Monthly Archives: July 2013

The real deal

Time to build up the circuit idea from the last post on a breadboard. I decided to use an LM317 and a LM2670. These are both fairly easy to get, inexpensive and available in a TO220 package.  There are multiple versions of the LM2670, for this application the –adj version is needed. The schematic is […]

Power supply ideas

Time for the first actual blog. I’m working on a lab power supply at the moment and I’d like it to be efficient but still low noise. The best way to make an efficient power supply is a switch mode power supply or SMPS. Making one with a variable output voltage is not too hard. […]