Thanks for having a gander. This is my first video instructable, so I hope you all like it! A lot of time and detail went into the making of the video. This instructable is for a very simple relay driver circuit that you can use to power AC using small 5v DC voltages. Namely digital signals that come off of your microprocessor. While we do sell a kit of this design with a PCB, you can easily come up with the parts yourself for only a few bucks.
The video covers the operation, assembly, and circuit theory. I also give a good demonstration at the end.
I'd like to note that the diode across the base of the transistor IS talked about in the video, so make sure to watch!
A PDF of the schematic can be found here: http://www.electroniclessons.com/relay.pdf
We're selling this as a kit in our ebay store: http://www.electroniclessons.com and at our web site: http://www.engineeringshock.com
Thanks for watching everyone!