This circuit is from a 90s documentation. It has a hysteresis and uses a light sensing bridge. The circuit generates a 1000 Hz modulated 10 Hz signal. The signal must be applied to an amplifier.
This circuit that can amplify signals from 0 to 30 MHz was found in a 90s Popular Electronics....
August 2017 - STMicroelectronics' BlueCoin development environment is available at Mouser...
In this circuit the output current is limited by R3. For a 300 mA current, R3 must have 12 Ω. For...