This circuit is from a National Semiconductor manual from the 1980s. The integrated circuit is rare today and next to the diagram we have the formula for calculating the components.
This is one of the first radios with an integrated circuit. The circuit is from a Radio...
This circuit already incorporates the amplification stage, since the oscillator is of the type of...
Output stages driving relays or other loads are plugged to the outputs of a 4017. The trigger...