This interesting circuit in which the LED display is circular imitating a common clock appeared in the Radio Electronics magazine of May 1977. The power supply is included.
This circuit shows how to use an LED as a photodiode controlling a signaling LED. As the LEDs can...
This circuit uses a PUT, a component not very common nowadays. Its purpose is to provide an...
082E) We started with a simple Hartley oscillator circuit using a bipolar transistor that can...