This 1 A circuit was found in a Philips documentation from 1966. The transistor is of the time, but a modern transistor of equivalent power can be used.
One 40108 Schmitt inverter or one 4093 gate can be used as a half monostable to be triggered by...
This circuit is from an Electronics Now from August 1995. The triac is according to the load that...
This Siliconix circuit was found in a 1980s documentation. The coil consists of 18 turns of 22...