- direct replacement for Gottlieb MA-644
- LED, no high voltage
- can be dimmed
- no new wiring, thanks to a step-down converter
- optionally powered by internal or external 5V supply
PCB can be preassembled by JLCPCB. You only need to add a few components:
- Radial Elko 470uF/63V
- LED displays. If you want blue LEDs, you need ten displays of type "KEM-394D-AB" "0.39inch 4 digit 16 segment alphanumeric, common cathode", which can be found on Alibaba here. Other colors are available, see pictures below.
In addition add a solder bridge to select powersource. I recommend using the bridge marked with (*) to select the integrated step-down converter.