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microview logic levels?

Posted: Sun Oct 05, 2014 4:15 am
by povezi
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:

Re: microview logic levels?

Posted: Sun Oct 05, 2014 10:11 am
by Ross Robotics
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.

Re: microview logic levels?

Posted: Sun Oct 05, 2014 12:50 pm
by povezi
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 ... -5v-132934


Re: microview logic levels?

Posted: Sun Oct 05, 2014 1:33 pm
by Ross Robotics
I recommend this one,

This one doesn't have an IC that could get damaged just by touching it..

Re: microview logic levels?

Posted: Mon Oct 06, 2014 5:26 am
by scotta
povezi wrote:Here is the converter ... -5v-132934
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!

Re: microview logic levels?

Posted: Thu Oct 23, 2014 5:24 pm
by awardblvr
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

5V-3V IIC UART SPI 4 Channel TTL Level Converter Adapter Module For Arduino 6Pin

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.