microview logic levels?

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povezi
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microview logic levels?

Post by povezi » Sun Oct 05, 2014 4:15 am

Are digital pins 5V (as std Arduino) or are the 3.3V?

I am thinking of interfacing with raspberry Pi GPIO and I probably need logic level shifter? :doh:

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Ross Robotics
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Re: microview logic levels?

Post by Ross Robotics » Sun Oct 05, 2014 10:11 am

It's 5V logic. With all the information about the microview, I am astonished that there is no mention of it's logic level.. I looked for over 10 min and finally found it by reading the comments from the Kickstarter page.

I am glad I didn't buy one, as I find that there is a lot of info missing for doing real work with this device.
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povezi
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Re: microview logic levels?

Post by povezi » Sun Oct 05, 2014 12:50 pm

Yap that info was missing in microview "spec"...

I have found one lvl shifter and will try not to fry it or my raspberry

Here is the converter http://www.dx.com/p/mini-rs232-to-ttl-c ... -5v-132934

:dance:

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Ross Robotics
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Re: microview logic levels?

Post by Ross Robotics » Sun Oct 05, 2014 1:33 pm

I recommend this one, https://www.sparkfun.com/products/12009

This one doesn't have an IC that could get damaged just by touching it..
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scotta
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Re: microview logic levels?

Post by scotta » Mon Oct 06, 2014 5:26 am

That is not a 3.3V to 5V level shifter. It's a logic level to RS232 level shifter. The logic side levels can range from 3V to 5V. The other side will be RS232 levels (between +/- 5V and +/- 25V).

There's a good chance that you will fry your Raspberry Pi if you try to use it with this converter!

awardblvr
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Re: microview logic levels?

Post by awardblvr » Thu Oct 23, 2014 5:24 pm

The thing I like about these is that they also have a little voltage regulator for 3.3V so that you can power your 3.3V devices directly through this board.

I2C Logic Level Converter Bi-Directional Module 5V to 3.3V For Arduino BSS138 http://r.ebay.com/dd9r2n

5V-3V IIC UART SPI 4 Channel TTL Level Converter Adapter Module For Arduino 6Pin http://r.ebay.com/1KcJWp

There are several others as well... Not sure if Sparkfun has one with the built-in VR. But, It sure makes simple, low-current projects easy.

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