Hmmm: I don't see why you need opto couplers. The 74141 can directly drive NIXIE pins. The 74141 (based on the original 7441 that was designed specifically for NIXIES) has open collector, zener protected outputs.
Hmmm: I don't see why you need opto couplers. The 74141 can directly drive NIXIE pins. The 74141 (based on the original 7441 that was designed specifically for NIXIES) has open collector, zener protected outputs.