This circuit is from a Radio Electronics from March 1960. The generator works with a 22.5 V battery, generating good intensity signals determined by the LC circuit.
This commercial radio from Iwata Electronics was manufactured in Japan in the 1960s. The circuit uses...
I found this circuit in an old British magazine from 1976. It is possible to test operational...
This circuit provides a delay for the activation of an alarm, giving the owner time to leave the...