Need speed pulse generator schematic diagram

[autodiags20]

Hi,

I need easy schematic diagram for speed pulse for old cars passat b4 audi c4 mb 210. with n555 .

Thanks for help

[marte690]

you can also use google !!!!!

[taihei]

Can i ask, what component at speedo to inject this pulse? If it is going to microcontoller..through what component need to look for?
Tried before to roll mileage by varying voltage at gauge motor,didn't work.

[billykillkelly]

u have to make oscilat?r same like marte690 first than buy an colone xprog-m 4.5 from mr huang than take out of xprog m from the box put it in that you hand made oscilat?r thats what i did))lol)))

[yzfr1]

u have to make oscilat?r same like marte690 first than buy an colone xprog-m 4.5 from mr huang than take out of xprog m from the box put it in that you hand made oscilat?r thats what i did))lol)))

My be I should do same think cos I need the box to lol

[billykillkelly]

[hehe bro but that kind of boxes little to expencive))))))):p