Now that I have a proper power supply, I can start building proper lab equipment and the first thing I set out to build was a Time to Digital Converter (TDC). Well, it’s really just a stop watch with microsecond resolution, but TDC sounds much fancier. 😉

And here it is:

Now, how does this thing work?

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What is the most basic ingredient you need, to dabble in hobby electronics?


For years I got mine by tapping an old AT-PSU with crocodile clips. It worked, but the unused cables were always in the way and the clips weren’t exactly the most fit connections for a power supply. So I decided to clean up my table, put the PSU into a nice case and — while I’m on it — include a variable voltage source.

I designed the case with QCAD LibreCAD, gave some finishing touches with Inkscape and had it produced by Formulor, the German Ponoko.

This is the result of my efforts:

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