Homebrew Infrared Detector
Here is a nice simple and quick little homebrew project that I
ran across once and decided to build.It has served me well in my shop in
checking infrared emitters on end of tape sensors in vcr's,remote controls,etc.It
could even be used as a science project in science class in school as it
would demonstrate that infrared is emitted by ordinary light bulbs,sunlight
1- infrared detector, Radio shack cat.no. 276-142, this package
comes with both the emitter and detector you won't need the emitter in
1- standard red light emitting diode (LED) Radio Shack cat. no.
1-330 ohm 1/4 watt resistor, Radio shack cat. no. 271-1315
1-9 volt snap conector, Radio Shack cat. no. 270-324
1-project case, Radio Shack cat no. 270-213, or suitable case of
your choice. I used an old magic marker pen that I removed the felt
from the barrel for mine and it works well. the tip is just about the right
diameter for the detector and I ran the 9 volt connector out the other
end of marker barrel and just tape the battery to the barrel.I mounted
resistor on a small piece of cardboard that I could insert into the marker
barrel, and drilled a small hole in the side of the marker barrel to mount
my LED. As the marker is not square and bulky it is easy to get in those
tight places to check end of tape sensors on vcr's etc.
1-9 volt battery
Total cost of project approx. $11.00 and time it takes to build.
Enjoy,hope this little projects useful