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Mar1-12, 07:33 PM
Sci Advisor
P: 4,047
With that resistor, the circuit should only be drawing half an amp.

If the power supply has current limiting, maybe it is set too low? Try putting that 22 ohm resistor across the power supply output and see if that is enough to limit the current?

Otherwise, it sounds like a fault or a wiring error in the circuit.