Recommended · for some experience
EEVblog #102 - DIY Constant Current Dummy Load for Power Supply and Battery Testing
Why people recommend it
Dave Jones builds a constant current dummy load from an op-amp, MOSFET and shunt resistor for testing supplies and batteries; a common starting design for DIY loads.
In their words
The circuit I’m working on is based on EEVBlog's dummy load.
user1022934 on electronics.stackexchange.com, Nov 2016. CC BY-SA.
Here is the EEVblog #102 - DIY Constant Current Dummy Load for Power Supply and Battery Testing.
abdullah kahraman on electronics.stackexchange.com, Dec 2011. CC BY-SA.
I built pretty much the simplest dummy load for testing batteries I found on youtube (EEVBlog #102) , but I modified it little bit.
Jakub on electronics.stackexchange.com, Jul 2018. CC BY-SA.