Assorted power supplies? I knocked together this module over the last week, about:
![](https://www.seventransistorlabs.com/Images/DCDC_800V.jpg)
12V input, 150-800V output, about 50W capacity. UC3843 based flyback (the two transistors are in parallel, and the output is +/- flyback, ground referenced for + output only).
Cutesy kits? Learning projects? Oscillator, timer, amplifier, counter, wire up an MCU, sensor, IoT thing, what catches your fancy?
![Wink ;)](https://www.eevblog.com/forum/Smileys/default/xwink.gif.pagespeed.ic.cldandycH0.png)
Tim