Hello everyone!
I am struggling to understand how you use a transistor to switch a circuit on or off. The reason that this came up is that I have this infrared detector and emitter pair and when the detector senses IR it will drop the voltage. I was just playing around and wanted to use this info. to swtich a circuit on and off with an NPN transistor. I couldn't get it to work Could someone here, in very simple terms (still a noob here!) explain how you get a transistor to switch something on/off?
I do know that you have to have a voltage difference of so much between emitter and base for it to allow current to go through to the collector in an NPN.
Any help is appreciated. Thanks guys!!
Noura
I am struggling to understand how you use a transistor to switch a circuit on or off. The reason that this came up is that I have this infrared detector and emitter pair and when the detector senses IR it will drop the voltage. I was just playing around and wanted to use this info. to swtich a circuit on and off with an NPN transistor. I couldn't get it to work Could someone here, in very simple terms (still a noob here!) explain how you get a transistor to switch something on/off?
I do know that you have to have a voltage difference of so much between emitter and base for it to allow current to go through to the collector in an NPN.
Any help is appreciated. Thanks guys!!
Noura