Jun 18, 2018
Testing the CNY70 reflective optical sensor as a digital input for a PIC16F887 microcontroller.
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Testing the CNY70 reflective optical sensor as a digital input for a PIC16F887 microcontroller.
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CNY70
CNY70
2009/08/22 14:17
零售 HK$10
datasheet download [PDF]
Reflective Optical Sensor with Transistor Output CNY70
www.vishay.com/docs/83751/cny70.pdf http://smallsystems.isn-oldenburg.de/smallrobots/ws2001/Tischkante/cny70.pdf Vishay 收購了 TELEFUNKEN 後, 這個 CNY70 一直都有出產, 但是 datasheet 羅列的腳位卻有分別, 輸入端 (Emitter) 一致, 輸出的端(Detector) 的E腳和C腳剛好相反, 手上的樣品為 TFK719, 要實驗才能明確知道 EC腳的位置. 簡單的測試設定 LM2903, 一個 CNY70, 一個 (確認 PIN OUT 對應 VISHAY 的 DATASHEET) LED, 紅綠各一個 10K, RESISTOR 兩個 1K, RESISTOR 兩個 100, RESISTOR 一個 100uF/35V, CAPACITOR 一個 104, CAPPACITOR 一個
video clip of test http://www.youtube.com/watch?v=9cGK4CzEN9s 結論: 1) 感應距離的確有 0 - 5mm 2) 黑色物件表平面吸收紅外線, DETECTOR 看不到反射回來的紅外線就有動作, 如果吸收率不高會誤判 3) 一般電視的紅外線遙控器會干擾 DETECTOR, 會誤判 4) 反射平面過於窄小及非黑色, 未能偵測, 不適用於邊緣檢測