Converting signals for transmission sensor 1

[Azraelo]

Hello!
So I'm replacing a transmission in a truck and the speed sensor (in the output shaft of each transmission) is not the same.
According to my oscilloscope, these are the signals from old speed sensor. (rectangular waves)

And these are the signals from the new speed sensor. (rectangular waves too)

I would like to implement a circuit (perhaps in a protoboard) in order to "translate" the output signal of this new sensor (SENSOR 2) so the ECU can see what it wants to see.
Any suggestions are welcome.

Please your kind help.
Thank you!

 

[GregLocock]

Have you considered an Arduino? 7.5 v out might be a bit of a challenge, so you might need a simple amp as well.

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

http://eng-tips.com/market.cfm?

 

[IRstuff]

Please refrain from double posting

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert!

https://www.youtube.com/watch?v=BKorP55Aqvg

faq731-376 forum1529 Entire Forum list

http://www.eng-tips.com/forumlist.cfm

 

[bradrs]

Often times sensors like that are open collector outputs, meaning they simply ground, and then the ECU has the pullup resistor in it to create the high side voltage of the signal. I assume pins 1 and 2 are the power and ground for each sensor? Did you verify the 2 different sensors require the same voltage for power and ground? When you measured with the oscilloscope, was that with the pins 3 and 4 disconnected from the vehicle wiring, or were they wired in?

There are some ready made products out there that will scale the frequencies by a ratio. I don't know if any will add that offset of 4, but the ratio part is pretty easy. Here's an example of one:

https://www.yellr.com/yb_home.htm

I have no affiliation with it, they were just the first link in a google search.