I made this DC electronic load for testing some power supplies or measuring capacity of batteries. It sinks constant current regulated from 0 to 6 Amps (90W max), so it’s ideal for discharing lead acid batteries with current C/20.
Music: Ahrix – Nova [NCS Release] https://www.youtu.be/FjNdYp2gXRY
The fan and the heatsink is from old PC (on CPU).
Instead of fuse F8A on my el. scheme I used 2 polyfuses for 3A in parallel.