The integrated circuit used is uncommon today. The circuit was obtained in the Philips integrated circuits manual of 1990. The reference voltage-range is from 0.5 to 9.0 V.
This sensitive electroscope uses a MOSFET 3N128 and can detect electrostatic charges of objects....
This circuit can use both separate LEDs and a common cathode display when one segment indicates...
This circuit dates to 1999, when most vehicles did not yet have electronic ignition and used...