Changing voltage levels from 5V to 3.3 V
7084
ADC for measuring 0-5V but connected to 3.3V device
144550
Different and opposing voltage sources?
78779
How to use a Raspberry Pi Pin(3.3V) to reset a ATMEGA328(5V)
101263
Measuring an Arduino's power source voltage using Analog In
125652
Double-Subscript Notation for Voltages
125118
230V AC to 5V DC converter, lossless
35421
How do I convert 9 V DC to 5 V?
3826
LM393 voltage comparator is not working
103078
What value to use to convert ADC value to voltage?
42152
Adding DC voltages of PSU
88722
How to tell if mains voltage is on with microcontroller?
18771
Switch between 5V power supplies?
116874
Connecting two power supplies with almost like voltages to an amplifier in parallel
71421
How do I change a switched outlet to a half-hot outlet?
120242
Mains Voltage on Strip Board
153031
How to change the voltage polarity in an inverting amplifier?
44127
What are the ways to make a dual power supply from a single voltage source?