Uploaded August 2017 | Updated September 2026, 1 day ago

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Use a LM317 to control up to 5-10 amps through a PNP transistor.
Updated videos:
Measure Current from Constant Current Source with Arduino
youtu.be/AtBdjvbhNhQ
Arduino Controlled Constant Current Source
youtu.be/DL9Fb3o5px8
The actual schematic is on the webpage.
bristolwatch.com/ccs/LM317b.htm