As part of my level 3 electrical BTEC i have to carry out a project which involves designing and producing a small circuit. For my circuit i wanted to create a IR led powered by a a-stable 555 timing circuit to emit IR light at a set frequency. I then produced a receiver circuit which is designed to detect this IR light and then trigger a normal red LED to illuminate. My receiver outputs the 5v supply i give to it and then this output voltage drops to around 0.8v when it detects the IR light from my LED (normally closed receiver). However, this voltage only drops momentarily and then returns to 5v even though my IR LED is still emitting light.
I thought perhaps my receiver was at fault so i tested it by pointing a tv remote at my emitter and the voltage dropped and remained at this lower voltage so i checked the datasheets for my components but have been unable to find anything to explain why this occurs. However, i am not too familiar with all of the technical vocabulary used on the data sheet so i may have missed something.
Below are links to my IR components:
IR LED - http://www.rapidonline.com/electron...al6200-5mm-940nm-ir-transmitter-diode-49-4513
IR Receiver - http://uk.rs-online.com/web/p/ir-receivers/7085115/
Any help would be appreciated
I thought perhaps my receiver was at fault so i tested it by pointing a tv remote at my emitter and the voltage dropped and remained at this lower voltage so i checked the datasheets for my components but have been unable to find anything to explain why this occurs. However, i am not too familiar with all of the technical vocabulary used on the data sheet so i may have missed something.
Below are links to my IR components:
IR LED - http://www.rapidonline.com/electron...al6200-5mm-940nm-ir-transmitter-diode-49-4513
IR Receiver - http://uk.rs-online.com/web/p/ir-receivers/7085115/
Any help would be appreciated