For any discussion not specifically related to your project
By rallikuski
It is possible now connect VSS signal to RPM2 input trought vr conditioner at 202402 firmware?
So how to wire RPM2 input?
I have 12v square wave signal from speedo.
I allready tried to put that signal to RPM2 input and changed VSS input pin from "board default" to "pin18" from tunerstudio and there is nothing happening...
Do i need to wire RPM2 negative fron conditioner to earth too? I tried that too and nothing happened :shock:

Sorry foor noob questions :oops:
By sparkness
you will need to have the pull up resistor in place if using a 3 wire hall effect type sensor
hall pullup.png
hall pullup.png (55.5 KiB) Viewed 221 times
User avatar
I would suggest using an aux input for this, as the code may not react well to pin 18 input. To route a 12V hall signal to a Mega pin, use a diode inline to block high-voltage, only allow grounding by the sensor, and a 5V pullup on the board to create a functional and safe 5V-0V square-wave signal to the processor. A level-shifter. This method has been used on many projects:

SENSOR SIGNAL > DIODE (cathode toward sensor) > 5V pullup > Mega


Hi PSIG. I really appreciate the help. I have no[…]

Of course, I will likely seize a cylinder and inc[…]

speeduino injector

What is the maximun resistance for nozzles is 14[…]

Hi all, i'm from Brasil, here is very dificult t[…]

Still can't find what you're looking for?