This circuit from March 1984 Radio Electronics is intended to allow the use of an oscilloscope to measure capacitance. The circuit uses common integrated circuits.
Found in a 1969’s documentation, this circuit can supply currents from 100 to 120 mA at loads of...
We found this receiver in old documentation. The transistor is made of germanium and the...
We found this project in a 1982 publication. What we have here is an audio signal relay trigger, which...