Any kit suitable for a 1-digit nixie clock for a Rodan CD-47?

[Dekatron42]

I just got my hands on my first Rodan CD-47 and wonder if there is any 1-digit kit available that will be able to drive this monster Nixie?

I've googled some but only found kits for smaller Nixies.

/Martin

[Richard Scales]

I see that the cathode current is around 25mA (this will vary depending on what digit you illuminate) so any kit that uses an HV5xxx driver from Microchip will work for sure as it can sink 100mA.

Of course you would need to have a special 'socket' for it to match the tube base. 

I have a one-tube clock that uses 74595's coupled to MPSA42's which are rated at 500mA so they should also be good.

Again, a different tube base but totally do-able. The easiest thing might be to source a B12A tube socket and then have the driver board of whatever clock you choose to me modified to accept the B12A socket.
What would be even easier would be to make an adapter board that plugged into a Z568 Socket which then had the B12A socket on it - super easy.

That's what I would do. If I got anything wrong about the current values then please let me know - I am keen to learn - I've never had hands on one of these tubes to try.

 - Richard

[Richard Scales]

... and if it were my tube I would make sure that whatever kit I used had PIR activation so the tube did not run any longer than it needed to and I would make the B12A socket/adapter board wide with fixings on so that is what held the tube in place, the inexpensive clock part can hang underneath!

I also made a glaring omission in that the CD47 would like a much higher anode voltage - 250V min so make sure that whatever kit you use has an HV supply that can be tweaked to that voltage.

 - Richard

[Nicholas Stock]

Paul did this handsomely...

https://www.nixies.us/clocks/cd47-one-tube-clock/

Nick

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[Richard Scales]

+1 on the Paul Andrews version.

- Richard

[Dekatron42]

Thanks for the comments!

Yes, Paul's single CD47 clock is the only one that I've found with a nice description of how it was built so far. I'll have a deeper look at his design

I thought some about the buckshot Paul used and also the power supply needs and thought it might be a good idea to use a toroidal transformer as both a weight and and easy way to get enough voltage, the combination of a switching power supply and a big wall wart might draw as much power (without having done any calculations) and I'll be moving the weight where it is needed skipping the buck shot.

/Martin