How do I increase range in IR sensors?
Is there any way I can increase the distance/range from the transmitter to receiver in IR sensors?· I purchased these sensors which have 8 feet maximum range, but I heard a convex lens can be used to increase it?· What are those, where can I find them, how do I use it and is there another·way I can increase my range without the lenses?
Thanks!
Thanks!
Comments
He does link to it, but it's not obvious...
http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&storeId=10001&catalogId=10001&productId=177092
IR range can also depend on how well the circuit is tuned.· A simple L-C tank tuned at 40kHz (or whatever) on the
receiving end that is excited by the IR detector can increase your range >>GREATLY<< ...It does look like there might
be a coil, but since this is from a "kit", it probably isn't tuned all that well.
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Beau Schwabe
IC Layout Engineer
Parallax, Inc.
I'd stay away from lenses other than the ones built into the LED and sensor and concentrate on illuminating the "scene" better with more power (and more LEDs) and tuning up the sensitivity of the sensor.
Keep in mind that most IR remote controls can reliably work across much more than 8 feet without added lenses.
Post Edited (Mike Green) : 9/8/2006 9:09:11 PM GMT