This circuit is from a 1968 Texas Instruments documentation. The components are from the time and the sensor photodiode is difficult to obtain today. The circuit has a response from 10 Hz to 20 kHz.
This circuit is a manual of 1972 RCA power transistors. The critical components of the project are...
September 2017 - Texas Instruments DRV5032 Hall Effect sensors, an ultra-low power digital switch...
This circuit was found in an American 80s circuit manual. The components used are unusual. The...