This circuit was found in RCA documentation from the 1960s. The circuit uses components from that time and can measure speeds up to 10,000 rpm.
This circuit was obtained from a Linear Technology manual from the 1990s. The sensor is of the...
This circuit for VCR recording heads was found in the February 1990 issue of Radio Electronics magazine....
The integrated circuit used in this project is not common today. It was found in a 2000...