This 1965 circuit uses a Philips 4068 tube to measure extremely small charges. The circuit has as indicator a micro ammeter and the transistors are of the time.
This sensitive motion sensor with inductive sensor was found in a 90s Elektor. The circuit uses only...
This circuit has an output that provides the average value of the rectified voltage. Operational...
May 2017 - New sequencers UDC9090A for monitoring up to 10 power supplies from Texas Instruments...