This circuit from a Radio Electronics from December 1974 was used in color televisions of the time. It serves as a reference for restoration work. The circuit is of the ultrasonic type.
We find this circuit in an 80s operational amplifier documentation. The circuit applies to any...
Using a CMOS 4001, this circuit provides frequency readings on an analog instrument. The idea of...
In the figures we have an infrared transmitter with a BC337 switching transistor that must be...