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Unread 07-01-2010, 02:11
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C222 C222 is offline
Computer Science Major
FRC #0852 (Athenian Robotics Collective)
Team Role: Alumni
 
Join Date: Mar 2007
Rookie Year: 2007
Location: California
Posts: 22
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Re: Wireless Thermometer Wireless Data

When I say I know how to make it transmit information I want, that pretty much means I'm going to replace the thermistor with a different resistor or analogue voltage source like a photo resistor or an analogue out of a micro controller.
As for the people who designed it, I cant find them anywhere. However, there was a sticker on the bottom which turned out to be the FCC ID. A search gave me lots of cool datasheets. Even telling me that the modulation is ASK.
I did notice two things though.
1) There are 6 contact points not soldered to anything that lead directly to the chip on board. GND, p5.6, p5.5, p5.4, RESET, VCC (these look like fun to mess with. I think that they're a way to reprogram the IC)

2) there are some slight differences in the circuit of mine and the one in the picture of the FCC. Mine has a capacitor the FCC's doesn't and mine is missing a diode that the FCC's has. My theory is that mine transmits intermittently and the FCC's transmits constantly. (Their pictures, my pic 1, my pic 2)
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Last edited by C222 : 07-01-2010 at 02:20.