The cheapest and simplest way of getting a negative voltage rail
13:26
Dual Rail Supply - Different Options for Negative Voltage
9:54
Negative Voltages are more important than you think! So here is how to make them! EB#52
9:27
I bought super cheap DC-DC converter on Amazon, but It was FAKE.
23:33
How to use op amps with a single rail power supply
21:04
Design Your DIY Power Supply! (+/- 12/15V)
8:07
Dual supply audio amplifier kit powered from single power supply
12:14
555 Negative Power Supply
10:59