This circuit was obtained in an Electronics World of 1968. The operational amplifiers ones are types of the time, no longer used today. The circuit responds from less than 20 Hz.
Found in Popular Electronics from the 90s, this circuit can be used for high voltage applications and...
This circuit was found in a 1968s American. Transistors are of general purpose and the input is a...
This solid-state relay circuit (SSR) or shield is from a 1995 Electronics Now. With it we can...