Hi friends,
first of all, excuse-me for my Biiig delay in posting this message.
I was on vacation and far away from computers ! It was hot and sunny and very peacfull and there were girls and drink and all the other things.
Well, IÂ'm doing my speedometer using a processor.
The Timer 0 counts a 250 MS period and Timer 1 works as a pulse counter.
I know that my Opel Corsa has a Speed Sensor (VSS) which could be used to give me the right number of pulses for each carÂ's wheel revolutin (i guess it is 8 pulses / revolution in a 14 inch wheel)
IÂ'm trying to do a Schmitt Trigger with a Ne555 to capture de pulses from a sensor
The problem is that in this bad country no one wants to give the right information about the sensor. Everybody wants to sell the information in book for about US$ 80,00 ! ! ! ! ! !
have you ever did something with carÂ's Speed sensor ? Is the output of this kind of sensor in low voltage enough to work with the 555 ?
If you have any information about the speedometerÂ's implementation... Anything.... Iwould be happy !
thank you !
Sérgio
There is really no point in discussing schematics until you've confirmed that this is the sensor that is actually fitted in your car!
Or, at least, that it's the same type of sensor.
Have you done that yet?
Of course, this is not the right forum for discuccing schematics at all - it has nothing whatsoever to do with Keil software tools, does it?!
"There is really no point in discussing schematics until you've confirmed that this is the sensor that is actually fitted in your car!"
For instance, see takes its reading from the position of the speedo needle" (my emphasis)
If your car is the same, then it will require an entirely different approach from the link you posted!