What is the point of the transistor to drive the relay coil
110730
Why drive a relay with a transistor switch?
124272
Why am I cooking MOSFETs?
49285
Is my MOSFET-based bidirectional level shifter insane?
96041
A question about E12 series resistors
121865
BJT in Reverse Active Mode of Operation
130659
When/why would you use a Zener diode as a flywheel diode (on the coil of a relay)?
64282
How to interface a SPST switch with minimal current (1µA)?
101224
When to use what transistor
14455
can you explain me the working of this circuit in detail?
56363
What do multiple emitters/collectors imply in a BJT schematics symbol?
93379
Using NPN transistor as switch
125924
What is the need for an inductor coil in a smps-buck converter?
5379
Choosing the right transistor for a switching circuit
2140
Why are the transformer windings in series with line and load in this circuit?
98627
Why does one need a loop device at all?
105596
Solenoid Driving Circuit
77947
Diodes circuit confusion