Simple analog programmable load

in hacks by DP | 3 comments

Here is a simple programmable load. It’s basically a constant current sink that is controlled through a pot. The current is sunk through a high power FET which needs to be cooled to function properly.

Here’s a link to a *really* simple linear constant current sink i put together

This design is about as simple as it gets. . .multi-turn pot controlled and readout done by a voltmeter:) The good news is that it works quite well for moderate loads. It was put together to regulate current flowing through a copper electroplating tank. Due to the monstrous Pentium II (or maybe III?) heat sink, it isn’t noticeably warm when eating 9A of current.

Via the forum.

This entry was posted in hacks and tagged , .


  1. Drone says:

    Have a look at this EEVblog video from Dave Jones…

    EEVblog #102 – DIY Constant Current Dummy Load for Power Supply and Battery Testing

    Dave’s video deals with heat transfer too. Disclaimer – I’m not affiliated with EEVblog.

  2. Timely! This will be used for my Anodizing System. Thanks!

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