This circuit appeared in Radio Elecronics magazine in 1968. The operating circuit is a general-purpose type at the time and the power supply must be symmetrical.
The integrated circuit used in this project is unusual. However, we can take advantage of the...
This circuit was found in Mullard's 1960s transistor manual. The circuit employs contemporary...
This circuit was found in a 1967 EEE. The transistors are from the time and can be tested...