We found this circuit in a 1996 publication. The circuit uses components that are still common. The timing depends on C1, which can be changed, and the triac can be of any type.
We found this circuit in a 70s Electronic Design documentation. The circuit uses general-purpose...
Texas Instruments ESD122 Electrostatic Discharge Diodes (ESD) can be ordered from Mouser...
This circuit is suggested by Motorola as the basis for the MC3324 A integrated circuit and has a...