This old circuit, from the 80's, uses an integrated circuit that is uncommon today. The circuit is intended for loads controlled by triac and the resistors depend on the desired control.
Unlike the previous circuit, which is an inverter type, this one is non-inverting. The circuit...
The shock is 2.5mH for frequencies between 3 and 30MHz. C is 1nF, R is 47k and the transistor can...
The integrated circuits in this application are not very common today. One consists of an A / D...