How to I know if an electronic component works with AC?

ElectricSpidey

Joined Dec 2, 2017
1,970
Regulating AC is very difficult, and not my area of knowledge, are you sure you need regulation?

If not a simple step down transformer might do what you need.
 

MrChips

Joined Oct 2, 2009
24,620
For 12VAC to 5VAC, use a step-down transformer.
For 12VAC to 5VDC, use full-wave rectifier, smoothing capacitor, LM7805 linear voltage regulator.
 

Thread Starter

Bogdan_Ionut

Joined Oct 5, 2021
9
In my country on the power outlets we have 220 V DC. I have an old laptop charger that take this 220 V DC and outputs 12 V AC. However I have a device that needs 5V AC. I need to step-down the 12V AC to 5V AC. I can't find AC-AC step-down.
 

Thread Starter

Bogdan_Ionut

Joined Oct 5, 2021
9
I made a mistake on power outlet we have AC. We call alternating and continuous current not direct current, so that's why I made this mistake
 

DickCappels

Joined Aug 21, 2008
7,981
Now that we know it is AC you can use a transformer to reduce the voltage. With a input to output voltage ratio like that (about 40:1) you are going to need a transformer.


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Ramussons

Joined May 3, 2013
1,100
In my country on the power outlets we have 220 V DC. I have an old laptop charger that take this 220 V DC and outputs 12 V AC. However I have a device that needs 5V AC. I need to step-down the 12V AC to 5V AC. I can't find AC-AC step-down.
Now, why would a Laptop Charger give 12 Volts AC ? Or is it 12 Volts DC?
Does your Device require 5 Volts AC or 5 Volts DC?
 
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