If you selected the relays from the output of a demux, then you could arrange to isolate the FIRST button press from any that follow by disabling the demux right after a button is pressed.
This was the small bit of logic I had envisioned way back at the start of the thread. A bit of timing from a 555(started by button press) and a 4-16 demux would select the relay and using complimetary outputs 15 relays would be reset and one would be set.
This was the small bit of logic I had envisioned way back at the start of the thread. A bit of timing from a 555(started by button press) and a 4-16 demux would select the relay and using complimetary outputs 15 relays would be reset and one would be set.