This circuit was found in an old documentation, being able to generate signals of frequencies in the range of 50 to 100 MHz. The components are of the time.
This circuit, found in 2002 documentation, generates a strong audio tone when the light in the...
We found this configuration in a Linear Applications Handbook by National Semiconductor in 1994....
This circuit triggers in 100 microseconds in case of excess voltage. The adjustment is made in the...