This 1 to 40 MHz amplifier is from a 1969 Motorola documentation. The components are of the time but admit modern equivalents.
This circuit can measure frequencies up to just over 1 MHz and uses CMOS technology. The circuit is...
This circuit, found in 2002 documentation, generates a strong audio tone when the light in the...
The integrated circuit used in this 80's application is not common today. However, modern...