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The circuit describes here, very simple, little expensive to realize and without any regulation, allows to confirm the smooth running of a remote control with infrared, which as you know doubtless already, produced a continuation of bright impulses the brilliance of which is invisible to the naked eye. He is endowed with a photosensitive sensor of type phototransistor or photodiode, associated with a small amplifier to AOP who allows to light a red LED when the expected brilliance IR reaches the sensor. SO THAT THIS CIRCUIT WORKS, IT IS NECESSARY TO REPLACE THE TRANSISTOR BY A PHOTOTRANSISTOR OR A PHOTODIODE!
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