Grove I2C-ADC

Products & Technology Grove
#1

Dear techsupport,

I was wondering if i can use the grove I2C-ADC connector, to connect a GAS-sensor O2 to connect withy my I2C port of the grove outbreakboard which i am using for my microbit BBC. So can i make the next connection?

[micro;bit] to [grove shield for microbit v2.0] to [grove I2C-ADC] to [GAS-sensor O2]

Can this work and if not why not, what is the problem ?

With kind regards,

M. Huisman

#2

Hi M. Huisman,

<div>
  <p>No, you can not. The Grove shield for micro:bit v2.0 is 3.3v and the Grove I2C-ADC voltage is 5v. </p>

1.

The Grove shield for micro:bit v2.0 is 3.3v


2. the Grove I2C-ADC voltage is 5v: the ADC chip voltage is (R7+R10)/(R5+R7+R10) * 5v=3.3v. If you replace the 5v to 3.3v, the ADC chip voltage will be 2.2v. NOT working.


Thanks

best rgds
Bill
#3

Dear technical support,



I was wondering how can I read analogy the o2 sensor with the use of a Micro:bit ? My thoughts is analog is just analog right ? Then Why is there a difference between the read analog signal with the uno and the read analog with the micro:bit?



Many Thanks for your help!

#4

Hi M. Huisman,

Please try below library. I will do the calibration at the beginning.

https://github.com/SeeedDocument/Grove_Gas_Sensor_O2/raw/master/resources/Read_O2_value.zip

Thanks

best rgds
Bill