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.
Found in a Popular Electronics from the 90s, this circuit can be used as an electrifier. T1 can be...
This triple power source suggestion for the bench was found in an American documentation from the...
This CMOS Flasher was found in a Popular Electronics from 1978. It can still be easily assembled, as all...