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 high impedance circuit uses a 12 V lamp to test voltages in a car. We found it in a Popular...
We found this circuit in a 1994 publication. It uses common components and can measure frequencies from 0...
This receiver can tune in the 3 to 12 MHz band with good sensitivity and selectivity, using a good...