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Adafruit Photo cell (CdS Photoresistor)is a CdS cell which are little light sensors. As it is expose..
$1.50
About the Product CNY17 - Optocoupler with Phototransistor Output is an optically coupl..
$0.18
About the Product CNY17 - Optocoupler with Phototransistor Output is a 4-pin integrated..
$0.17