This is a fork of the MHzDisplayBlaster by Scrap Computing https://github.com/scrapcomputing/MHzDisplayBlaster
It has been reworked to clone a ST-6A style display board, particularly designed for a Baby AT style case. This case badged as a Gecco was likely the name of the company that built the computer and not the case. This display board is not a perfect match to a ST-6A display, but was the closest I could identify to the style. It will likely need to be modified for your particular case use.
This video shows assembly of the original MHzDisplayBlaster, which is a similar build process.
- Video showing the assembly of rev.0.1 PCB: https://www.youtube.com/watch?v=a4iVehn7APU
- Each segment of the 7-segment display is configured individually with a jumper
- Each segment corresponds to a pin in the configuration headers
- You can short that pin with one of the neighboring state pins (forming a
Tshape) to set its state, which can be one of the following:- ON when Turbo switch is OFF (jumper to position 1)
- ON when Turbo switch is ON (jumper to position 2)
- Always ON (jumper to position 3)
- Always OFF (no jumper)
Gerber files are published in the releases: https://github.com/skadarnold/MHzDisplayBlaster/releases
| Reference | Quantity | Value | Footprint/Comments |
|---|---|---|---|
| U1 | 1 | (e.g., LTD-6440G) | 18-DIP (0.600", 15.24mm distance between top and bottom row pins) 2-Digit 7-Segment Display Common Cathode 0.56" Red |
| J1 J2 | 2 | Conn_02x15 | Connector Male PinHeader 2x15 P2.54mm Vertical |
| J4 | 1 | Conn_01x06 | Connector Male PinHeader 1x06 P2.54mm Vertical |
| R1 | 1 | >= 39 Ohm (100 Ohms recommended) | 3.6 x 1.6mm 1/4 Watt resistor. |
| R2 R3 | 2 | 330 - 1k Ohm | 3.6 x 1.6mm 1/4 Watt resistor. |
| U2 | 1 | 74LS04 ( SN7404DR ) | SOIC-14 |
| Jumpers | 5 | 2.54mm pitch jumpers |