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About issues caused by electrical noise, or improving the Signal/Noise ratio of an analog circuit.

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filter it on software, buy I prefer to make my life easier and pulse the IR emitter at 10 kHz, make an analog narrow bandpass filter and recover the signal without the DC component, induced noise and … quite nice method to improve noise immunity at low cost. Image to help to understand the question. When the small side of the object is in the red area the sensor fails to determine if the object is in there. (The measurement is too close or the same that the one without the object) …
asked May 30 '18 by guillem cabo