About Us Knowledge Base Community Forum Electronics Toolbox FAQ Shipping & Delivery

Community Forum

Share your projects and post your questions

Search
Register or Sign In
Forum

How to connect ADC Pi and ADC Differential Pi

71 Views - Created 29 days ago

29 days ago

Posted by:
jevers99

Users Avatar

Hi,

 

We're trying to replicate a project we've found on the web - https://spin.atomicobject.com/2014/10/12/raspberry-pi-current-power-meter/ which uses an ADC Pi and an ADC Differential Pi. How do these boards connect to each other, and to external voltages?

Many thanks,

Jon

28 days ago

Posted by:
andrew

Users Avatar

Location:
United Kingdom

Users Twitter  Users Website  

Hi Jon

If you use the same circuit diagram shown on the website you linked to you would use the ADC Pi for the top ADC with the IN pin connected to one of the input channels and the ADC Differential Pi for the lower ADC with the IN+ connected to + input and the IN- connected to the - input.

The SDA, SCL, VDD and VSS pins show on the diagram for each ADC would be connected through the Raspberry Pi GPIO header when you stack the ADC boards on top of the Raspberry Pi.

You will need to make sure the Vdd voltage connected to the shunt resistor does not exceed 5V and the voltage across the shunt resistor does not exceed 2.048V.

AB Electronics UK Tech Support

28 days ago

Posted by:
jevers99

Users Avatar

Apologies for so many questions. I've seen other boards with IN+ etc marked on them, what is the equivalent on the ADC Differential Pi board?

28 days ago

Posted by:
andrew

Users Avatar

Location:
United Kingdom

Users Twitter  Users Website  

The IN+ pins are the inner row of input pins with a + on the end.  The IN- pins are the middle row with a - on the end. 

The image below should explain it better.

Post image

AB Electronics UK Tech Support

28 days ago

Posted by:
jevers99

Users Avatar

That is fantastic, thank you

Note: documents in Portable Document Format (PDF) require Adobe Acrobat Reader 5.0 or higher to view, download Adobe Acrobat Reader or other PDF reading software for your computer or mobile device.