[Tinyos-help] GIO1/ADC2 on Tmote

[Joe Polastre]

ADC2 is output and low.

GIO pins can only source ~2mA of current, so I don't recommend using
them to power a device.

-Joe

On 9/3/06, Simon Davis <simondavis at mail.com> wrote:
> Hello,
>
> I'm trying to use GIO1 as a power source for a sensor so I can turn it on and off to save power. If I put a voltmeter on the pad of R16 I get the battery voltage of about 3V appearing as it turns on. If I solder a 0ohm bridge on R16 to feed it to pin 7 of the 10 pin header (which is also used by ADC2), the voltage drops to about 1.3V and it draws over 30mA - this is without any load on pin 7.
>
> What am I doing wrong!? It's presumably something programmatic. I'm using TOSH_MAKE_GIO1_OUTPUT() and then turning it on and off with TOSH_SET_GIO1_PIN() and TOSH_CLR_GIO1_PIN(). Should I do something with ADC2 and why is the voltage dropping and 30mA being drawn?
>
> Many thanks
>
> Simon Davis
>
>
>
>
>
>
>
>
>
>
> --
> ___________________________________________________
> Play 100s of games for FREE! http://games.mail.com/
>
>
> _______________________________________________
> Tinyos-help mailing list
> Tinyos-help at Millennium.Berkeley.EDU
> https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
>