This circuit was found in a Radio Electronics from 1970. The coupler with LDR is from that time, but the circuit can be adapted to use modern components and act as a shield.
This low-pass circuit was found in the December 1990 issue of Radio Electronics magazine. The...
This shield with feedback to control the direction of rotation of DC motors up to 500 mA with...
This circuit interferes with the operation of infrared remote controls. Your radiation should be...