Is there an inexpensive adjustable DC load?

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guy48065

guy48065

Member
2018-09-27 5:20 pm
Where I work we use large MOSFET adjustable DC load controllers to test or drain power supplies and batteries. I'm wondering if anyone knows of a DIY small version that would be useful for testing/conditioning battery packs, providing a fixed load for PS testing/development, etc?

I'm hoping for something with a feedback-based load circuit that will maintain the same current load until the V/A can no longer support it. Something on the order of 10 amps max would be most handy. Anyone already invent this particular wheel?

Hanging strings of lightbulbs off the side of the bench just isn't cutting it anymore.
 
Mark Johnson

Mark Johnson

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Paid Member
2011-05-27 3:27 pm
Silicon Valley
Do some Google searching for Arachnid Labs (UK). They once sold a DC electronic load PCB, with no chassis, called ReLOAD. Maybe it will do what you want.

If you don't mind Chinese low price, low lifetime gear: search for KL283 on eBay. 30 amps with enormous loud fans. Be sure to read the fine print and buy one whose AC mains voltage and plug dimensions, match your country and your lab gear.
 
guy48065

guy48065

Member
2018-09-27 5:20 pm
Wow has this taken me down a rabbit hole of cool cheap gear!
The KL283 is overkill for the power testing I'm looking for but it's led me to some useful palm-sized units rated to sink ~150W which should cover most my needs.

Thank you very much for pointing me in the right direction!
 
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