This circuit was obtained from American documentation from 1966. It triggers when the two input voltages are within a pre-established range. The circuit can be mounted with modern transistors.
This circuit is from a 1967 General Electric SCR manual. The capacitors are polyester and the...
This circuit is from an old American documentation. In it we have a simple way to fire an SCR from...
We found this circuit in a Japanese 1968’s documentation. The circuit makes use of transistors from...