Olimex Support Forum

DUINO => ARDUINO => Topic started by: arc310 on May 09, 2013, 11:10:08 AM

Title: UEXT power with 32u4
Post by: arc310 on May 09, 2013, 11:10:08 AM
Hi,
I would like to use UEXT modules, but need D8 pin for other purposes than UEXT power management.
How can I leave UEXT powered at all times ? Cutting the FET3_E link does not seem to do the job (no voltage on pin1 of the UEXT connector)

Thanks
Title: Re: UEXT power with 32u4
Post by: LubOlimex on May 09, 2013, 04:06:09 PM
Hey arc310,

You can connect the source and the drain of the transistor FET3 (zoom the schematic in its UEXT part - S and D marks are printed). This way there will always be 3.3V on the UEXT.

Best regards,
Lub/OLIMEX