In previous videos we looked at how to build an analogue electronic DC load and also a few different displays that could help with seeing what’s going on
So it has finally come to fruition and I am pleased to show the first build from what we have learned
This unit will handle plenty of load, I have already left it for several hours with 30V and 1.5Amps so 45 Watts, and it was barely above ambient and have also loaded with 60V at 1.5Amps with no ill effects so I have confidence it will perform for most of my desired uses
The display provides 4 digits of remarkably accurate readings for voltage and current and the unit will also handle input from an Arbitrary Waveform Generator (0-5V representing 0-5A) and up to about a 2 - 3 KHz square wave if you so desire.
I will be following up in the near future with a microcontroller based version but for now I at least have a good tool for the LAB that will be very handy for testing power supplies and batteries as well as a few other options I’m sure
Schematics etc. will be posted soon so you can build your own or you can refer to previous videos for more details
The only thing lacking right now is a fan control so slow it down when not running with a big load, this would be nice from a noise perspective but not essential