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Topic: cheap wireless communication (Read 8 times) previous topic - next topic

riz

hi
i am in the middle of designing a very simple door alarm.
please can someone help me decide which way to proceed on the wireless side.(data to be transmitted simple  on off) please advise me on the cheapest option. distance max 10m.

also how would i be able to play music through arduino.
thanks in advance

zoomkat

Quote
i am in the middle of designing a very simple door alarm.
please can someone help me decide which way to proceed on the wireless side.(data to be transmitted simple  on off) please advise me on the cheapest option. distance max 10m.


Modify a wireless door bell.

Quote
also how would i be able to play music through arduino.


You could have the arduino operate a transistor which which controls the power to a gizmo that can play music.
Consider the daffodil. And while you're doing that, I'll be over here, looking through your stuff.   8)

biocow

#2
Dec 24, 2010, 07:16 pm Last Edit: Dec 24, 2010, 07:17 pm by biocow Reason: 1
Quote
You could have the arduino operate a transistor which which controls the power to a gizmo that can play music.


Something like this...

http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1289929542
10 PRINT CHR$(7)
20 GOTO 10

u0421793

The Arduino Uno has three fairly large mounting holes. You should be able to play music on one side of the Uno and get the sound to go through one or more of those holes and appear out the other side.

AlphaZeta

Hmm...

Even though all you wanted to is a simple on/off controller, I'd imagine you'd also want this alarm to be some what reliable, correct? This means, you can't just use a simple carrier-only transmitter, and some kind of modulation and coding is needed (i.e. FSK).

So I'd just pickup a pair of RF link transmitter/receiver, like these ones:

http://www.sparkfun.com/products/8945
http://www.sparkfun.com/products/8947

They are pretty darn cheap!

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