The RCA integrated circuit used in this control is uncommon today. The circuit is from an Electronics Now from July 1995. The sensor determines the value of the adjustment potentiometer.
This conventional astable uses two NPN transistor and was found in a publication of the year 1968. The...
This simple effect circuit for musical instruments and stereos was found in a 1987 publication. Powered by...
This circuit is a suggestion from a Radio Electronics from October 1964. We found it in the patent...