This transformerless circuit was obtained in a 1965 publication by Ferranti. The components are from that time, with emphasis on the type of engine used.
In this circuit we show how to modulate the pulses produced by a 555 in frequency. The circuit can be...
This toy organ was found in Popular Electronics from January 1967. It can be constructed from...
This elaborate electric fence design differs from the others by triggering an alarm in the event of...