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.
The illustrated circuit uses the AUIRS2301 S from International Recfifier (www.irf.com) and is...
This timer was found in English documentation from the 80's. The integrated circuit is common...
This circuit is from an Electronic Design of the 90's. The circuit can be implemented with more...