This circuit can be used to test crystals from 1 to 20 MHz and also has an output to measure their frequency. We found it in the November 1998 Electronics Now magazine.
This circuit was found in Raytheon's 1967 documentation. The circuit uses an operating of the era,...
In a bistable circuit, as shown in the figure, we use two sensors. When one of them is touched, the...
This step of high gain and high voltage supply with direct coupling is from a documentation from...