In that case, it'd be impossible to turn the switch off because V B (connecting to the control pin) would always be less than V E. For example, this circuit wouldn't work if you were trying to use a 5V-operating Arduino to switch off a 12V motor. This can cause complications, especially if the load's high voltage (V CC being 12V connecting to the emitter V E in this picture) is higher than our control input's high voltage. This circuit works just as well as the NPN-based switch, but there's one huge difference: to turn the load "on", the base must be low. ![]() This time however, the emitter is tied high, and the load is connected to the transistor on the ground side. ![]() Similar to the NPN circuit, the base is our input, and the emitter is tied to a constant voltage.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
June 2023
Categories |