How can I get 48VAC at 50Hz from mains 220 at 60Hz?

Thread Starter


Joined Apr 15, 2021
Hi all, I'm making a custom application and I need a source for a device that takes 300mA - 48VAC at 50 Hz to power. I can easily get the 48V, but how can I get it to 50 Hz?
All I've got so far is just trying to rectify it and then using a function generator, but is there another way that wont take up too much space in my design?

1644425972370.pngthe proposed rectifier


Joined Mar 14, 2008
Are you certain the device can't operate from 60Hz?

Otherwise you could use a 50Hz sinewave oscillator to an audio amp IC driving a transformer.


Joined Apr 2, 2020
Can you just use a 48vac 50Hz power supply? Do you really need something that fits into your device?
For a quick and easy solution, I would...
-download a sine wave signal generator app to my iPad or phone
- plug the phone into my 100w/channel stereo receiver.

Connect the output to a 2:1 step-up transformer to get your 48vac. You'll need a monster mower receiver to get to 48vac without a step up transformer.

Just adjust volume knob to set voltage and use the app to adjust frequency and waveform.