This is one of many configurations of this type that can be found on our website. The circuit uses two inverters and has the frequency determined by capacitor C1.
We found this circuit in a 1975 publication. The circuit can be made with more modern equivalent...
August 2016 - It can be obtained from Mouser Electronics the power factor controller NCP1602 from...
This is a traditional circuit in which a 741 operational amplifier is used as an audio amplifier with...