Why do some Arduino relay modules can handle up to 250 VAC but not above 30 VDC?
50743
Switch current rating AC vs DC
116269
Ground type for DC regulator
13408
My linear voltage regulator is overheating very fast
88908
Why does my multimeter show a wrong voltage over a large resistor?
111778
What are the differences between an AC and DC coil relay?
155857
Voltage rating vs. power rating of a resistor
132950
Scale 30-50 mV signal to 0-5 V range
50194
How to read high voltages on microcontroller?
135501
Why isn't maximum current forced upon a circuit by a power source?
82647
Why do some devices have 200V on the case?
134426
How do I convert, lower, or raise voltage?
148525
Why are relays so frequently driven by optocouplers?
50476
How much current can a 0.1" pitch pin header pass?
129453
Why do some wire gauge ampacity charts state vastly different current ratings?
32052
how to reduce DC voltage using resistors?
106155
How can I replace a relay with a MOSFET Transistor?
38040
Basic voltage divider issue in my amateur circuit XBee