3lectrix
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Infrared Proximity Detector - This proximity detector using an infrared detector (Fig. 1) can be used in various equipment like a
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Infrared Proximity Detector - This proximity detector using an infrared detector (Fig. 1) can be used in various equipment like a
This proximity detector using an infrared detector (Fig. 1) can be used in various equipment like automatic door openers and burglar alarms. The circuit primarily consists of an infrared transmitter and an infrared receiver. The transmitter section consists of a 555 timer IC functioning in astable mode. It is wired as shown in the figure. The output from astable is fed to an infrared LED via resistor R4, which limits its operating current. This circuit provides a frequency output of 38 kHz at...
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