Using DC current to operate a fish feeder that takes 2 AA batteries
423
Choosing power supply, how to get the voltage and current ratings?
32052
how to reduce DC voltage using resistors?
125118
230V AC to 5V DC converter, lossless
92999
Amplifying current using a buffer
100783
How to limit current of an AC signal
37729
What's a simpler way to switch between power sources?
110466
Alternating current
81659
Current sensing nA to mA
69035
Determining current in a branch having no resistor
6152
Automatically switching from 9V battery to DC wall adapter on insertion
30624
Automatically switching from battery to DC wall adapter on insertion
117910
How to drive multiple LEDs from a Li-ion battery (with varying voltage)?
95587
How can I safely prototype a mains power circuit?
70745
Connecting two DC wallwarts in series - to produce dual DC supply
157865
Formula between wire size and current
62968
OR-ing power supplies (diode or mosfet)
158957
Is a current transformer appropriate for a voltage step up flyback converter?