OpenSprinkler › Forums › Hardware Questions › OpenSprinkler Bee (OSBee) › OSBee Schematic Question › Reply To: OSBee Schematic Question February 24, 2016 at 12:49 pm #41601 RayKeymaster Either is fine. 2N3904 (which is a very common BJT transistor) is cheaper than the AO3400 MOSFET, but if you are building a small number of boards it makes sense to consolidate the component type.
