<I swear there were TTL chips which could directly drive (err, well, sink) <Nixie displays, but they aren't specifically called out in the newer Try 7441 binary to decimal nixi driver. And the V++ should be 120-130V with a diode clamp at 90V for std nixis. The lower voltage tube that work at 90-100V you can skip the clamp. I stilll keep a pot load of them, I have test gear (some 25+ years old) that use nixi tubes, such as my Yasu 355 frequency counter. Muxing nixies... can do it but the rules (voltages and rates) are horrid. First of the formed segment types don't mux well at all they are slow. The dot matrix tubes (burroughs self scan) were the most common muxed "neon glow" displays. Allison