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I'm currently working on a mod, to convert the S107 from using IR to RF 433mhz
So far, i have managed to encode the signal from the transmitter, and decode it in the helicopter. (see schematic of a rough draft of what I've made so far)
The problems I'm having so far, are the extremely shot range (<10cm) and the added weight of a 70mah li-po to power the receiver, (I think the short range is due to mis-matched antennas, as it should be able to get over 100m.)
An alternative way of increasing the range whilst minimizing weight, would be using the same transmitter but making a network of IR transmitters over the area that you are flying.
(thanks go to http://www.rentron.com for the images)
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