts1kGPL-3.0
2 layers72.8 × 54.1 mm
Vga i2c
tomverbeure/vga_i2c8VGA I2C GPIO + Atari 2600 Joystick Extender
- Size
- 72.8 × 54.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 36
- Nets
- 45
- Pads
- 178
- Tracks, vias
- 505, 24
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 10 Jan 2019
- Updated
- 8 Feb 2019
Overview
Vga i2c is an open-source printed circuit board by tomverbeure, from the tomverbeure/vga_i2c repository on GitHub. It is a 2-layer board of 72.8 × 54.1 mm with 36 parts on 45 nets, routed with 505 tracks and 24 vias.
Its parts include 19 resistors, 8 connectors, 4 switches, 2 capacitors and 2 diodes.
README
README.mdVGA I2C GPIO + Atari 2600 Joystick Extender
A detailed write-up about this project can be found here.
The Pano Logic G1 doesn't have an easy way to add GPIOs or non-USB input devices.
If you want to control a game like PacMan with a joystick, you need to be creative. One way to do that is by soldering some wires to connect unused VGA pins to the FPGA as demonstrated by the Pano Man project.
But only allow for a lot of buttons. The Pano Man README suggested connecting a GPIO I2C expander to the I2C wires of the VGA cable.
This project does exactly that!
It's a VGA to VGA feedthru board that taps the I2C wires, adds an I2C GPIO expander, connects it to 2 Atari 2600 joystick ports, 4 additional switches and 2 LEDs.
I shared the schematics of this board with Skip, the author of Pano Man, and he made a version that supports this board!
The design is very simple and it was the perfect project to learn KiCAD and design and send out for production my first PCB.
The schematic:
The PCB layout:
The result:
Parts
36| Qty | Value | Footprint | References |
|---|---|---|---|
| 15 | 10K | Resistors_SMD:R_0603_HandSoldering | R3, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19 |
| 4 | SW_Push | Buttons_Switches_ThroughHole:SW_PUSH_6mm | SW1, SW2, SW3, SW4 |
| 2 | 330 | Resistors_SMD:R_0603_HandSoldering | R4, R5 |
| 2 | Atari 2600 Joystick DB9 | 1-1634580-2:TE_1-1634580-2 | J5, J6 |
| 2 | C | Capacitors_SMD:C_0603_HandSoldering | C1, C2 |
| 2 | Conn_01x09 | Pin_Headers:Pin_Header_Straight_1x09_Pitch2.54mm | J7, J8 |
| 2 | LED | LEDs:LED_0805_HandSoldering | D1, D2 |
| 2 | NS | Resistors_SMD:R_0603_HandSoldering | R1, R2 |
| 2 | VGA DB15 Female | 181-015-213R561:NORCOMP_181-015-213R561 | J1, J2 |
| 1 | Conn_01x06 | Pin_Headers:Pin_Header_Straight_1x06_Pitch2.54mm | J3 |
| 1 | Jumpers | Pin_Headers:Pin_Header_Straight_2x04_Pitch2.54mm | J4 |
| 1 | MCP23017_SO | Housings_SOIC:SOIC-28W_7.5x18.7mm_Pitch1.27mm | U1 |
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Questions
How big is the Vga i2c PCB?
It measures 72.8 × 54.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Vga i2c use?
36 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 Vga i2c KiCad files?
From the tomverbeure/vga_i2c repository on GitHub, at the commit this page was made from: the board is vga_i2c.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Vga i2c design in my own project?
Its repository states no licence, so its author keeps all rights: ask tomverbeure before reusing the design.