Atari Amiga C64 SNES NES to USB Adapter
The circuit is based on Raphnet's work: http://www.raphnet.net/electronique/atari_usb/
Firmware version 1.9 is downloadable there.
Green squares are vias.
Schematics, Firmware & Eagle Files
Schematic pdf File:Nes snes db9 usb-1.9-schematics.pdf
Firmware and Eagle File:Nes snes db9 usb-1.9.zip
In the eagle files you'll find 3 versions: SMD version, DIP version, DIP version with PADS for usb (instead of mini-usb socket).
Parts
| Part | Quantity | Value | Package |
|---|---|---|---|
| C1,C2 | 2 | 27pF | 1206 |
| C3 | 1 | 10uF | PANASONIC_B |
| C4 | 1 | 100n | 1206 |
| CC_TEXT1 | 1 | CREATIVE_COMMONS | CREATIVE_COMMONS |
| IC1 | 1 | MEGA8-AI | TQFP32-08 |
| J1 | 1 | AVR_SPI_PRG_6OFFSET_PADS | 2X3_OFFSET |
| JP1,JP2 | 2 | M02LOCK_LONGPADS | 1X02_LOCK_LONGPADS |
| JP4 | 1 | 1X07 | |
| LOGO1 | 1 | OSHW-LOGOL | OSHW-LOGO-L |
| R1 | 1 | 1.5k | 1206 |
| R2,R3 | 2 | 68 | 1206 |
| U$1 | 1 | USB-MINIB-5PIN | USB-MINIB |
| U$2,U$3 | 2 | 3.6V | SOD80C |
| X1 | 1 | DB9_MALE | |
| Y1 | 1 | 12MHz | HC49UP |