This 50% active cycle TTL clock generates signals from 4 to 20 Hz. Its power must be supplied with 5 V and other frequencies can be generated with capacitor replacement.
When the power is on, the 1 µF capacitor charges slowly by R1 and P1 until then on trigger...
This capacitance or approximation relay was found in an ancient American documentation. The SCR...
July 2017 - The new Surface Mount SM0402xx LEDs from Bivar can be found on Mouser. The new...