This circuit switches on an external load after a certain interval given by the capacitor. The circuit is from a documentation from the 80s. The load depends on the relay used.
We found this TTL circuit in a Texas Instruments optoelectronics manual. The power is 5 V and the...
Suggested by Texas Instruments, this circuit operates with frequencies that can reach some...
Using a CA3030, this circuit was found in the May 1988 Radio Electronics magazine. The power...