This 1968 Hughes circuit uses period components and operates at 8 Hz. Current equivalent components may be employed. Note the high supply voltage.
We have in the figure a traditional amplifier configuration with operational amplifier. The source...
This circuit was found in a 1977 Radio Shack documentation. The circuit is TTL, which must be...
This circuit is suitable for modulating small FM transmitters for eavesdropping or espionage. The...