This circuit, obtained from a 1965 magazine, can still be assembled using some modern equivalent components. The transistors may be BC558 and the transformer is obtained from a disused transistor radio.
This circuit was obtained from a 1967 magazine. The magazine no longer exists, but the circuit can still...
The figure shows a simple circuit to power LEDs from the AC Power Line. The resistor can be a wire...
This circuit is a handset receiver that picks up the signal emitted by a coil under the rug or...