High Side Switch Arduino. Just use an integrated high side switch something like auri3313 and a sot323 transistor and you have a high side switch with 10mohm 20a thermal protection short circuit protection for few. The drain on the mosfet produced by the fan although too high for an arduino uno pin is relatively low.
This post describes a circuit utilizing two bipolar junction transistors bjts to accomplish switching 15ma of nominal 12v from a 3 3v arduino gpio. Load is not very inductive mostly led arrays and possibly incandescent and halogen lights loads to be managed with the arduino s native 500hz pwm. Just use an integrated high side switch something like auri3313 and a sot323 transistor and you have a high side switch with 10mohm 20a thermal protection short circuit protection for few.
Because of how transistors work these can be a little more difficult to use in an arduino or raspberry pi circuit.
Obviously the gpios of a 3 3 or 5v arduino can t accomplish this task alone. This transistor connects between v and the load. Load is not very inductive mostly led arrays and possibly incandescent and halogen lights loads to be managed with the arduino s native 500hz pwm. Typically these use a pnp bjt or p channel mosfet.
