This circuit for AC loads was found in February 1976, Radio Electronics magazine. The triac is common, and the times are given by the 20 MΩ resistor and the 1 uF capacitor.
This circuit, which may have appeared elsewhere on this site, is from the integrated...
We found this circuit in a 90s Radio Electronics. The circuit uses a transconductance operational...
This circuit was obtained from an 80's documentation from General Electric. The circuit uses an...