Found in a 90s Popular Electronics, this sensor operates by infrared reflection. The components are modern, and the phototransistor can be of almost any type.
This circuit uses an optical door opening sensor sensing the action of ceiling light or another...
STMicroelectronics MP23AB02B MEMS Audio Sensor is a compact, low-power microphone built with a...
April 18, 2016 - Mouser Electronics, Inc., the global authorized distributor with the newest...