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IR Proximity Sensor
Posted on Thursday, April 15, 2010   •   Category: Sensors

IR Proximity Sensor

It is the same principle in ALL Infra-Red proximity sensors. The basic idea is to send infra red light through IR-LEDs, which is then reflected by any object in front of the sensor. Then all you have to do is to pick-up the reflected IR light. For detecting the reflected IR light, we are going to use a very original technique: we are going to use another IR-LED, to detect the IR light that was emitted from another led of the exact same type! This is an electrical property of Light Emitting Diodes (LEDs) which is the fact that a led Produce a voltage difference across its leads when it is subjected to light. As if it was a photo-cell, but with much lower output current.

     Ultrasonic Parking Assistant
     Solar Recorder
     Automatic Fan Controller Circuit
     Temperature Control using a DS1621 Sensor and a ATtiny 2313 Micrcontroller
     PIR Motion Detector
     Park Assist Circuit
     Water Alarm
     Electronic Thermometer using LM35
     Temperature Controlled Fan
     Digital Thermostat with LED Temperature Display
IR Proximity Sensor

 

Build Accurate LC Meter and start making your own coils and inductors. This LC Meter allows to measure incredibly small inductances making it perfect tool for making all types of RF coils. LC Meter can measure inductances starting from 10nH - 1000nH, 1uH - 1000uH, 1mH - 100mH and capacitances from 0.1pF up to 900nF. The circuit includes an auto ranging and reset function to make sure the readings are as accurate as possible ... [more]



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