24v power supply to 24v and a Arduino
5227
When would I use a voltage regulator vs voltage divider?
36776
Input impedance of Arduino Uno analog pins?
137995
Powering a circuit from either USB or LIPO
98480
Using 240v mains on/off as input to microcontroller
28292
Making dual power supply from single for opamp?
92255
How can I use a 12 V input on a digital Arduino pin?
89981
Can I safely connect the power-only-end of a USB-Y cable to an other power source?
135049
Is it safe, or even possible, to draw more power from a USB port than it was designed to provide
115593
How to measure line voltage (220V) with an arduino?
133479
6 Volt Futaba Servo controlled by a 5V Arduino
91814
4-20mA output/transmitter?
136371
Mains doorbell to Arduino
44127
What are the ways to make a dual power supply from a single voltage source?
80781
Can a 20V 4.51A power supply be used with a computer that requires a 19V 3.42A power supply?
34417
What kind of power management circuit do I need to embedded a rechargeable battery in my electronics project?
33777
home socket with DC voltage
69539
Powering 30m of RGB LED strips?