This old 1 W audio amplifier transistor circuit is from a 1967 Japanese magazine. The transistors are germanium of the time and the type transformers found in similar equipment of the time.
This circuit causes an LED to flash at a frequency determined by the capacitor. The circuit has an...
Found in American documentation from the 1980s, this circuit uses transistors from that time. It...
This very interesting project was obtained in a 1980 publication. It consists of a device that is...