This circuit tests the offset current of an operational with the aid of an oscilloscope. The circuit is from an Electronic Design from the 90s.
We found this circuit in an old American documentation. The circuit applies to modern equivalent...
This 1967 Philips circuit recognizes a light signal (visible or infrared) modulated by tone. The...
A VCO or VCF [Voltage to Frequency Converter] can be built using part of a 4048 [PLL] circuit. The...