induction heater

Having played with a manually tuned induction heater a few times before I knew how tedious it could be to operate. For one thing the resonant frequency isn't constant, but varies with the work piece size and temperature of the tank components. If the operating frequency is used to regulate power, more time is spent watching a scope then the work piece. What I wanted was a driver that would automatically find the resonant frequency or regulate power on the fly. It would be nothing new actually, as this type of driver has been done before only with discretes (see links below). Tim William's IH is complicated as hell though, and I wasn't going for something that elaborate. So after many different versions I eventually got something which worked and was reasonably simple.

Simply put, this tool serves to heat up something made ​​of metal. using electromagnetic induction power.
try it!!!