Shared ground between two different circuits?
56605
Is it OK to borrow a ground wire from a different circuit?
92681
Controlling Two Circuits with One Switch
62968
OR-ing power supplies (diode or mosfet)
100822
How can I determine if my outlets can easily be grounded?
113480
Using voltage divider in a circuit
148814
Arduino Negative Voltage Reading with Positive Ground
23438
How can I replace 2-prong receptacles in a code compliant way?
63411
Is it ok to feed the output of one LDO regulator to the input of another?
4854
Using multiple power supplies in one PC
102767
There's a difference between hot/neutral AC lines in a plug, but does it matter?
154128
Link bonding across multiple switches?
146775
How to add GFCI to a box with one outlet controlled by a switch?
158639
Single point vs Ground plane, in audio OP AMP PCB layouts
34914
Can You Swap Two Capacitors With Different Ratings?
12033
What would happen if I connect two different DC voltage sources in parallel?
12176
Can I use two 7805 ICs in parallel to get double current capacity?
69660
Different voltage sources in parallel