This circuit is the factory version of the LM386 low-power amplifier. The sound quality is excellent, and the power can be supplied with voltages from 6 to 16 V.
This circuit is from a 2001 documentation used for old analog televisions. However, if the reader...
For experiments with ionization chambers and Geiger valves this circuit generates high voltage from...
When the sensor is activated the relay turns on powering na external load such as a buzzer siren...