Car battery

[Racinggreen]

Hi Christian,

i plan to use the lambda shield in my old car to measure the air/fuel ratio for adjusting my carburetors.

My question is now can i attach the board directly to the car battery? And is there something i have to take care of?

Cheers

[Christian_Bylund]

Hi Christian,

i plan to use the lambda shield in my old car to measure the air/fuel ratio for adjusting my carburetors.

My question is now can i attach the board directly to the car battery? And is there something i have to take care of?

Cheers

Hello,

No problem, just connect the battery to the lambda shield, use the X7 jumper to also power the Arduino from the shield.

[Racinggreen]

Hi Christian,

thank you for your fast response I have following questions:

1. I can‘t see any fuse, EMI filtering or transient voltage suppression in your circuit aren‘t these features which might needed to get integrated for safe operating?

2. Since I have a twin carburetor and two exhaust pipes where one pipe is covering 3 cylinders each outcoming of the manifold I want to use two shields. Since two shields mean higher current draw do you think this is ok for the car battery?

3. As far as I understand there is a calibration needed before the sensor can work? How do I deal with it, can I start the motor right away or should I start first the lambda shields and wait to then start the motor? I‘m asking because when I start the motor and the lambda shields are cold I will still have a combustion happening which results in exhaust gases, will these disturb the calibration?

Looking forward to your answers.