Adjustable Constant Current Load

293

05:31:27

Adjust the pot to vary the current draw.
The circuit draws a constant current from the power. The current draw can be varied between 22.7mA and 2.25A. Constant current is drawn from the source by ensuring that there is a constant voltage drop across the 100mohm shunt. When there is a constant voltage drop across the shunt, there is a constant current flowing through it.
Make sure to put the power MOSFET on a big heatsink. In this configuration, the tranny is dissipating 22.275W of power. (It's the voltage drop across the tranny time the current through it).
The 2.5V comes from a voltage reference (like the tl431).

published 7 years ago

chiro12

6 years ago

Please I need made constant current 600A you can help me

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