Programmable dummy load.

On July 2, 2013, in Electronics, by Cmc

I have been designing small psu units and got tired of resistor loads. Since I had a nice cpu heatsink I decided to grab some random components at the lab and make a programmable current load.

 

The schematic I am using, is something like this:

Programmable current load sch

 

Of course I could not make something that looks nice. To be honest I actually made something that looks pretty damn bad. But it works.

Testing a psu.

A setup for testing a psu.

Measuring current and output voltage. Everything seems nominal.

This is what my powerbox was doing while psu was under test.

This is what my powerbox was doing while psu was under test.

The powerbox is unable to supply all the current I want it to. I must start thinking about something more beefy.

 

Like something from zombie apocalypse.

Like something from zombie apocalypse.

Almost like a bomb, is it not?

The psu under test.

This is the psu under test. 8-30V in and 24V out.

And here is something pretty. Everything before was very damn ugly :)

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