npn transistor as a switch
14112
Why would one drive LEDs with a common emitter?
59838
Automatic switch using LDR
95215
Boolean value switch/invert
73289
How to implement a switch in spice?
106586
How to amplify 3.3V to 10V by using an NPN transistor? How to select resistor based on current, how does the amplification happen?
122522
Interfacing switch and LED
130901
2 logical inputs on the same circuit
121688
Why do you need 2 resistors when hooking up a transistor as a switch
110730
Why drive a relay with a transistor switch?
92681
Controlling Two Circuits with One Switch
105529
Detecting state of LED to control another circuit
6097
specifying a non-momentary switch?
132651
Transistors: Quiescent voltage and Active mode
35964
How do I saturate an NPN transistor?
151393
Toggle Switch to swap the connections of two buttons
74135
NPN circuit to switch 12v 1A DC load by 3.3v 1A DC using PIR
49485
How to use a transistor to pull a pin low?