Using a 4046 PLL this circuit was obtained from the October 1994 issue of Electronics Now magazine. The circuit can be modified to generate signals at other frequencies.
Found in an Electronic Design from the 90's, this circuit uses common components. The circuit is...
When the sensor receives light, the relay closes its contacts and remains so even after the light...
This circuit produces pulses of 90 V at intervals that can reach 5 minutes. The circuit is from a...