A project log for µHVPSU

A small HV DC-DC converter for your average Nixie Tube applications

Frédéric DruppelFrédéric Druppel 09/27/2018 at 21:010 Comments

Okay, I owe some explanations about this project.

For v1.0 of the µHVPSU, I blindly followed an existing schematic of a similar design, that worked (or at least seemed to). So I ordered my PCBs and parts, assembled one, and it didn't work. So I assembled a second one, being extra careful, and it didn't work either. I got so annoyed about it that I decided to shelve this project. Until now !

After hunting on eBay for Nixie tubes, I stumbled on many nixie clock kits and PCBs, with documentation, and most importantly, a schematic. What was really redundant was the use an analog input pin and a PWM output pin of the main µC as the mais DC-DC step-up converter. So I decided to base my new design on one of these schematics.

Here's what I'm talking about :

This particular clock kit uses a PIC microcontroller, which is fine, but it's a bit too much of an overkill for this project.

Instead, I will use an ATTiny44 as they are widely available on eBay at a cheap price (about 6$ for a pack of 10), and they allow me to program them with the Arduino IDE, which I'm already really familiar with ^^ So that gives me a lot more flexibility.

So yeah, that's it for this log ^^ I'll post again when I have something interesting to say, or when all the new components have arrived :)

P.S.: M.daSilva and I have decided to make a spreadsheet, in which all of our Nixie tube types and quantities are listed; we have gathered a total of more that 600 tubes (400+ if you don't count the IN-3's)

I guess we'll have enough to make some interesting projects ^^