Hi all, I have an arduino connected to a garage door opener. It uses xbee and a relay to open the door. All works fine, but I have to make it work without batteries, and I can tap 30VAC from the transformator. Does anyone know of a simple rectifier I could use to make a stable supply for my arduino…

Making a simple AC/DC power supply

Forum 2005-2010 (read only) General Frequently-Asked Questions

system November 4, 2009, 1:01pm 3

Thank you for the prompt response. However I have difficulties in picturing your proposal. I thought the 7805 made 5v, and that the caps for the 7805 should be in the uF range?

Joachim

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Making a simple AC/DC power supply

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