[Tinyos-help] about analog input of tmote sky

[Joe Polastre]

The sensor and mote must have a common ground, so the ground of the
sensor must connect to both the mote and the ground of your 5V power
supply.  As long as the analog output does not exceed 3V, it can be
connected directly to the mote's analog inputs.

-Joe

On 7/29/07, Chen Bleed <bleed1979 at hotmail.com> wrote:
>
>  Hello, all
>
>    I am a rookie of mote world. Now I have a tmote sky and want to transmit
> signal to the analog input on it. I see the expansion pins may help and I
> find pin 3 is a analog input. Then, I have a problem.
>
>    I use Sharp GP2D12 IR sensor. It has one 5V Vcc , one GND and one analog
> output among 2V. If I set up this sensor(Vcc and GND) and code for tmote sky
> already. May I just connect one analog output of IR sensor into analog input
> of tmote sky ??
>
>    Because I know tmote only has not over 3 V voltage, I dont use its VCC
> and GND in expansion to connect to IR sensor(needs 5V). So, just one analog
> output line of IR sensor can do anything??
>
>  thx, all and sorry for my bad English.
>
>  Chen, Chien Mao
>
>
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