Can I use a 20V or 24V to power up a piano that needs 21V?
423
Choosing power supply, how to get the voltage and current ratings?
144350
Choosing capacitors for a linear voltage regulator
98480
Using 240v mains on/off as input to microcontroller
131932
How to create bipolar power supplying from Powerbank 5V 3A
147687
Practical way to generate 1500V?
67448
Can I use a charger with more output amperage than the device needs?
80449
DIY 24v to 5v usb phone charger
67534
What is / how can I get a student-safe power supply for electronics projects?
32346
How to get 20 V from a USB-C charger?
116502
Is 20 watts of electricity dangerous?
113480
Using voltage divider in a circuit
91831
Using series of LM 78XX for power supply
31952
Regulated AC power supply?
37729
What's a simpler way to switch between power sources?
15042
What amp rating of 24vac transformer for LM317T?
36923
Which method or component is best to regulate 42 to 3.3 V?
143630
How do I power up the radio transmitter?