This was one of those projects that should have taken an afternoon and ended up as a reasonably large build, however it’s now complete and working rather nicely. It’s also a perfect of example how I sometimes create a piece of test equipment for use with another project I’m working on. In this case I…

So, over the last few evenings I’ve managed to finish the first useful board for my new extendable PSU; a 5v board that can supply around 3 amps. It has a trim control that allows the output to be adjusted from 5v to 6v, and two op-amps wired as voltage comparators that illuminate a couple of…

I’m currently working on a +5v plug-in module for my new PSU (see previous blog post).I had several requirements for this module including the ability to withstand a dead-short circuit and the final output voltage to be trimable to +/- 0.5v. Because of this I decided not to use the existing +5v rail that’s already…