Hi Peter, For my vfd clock project (https://github.com/davidmpye/VFD), I used the following high side driver ICs (I used one per tube but of course I could've multiplexed)
They are either known as UDN2981 and there's also a Toshiba version (TDSsomething). They aren't BCD though - just one pin per segment, so that might not be any good for your application depending on how many IO pins you have spare .. David On Sat, 30 Jan 2021, 00:57 peter bunge, <[email protected]> wrote: > I need to drive a single IV12 vacuum fluorescent display from a BCD to 7 > segment chip. > I could use level shifters like the CD40109B or CD4504B but they don't > have 7 devices in one chip (4 and 6) and only drive 18 volts which might > work. > I could use a ULN2803 transistor array with 7 pullup resistors on the > outputs. The problem is the BCD to 7 decoders (e.g. CD4511) are usually > active high, which I need, but the ULN2803 is an inverter which I don't > need. A CD4543B might work as the BCD to 7 and can be selected for inverted > outputs but it is designed for LCDs not driving transistors. > The 74LS47 has the right polarity to drive the transistor array but it > has open collector outputs so 7 more resistors are required. > Any suggestions that don't get even more complicated (shift registers, > octal inverters, arduinos, etc) > I'm looking for a convenient driver chip. > > -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/272c6223-da83-44e2-b180-dfb3bc46b40en%40googlegroups.com > <https://groups.google.com/d/msgid/neonixie-l/272c6223-da83-44e2-b180-dfb3bc46b40en%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/CAOQ6x0G4aQbJt3BHbcZCi7qFZ971SyYfDCdw-UZfOPiFB4GXZQ%40mail.gmail.com.
