We found this circuit in a 90s Popular Electronics. The circuit can be implemented with modern components. The power MOSFET is according to the controlled load.
Based on the well-known LM3914, this circuit has a transistorized and inverters stage, triggering...
This circuit was found in the October 1979 issue of Radio Electronics magazine. The circuit is...
This circuit was found in a Philips documentation from 1970. The components are of the time,...