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.
This one-digit counter is part f the samples bench of the MultiSIM in one of its versions. The...
The FAN1117A and FAN1117A-5 integrated circuits from Fairchild consist of fixed and adjustable...
This circuit was found in the February 1970 issue of Radio Electronics magazine. The integrated circuit...