Re: [DIYbio] A simple and cheap >100V DIY electrophoresis power supply

Here's an older article that does exactly that: dimmer + fuse + rectifier = 120VDC variable power supply for $20:

http://www.science-projects.com/PowerSupply.htm

As you mentioned, this is horribly unsafe, but it does work. One upgrade would be to add an isolation transformer. Or better: get a 110->220V travel transformer (or a 220->110V one, and reverse it), so you get isolation from the mains *and* voltages up to 22VDC.

Patrik

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