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EWolc
New Contributor I
1,517 Views

How to use mini breakout board with 3.3v and 5v logic boards

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I am planning on using the Edison with GPS and 9DoF boards (http://www.adafruit.com/product/1714 http://www.adafruit.com/product/1714 and http://www.adafruit.com/product/746 http://www.adafruit.com/product/746).

Both work simultaneously on an Arduino Uno or as one uses pins 4&5 and the other uses TX & RX. The problem is I would like to use them with the mini breakout board which uses 1.8v logic. Not 3.3v or 5v like the GPS and 9DoF do.

My question is how can I use the Edison's 1.8v logic provided by the mini breakout with the 3.3v and 5v logic accepted by the GPS and 9DoF boards. Is it possible (and if so how) or should I just use the Arduino expansion board.

Either way any advice is appreciated.

1 Solution
Carlos_M_Intel
Employee
84 Views

Hi PrescottJoule,

In order to use the Edison Compute Module with shields and devices that work with 3.3V or 5V you must use a voltage level translator that allows you to convert the voltage of 5/3.3V to 1.8V. You can buy a shield for this or you can create your own one with some transistors.

Regards,

Charlie

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6 Replies
Carlos_M_Intel
Employee
85 Views

Hi PrescottJoule,

In order to use the Edison Compute Module with shields and devices that work with 3.3V or 5V you must use a voltage level translator that allows you to convert the voltage of 5/3.3V to 1.8V. You can buy a shield for this or you can create your own one with some transistors.

Regards,

Charlie

View solution in original post

EWolc
New Contributor I
84 Views

Do you have any suggestions for level shifters that would work for high speed communication? On another thread someone found that using I2C did not work on their level shifter, is this a common problem that I need to look out for or just a rare scenario?

Thanks

MCara4
New Contributor III
84 Views

Hi PrescottJoule,

have you looked at the level shifter used in this board: https://www.sparkfun.com/products/13034 https://www.sparkfun.com/products/13034 or the other boards of the Block family?

I didn't used it but Sparkfun is serious vendor and it will likely works well.

EWolc
New Contributor I
84 Views

Thanks massca,

I'm thinking about using this one https://www.adafruit.com/products/757 https://www.adafruit.com/products/757 because I'm using multiple serial devices and it claims to support I2C, SPI and TTL Serial so my devices (at 9600 baud) should be fine. Great suggestion though, I had looked at that one initially.

MCara4
New Contributor III
84 Views

Hi PrescottJoule,

it seems the right product, please let me know if it will work well.

EWolc
New Contributor I
84 Views

I post my results when I'm done.

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