Found in a 1967 Electronic Design, this circuit operates in a range of 0 to 1 V input with frequencies determined by C2. The components are from the period.
This simple circuit makes use of a buzzer with a 6 V oscillator, compensating for the 2 V voltage...
This receiver for the police band, which at the time was 45 MHz, was found in a publication by...
This car alarm was found in a 1965 General Electric manual. The SCR can be commonly used with the...