Friendly note: Power supplies don't push current

cliffordcooley

Posts: 12,795   +6,147
I wanted to start a new thread, rather than create confusion by commenting in a help thread.
if the power supply is overvolting or sending too much current

I=V/R (Current equals voltage divided by resistance)
Power supplies regulate voltage and then supplies current depending on resistance.

When voltage is too high, this increases current*.
When load resistance is low (potentially shorted somewhere), this increases current*.
*potentially damaging the supply and/or load, if the circuit is not protected by fuse or circuit breaker.​

Either way current is controlled by voltage and resistance. Too much current means the voltage is too high or the resistance is too low.