This circuit for automotive use was found in American documentation from the 90s. The circuit uses common components today. The relay is 12 V.
This TTL circuit was found in the December 1990 issue of Radio Electronics magazine. The circuit has...
We found this circuit in Sperimentare magazine number 4 of 1977. The magazine no longer exists, but...
This crystal configuration can be made with triggers of any logic. The frequency is given by the...