We found this circuit in a documentation from the 70s. Semiconductors are from the era and can be replaced by modern equivalents.
This small transmitter can send its signals to a receiver placed at distances up to 100 m. The...
This transistorized siren was found in Popular Electronics from April 1967. The signal must be...
We show only one of the channels of an excellent audio preamplifier with the LM382 integrated...