I just noticed the TENMA 72-8690A. It’s only about $10 more than the one I posted earlier and has dual output. Unfortunately, it doesn’t appear you can chain them like the one Dave mentioned earlier. Also, this one only as two decimal places on the display.
I saw those and wondered why that would be beneficial. What sort of scenario would require a programmable power supply? Is that for testing surge or dirty power conditions?
I’ve been looking at the Rigol models as well, but just can’t justify it right now. I don’t need timed outputs, waveforms, or the other digital-PS tricks. I think I’ll settle for one of the Dr-Meter triple-output linear supplies, that run about $200 (unless someone here has had bad experiences with them). They seem to do all the necessary analog tricks (series, parallel, etc) for just a few bucks more than a single-output unit.
The triple types will be ideal for most work. I have 2 of them as it is.
The reason for the programmable is for testing automotive designs where you can simulate the voltage drop of cranking and the higher voltage when the battery is charging etc. That would be the main reason for that type for me.
I use a waveform generator for testing and calibrating ADC inputs.