2 layers66.6 × 41.3 mm
UPIC46
emertcakir/uPIC46
PIC18F46K22-based versatile development board with CAN, RS-485, EEPROM, RTC, and user LEDs
111 parts2MIT
4 layers30.5 × 17.8 mm
Atari usb
jomag/atari-usb1Atari Joystick to USB adapter
- Size
- 30.5 × 17.8 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 38
- Nets
- 38
- Pads
- 128
- Tracks, vias
- 257, 38
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 26 Apr 2020
- Updated
- 11 Jun 2024
Overview
Atari usb is an open-source printed circuit board by jomag, from the jomag/atari-usb repository on GitHub, published under the LGPL-2.1 licence. It is a 4-layer board of 30.5 × 17.8 mm with 38 parts on 38 nets, routed with 257 tracks and 38 vias.
It is built around the ATMEGA32U4-AU, TPD2EUSB30DRT and NX3225GD-8MHZ-STD-CRA-3. Its parts include 15 resistors, 9 capacitors, 5 diodes, 2 ICs and 2 connectors. It belongs with the retro computing and games and keyboards and input boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
3
ATMEGA32U4-AU
QFP-44(10x10)-40℃~+85℃ 10bit 16MHz 1KB 2.5KB 2.7V~5.5V 26 32KB 8 Bit AVR Built-in FLASH QFP-44(10x10) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
TPD2EUSB30DRT
SOT(9x3)-40℃~+85℃ 0.7pF 2 45W 5.5V 5A@8/20us 7V 8V ESD IEC 61000-4-2、IEC 61000-4-5 Unidirectional SOT(9x3) ESD and Surge Protection (TVS/ESD) ROHSTexas InstrumentsESD And Surge Protection (TVS/ESD)
NX3225GD-8MHZ-STD-CRA-3
SMD3225-2P-40℃~+150℃ 500Ω 8MHz 8pF ±150ppm ±50ppm SMD3225-2P Crystals ROHSNDKCrystals
README
README.mdAtari USB
This repo contains the PCB and firmware of an Atari joystick to USB adapter, allowing old, golden joysticks such as TAC-2 to be used with modern computers, or products such as "The C64" that use USB for joysticks.
"The C64" is picky about joysticks, and this firmware has not yet been confirmed to be compatible with it. This will be updated.
Architecture
The adapter is primarily built around an ATmega32u4 with an Arduino bootloader. This allows the firmware to be tweaked and flashed using the standard Arduino IDE. Board type: "Adafruit Feather 32u4".
PCB revisions
Rev 0
Current revision.
Everything works, but the initial bootloader transfer is a bit complicated as it requires temporary soldering an ISP header to a few pads on the board. This will be revisited for rev 1.
Firmware
Current firmware is very simplistic, but it works well. The joystick HID code was copied from Matthew Heironimus.
License
The current release contains code from Matthew Heironimus under the LGPL license, so the entire project is LGPL for now.
Parts
38| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 1k | Resistor_SMD:R_0603_1608Metric | R3, R4, R5, R6, R7, R8, R9, R10 |
| 5 | 0.1u | Capacitor_SMD:C_0603_1608Metric | C5, C6, C7, C8, C9 |
| 5 | 200? | Resistor_SMD:R_0603_1608Metric | R11, R12, R13, R14, R15 |
| 2 | 22 | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 2 | 6p | Capacitor_SMD:C_0603_1608Metric | C1, C2 |
| 1 | 10u? | Capacitor_SMD:C_0805_2012Metric | C3 |
| 1 | 1u | Capacitor_SMD:C_0603_1608Metric | C4 |
| 1 | ATmega32U4-AU | Package_QFP:TQFP-44_10x10mm_P0.8mm | U1 |
| 1 | Button | LED_SMD:LED_0603_1608Metric | D5 |
| 1 | DB9_Male | jomag-connectors:db9-edge-hack | J2 |
| 1 | Down | LED_SMD:LED_0603_1608Metric | D4 |
| 1 | Left | LED_SMD:LED_0603_1608Metric | D1 |
| 1 | MISO | TestPoint:TestPoint_Pad_D1.0mm | TP1 |
| 1 | MOSI | TestPoint:TestPoint_Pad_D1.0mm | TP4 |
| 1 | NX3225GD-8MHZ-STD-CRA-3 | digikey-footprints:SMD-2_3.2x2.5mm | XTAL1 |
| 1 | Right | LED_SMD:LED_0603_1608Metric | D2 |
| 1 | SCK | TestPoint:TestPoint_Pad_D1.0mm | TP3 |
| 1 | TPD2EUSB30 | Package_TO_SOT_SMD:SOT-23 | U2 |
| 1 | USB_A | Connector_USB:USB_A_CNCTech_1001-011-01101_Horizontal | J1 |
| 1 | Up | LED_SMD:LED_0603_1608Metric | D3 |
| 1 | ~RST | TestPoint:TestPoint_Pad_D1.0mm | TP5 |
Questions
How big is the Atari usb PCB?
It measures 30.5 × 17.8 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Atari usb use?
38 parts, built around the ATMEGA32U4-AU, TPD2EUSB30DRT and NX3225GD-8MHZ-STD-CRA-3. 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 Atari usb KiCad files?
From the jomag/atari-usb repository on GitHub, at the commit this page was made from: the board is pcb/atari-usb.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Atari usb design in my own project?
Its repository publishes it under the LGPL-2.1 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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