This an old commercial receiver found in a year 1958 magazine. The circuit uses some transformer available that timer and the transistors are germanium types. The circuit is intended to receive MW stations.
This circuit found in a European publication from the 1980s, is based on PLL 566. The frequencies...
When the lights turns off this circuit will produce a sound like a cricket. When the lights are...
This circuit causes an LED to flash at a frequency determined by capacitor C1. The circuit can be...