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Olimex Support Forum

OLinuXino Android / Linux boards and System On Modules => A13 => Topic started by: buzibus on March 18, 2013, 04:24:09 AM

Title: 5V tolerant GPIO ?
Post by: buzibus on March 18, 2013, 04:24:09 AM

Does the Olinuxino A13 WiFi has 5V tolerant inputs among its GPIO pins?


Thanks
Title: Re: 5V tolerant GPIO ?
Post by: nvd on March 19, 2013, 12:33:14 PM
I don't think that there is any.

Use a simple voltage divider to divide 5 V to 3.3 V.

If you can use an open collector type of driver to drive the input pin, connect a 1 k - 10 k resistor between 3.3 V on the board and the GPIO pin.
Title: Re: 5V tolerant GPIO ?
Post by: buzibus on March 19, 2013, 04:30:22 PM

Thanks
Title: Re: 5V tolerant GPIO ?
Post by: crubille on March 22, 2013, 11:24:56 PM
You can use this mount either for input or for output:

http://daniel.robert9.pagesperso-orange.fr/Digit/images/Fonctionnement_d_un_transistor_NPN_en_commutation.gif

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