0-5v output

Support forum for the Lambda Shield designed to connect Bosch LSU 4.9 wideband oxygen sensors to Arduino projects.
Stevo
Posts: 3
Joined: 18 Apr 2018 12:58

0-5v output

Postby Stevo » 23 Apr 2018 21:48

Hello,

Is there a analog output (0 - 5v) on this shield? I want to connect it to our dyno software as it can read analog voltates between 0 and 5 volts. Please tell me how i can do this.
Thank you!

User avatar
Christian_Bylund
Posts: 24
Joined: 07 Mar 2015 18:09

Re: 0-5v output

Postby Christian_Bylund » 23 Apr 2018 23:24

Stevo wrote:Is there a analog output (0 - 5v) on this shield? I want to connect it to our dyno software as it can read analog voltates between 0 and 5 volts.


Hi again Stevo, as a matter of fact the Bosch CJ125 itself has a 0-5V output, more or less. You can access it from the Analog 0 pin of the Arduino / Shield. In the technical manual and schematics you are looking for what is called CJ125_UA. With the voltage you can convert this value to a lambda or AFR value as described in the technical manual.

How the voltages correspond to lambda values can also be seen in the Bosch data sheet of the sensor. Look in the column v=17 as this is the default amplification for the shield.

Be aware that this is not a professional dyno tool, it most certainly can be used as one. Just make sure you are not picking up interferences or run in to vibration issues with connections.

Good luck!
Best Regards,
Christian Bylund
Bylund Automotive AB