Wierd Acting of my arduino

Other Hardware General Electronics
1

Hello

My problem is that my arduino loses his programm (or ist stuck in the boot seqcence) i use the nano in my tracktor to observe the engine and fuel level...

I olso meserure the voltage of the battery and when i turn the tracktor on my arduino freak out after 10-20 sekonds i think that the loading circut fuks around whith the board...

Is there a way i can messerure tje voltage without conecting the circuts ?

Thanks (my englisch ist not the yellow from the egg)

2

Sounds like you have a lot of electrical noise in the Arduino power supply. Automotive and farm equipment wiring can be very hazardous to electronic equipment.

That is a serious problem, but has nothing to do with Arduino. Solve it by following good electronics design principles: proper power supply regulation and filtering. See https://www.st.com/resource/en/application_note/cd00181783-protection-of-automotive-electronics-from-electrical-hazards-guidelines-for-design-and-component-selection-stmicroelectronics.pdf

3

Jea i have removed all electronics everything is new and the power suplly for my arduino is a bought voltage regulator

4

Then look at how you have placed the wires connecting the sensors. Did you use shielded wire with only one end of the shield connected to the tractor frame? If not, replace your wire with shielded wire.

5

I have the arduino on a perf borad with wire terminals (so i have no wires) only the battery voltage wieres connectet to the terminals and 2 resistor (voltage devider)

6

Then how do all the other device listed in your first posting get read? Is your tractor Diesel or gas? Does the problem occur just when you start the engine or if you connect the Arduino after the engine is running?

7

It is a diesel engine
Fuel is mesured via a ultrasonic modul
Temp is a 10k resistor
Oil pressure is just a pressure swicht
For the ligning i use 8 relays

It is only when i turn the engine on i think the problem is that the alternator/regulator send some wierd voltage

8

You can easily confirm that by disconnecting the wire from the alternator to the regulator.

9

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