Laser source diode (CB7840E)

This circuit for battery powered laser diodes was found in a 1992 RE Experimenters Handbook. The circuit uses common components today.

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Electronic Machine Gun (CB17369E)
Touching the sensor with your fingers, this circuit produces a machine gun sound. The circuit must...
Hearing and Motion Sensor Platform
August 2017 - STMicroelectronics' BlueCoin development environment is available at Mouser...
Garage Warning (CB6041E)
We found this circuit in an old documentation. Its purpose is to turn on warning lights when the...