Req: someboboy has controlled a thermal printhead with a processor

A long, long time ago, before processors were common place, it was not unusual to build complete circuits out of a mythical technology referred to as TTL. It was amazing, but could be difficult to modify.
I made an Amino Acid synthesizer out of a teletype and TTL in the olden days. Talk about "could be difficult to modify"
Later (when that became economically feasible) I made it minicomputer controlled.
I left the chemical analysis equipment area before micros became abundant, but would guess that todays model is microcontroller driven.

Erik

A long, long time ago, before processors were common place, it was not unusual to build complete circuits out of a mythical technology referred to as TTL. It was amazing, but could be difficult to modify.
I made an Amino Acid synthesizer out of a teletype and TTL in the olden days. Talk about "could be difficult to modify"
Later (when that became economically feasible) I made it minicomputer controlled.
I left the chemical analysis equipment area before micros became abundant, but would guess that todays model is microcontroller driven.

Erik