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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TCS3771 датащи(PDF) 19 Page - OSRAM GmbH |
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TCS3771 датащи(HTML) 19 Page - OSRAM GmbH |
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19 / 49 page  Page 18 ams Datasheet Document Feedback [v1-31] 2018-Apr-04 TCS3771 − Principles of Operation Proximity Detection Proximity sensing uses an external light source (generally an infrared emitter) to emit light, which is then viewed by the integrated light detector to measure the amount of reflected light when an object is in the light path (Figure 21). The amount of light detected from a reflected surface can then be used to determine an object’s proximity to the sensor. Figure 21: Proximity Detection The TCS3771 has controls for the number of IR pulses (PPCOUNT ), the integration time (PTIME), the LED drive current (PDRIVE) and the photodiode configuration (PDIODE). The photodiode configuration can be set to red diode (recommended), clear diode, or a combination of both diodes. At the end of the integration cycle, the results are latched into the proximity data (PDATA) register. Figure 22: Proximity Detection Operation |
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