https://github.com/hkzlab/atnox
ATX to AT/XT/Amiga power supply adapter
https://github.com/hkzlab/atnox
adapter amiga at atx powersupply retrocomputing xt
Last synced: 7 months ago
JSON representation
ATX to AT/XT/Amiga power supply adapter
- Host: GitHub
- URL: https://github.com/hkzlab/atnox
- Owner: hkzlab
- License: cc-by-sa-4.0
- Created: 2020-10-09T18:19:16.000Z (about 5 years ago)
- Default Branch: master
- Last Pushed: 2023-12-09T08:42:31.000Z (almost 2 years ago)
- Last Synced: 2025-02-05T08:36:48.417Z (9 months ago)
- Topics: adapter, amiga, at, atx, powersupply, retrocomputing, xt
- Homepage:
- Size: 15.5 MB
- Stars: 18
- Watchers: 7
- Forks: 1
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: LICENSE.txt
Awesome Lists containing this project
README
# ATnoX
## Introduction
The ATnoX was born out of the necessity for me to have a small adapter adapter I could use to fit AT/XT motherboards into modern cases, powering them with ATX power supplies and turning them on with a momentary switch (the standard power on button present in computer cases built in the last 20+ years).
The [ATX2AT](https://x86.fr/atx2at-smart-converter/) is a wonderful device (I own several of them), but I prefer to use it to test my boards and then fall back onto a cheaper alternative I can close inside a case without it feeling like a waste.
In fact, the output connector uses the same pinout as the ATX2AT, but as I still had a free pin available, I decided to include a **TICK generator**: a 50/60hz square wave signal required by some big-box Amigas to turn on.
## Pinout
14 pin connector, front view.
```text
____
.----.----.----|----|----.----.----.
| 14 | 13 | 12 | 11 | 10 | 9 | 8 |
|----+----+----+----+----+----+----|
| 7 | 6 | 5 | 4 | 3 | 2 | 1 |
'----'----'----'----'----'----'----'
```
1. +12V
2. +5V
3. +5V
4. GND
5. GND
6. TICK (50/60Hz depending on X1)
7. -5V
8. +12V
9. +5V
10. +5V
11. GND
12. GND
13. Power OK signal
14. -12V
## Component list
**TODO**
## Features
- -5v onboard generation via a 7905 regulator
- Momentary button power-on support
- Header for power led in case the motherboard lacks it
- Power on button included on board for bench testing
- Optional amiga Tick generator
- 4 Layer board (middle layers are +5v and GND)
## Credits
- logic-4000 libraries taken from [alexisvl/kicad-schlib](https://github.com/alexisvl/kicad-schlib)
- ATX power-on circuit taken from [skiselev/isa8_backplane](https://github.com/skiselev/isa8_backplane)
- Amiga Tick generator taken from [Aminet](http://aminet.net/package/docs/hard/Mix_and_Tick)
- Thanks to [@A-Small-Mice](https://github.com/A-Small-Mice) for the printable case