Low cost 5101 Adapter

This Adapter is using a cheap PIC, a Diode and a capacitor, that's it!

The program use the internal RAM and EEPROM of the PIC. The capacitor and the Diode are necessary to give the PIC enough time to save the RAM Content to the EEPROM after switching of the pinball machine.

No backup battery needed anymore!

The Adapter does only work with Bally and Stern MPUs (in Bally compatibilty mode) produced between 1977 and 1985!

Bild in Lightbox öffnen (open image in lightbox). as the diode is placed under the IC socket for the PIC, you need to start soldering with the diode
Bild in Lightbox öffnen (open image in lightbox). next place the adapter pins and the IC socket. Best to put the adapter pins into an old socket for exact soldering.
Bild in Lightbox öffnen (open image in lightbox). the adapter pins are a bit weak, so take care!