Post by thread:[EE]:Rolf and exceeding 20 meters of IR communicat

Hi Rolf 1) Yes I have a scope for sale cheap. If you are interested reply to me directly at spam_OUTscope.for.cheapTakeThisOuToh-dog.com 2) Possible solution: Use more than one IR LED stacked in series. Use a separate battery set with a voltage larger than the combined drop of the LEDs. If you use 5 LEDs that would be 5 Volts drop. ( Assumming your IR LEDs drop 1V each, which is hard to believe ). Use your PIC to drive a FET transistor that turns on the string of LEDs. All LEDs now share the same current and only one limiting resistor need be used. 3) Using lenses is good idea. Start with a visible LED with the same half power angle as your IR LED. Now you can experiment with lenses that will make the beam more directional. ( this may require a darkened room ) The receiver may benefit from a tube with flat black interior that is pointed at the LED transmitter. This will reduce interference from the sun and reflections. Here are some quickie URLs I found http://van.hep.uiuc.edu/van/qa/section/Light_and_Sound/ Lenses_and_Mirrors/20041111101841.htm http://softlyspokenmagicspells.com/halloween/light_beam.html Augustus Gustavius Salvatore Calabrese 720.222.1309 AGSC http://www.omegadogs.com Denver, CO and now the small print: Disclaimer: The above statements are not intended as an endorsement of any kind and any inference of having any verifiable knowledge about anything referenced above is purely coincidental. ( it is hoped ! ) If any statement above might get the author into trouble, it was not supported by the author but passed along from some mal- content as an educational experience. Alignment is with authority figures at all time; especially those with large police forces. PLEASE DON'T HURT ME ! I AM ON THE GROUND AND SUBMISSIVE. If you are not part of the solution, you are precipitate. ALL ORIGINAL COMMENTS / IDEAS / TEXT IN THIS MISSIVE ARE PUBLIC DOMAIN. USE THEM AS YOU WILL.