LTE-302 Infra Red Emitter - 50 Pack
Now available from PMD Way are these compact side-looking infrared emitters.
These simple devices operate at 940nm and work well for generic IR systems including remote control and touch-less object sensing.
Using a simple ADC on any microcontroller will allow variable readings to be collected from the detector. The emitter is driven up to 50mA with a current limiting resistor as with any LED device. The detect is a NPN transistor that is biased by incoming IR light.
Click here for matching receivers. Emitters have a yellow dot on the top, receivers have a red dot on the top.