This circuit was found in a 1967 Electronics World. We can design it with a BF245 for the FET and a BC558 for the bipolar transistor. The circuit has 3 scales and a 10 M ohm input resistance.
This circuit allows you to find two diodes with equal characteristics. The circuit was found in a...
This small amplifier with the fraction-watt LM4862 was found in the November 1999 issue of...
The output of this circuit must be connected to the input of an audio amplifier. The microphone is a small...