This circuit generates pulses whose frequency depends on C1. The circuit can be powered by voltages from 5 to 15 V. We find this configuration in a Signetics manual.
This special effect circuit with LEDs using the 4017 was obtained in a 1982 publication. LEDs are...
T This circuit produces an audible signal when someone touches the sensor, or even approaches. The...
This transmitter operates in the 80-meter range, around 3.5 MHz, with an exact frequency value...