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.
Touching the sensor with your fingers, this circuit produces a machine gun sound. The circuit must...
August 2017 - STMicroelectronics' BlueCoin development environment is available at Mouser...
We found this circuit in an old documentation. Its purpose is to turn on warning lights when the...