help to build digital car speedo meter

Status
Not open for further replies.

Thread Starter

kamalsolimen

Joined Oct 3, 2014
18
hello

i start to build digital car speedo meter i have honda civic 93

i dont know Vehicle Speed Sensor output its frequency or voltage , mhz = volt = speed

i will use pic16f877a and LM2907 if output is frequency

and i need help to build circuit digram

thanks
 

MaxHeadRoom

Joined Jul 18, 2013
28,761
At one time the output was taken from the final shaft of the gearbox, now, electronically, I am not sure at what point they take it from, but the common way is by a hall or similar sensor.
Why use the LM2907? Keep it pulse timing instead of going analogue.
Max.
 

Wendy

Joined Mar 24, 2008
23,457
The owners of All About Circuits has elected not to host discussions of automotive electrical system modifications/enhancements due to safety concerns, the potential of legal ramifications and the possible circumvention of vehicle regulations at the state and federal level.

This thread is against the AAC forum rules, Chapter 6, as seen here:

6. Restricted topics. The following topics are regularly raised however are considered “off-topic” at all times and will results in Your thread being closed without question:

  • Any kind of over-unity devices and systems
  • Automotive modifications
  • Devices designed to electrocute or shock another person
  • LEDs to mains
  • Phone jammers
  • Rail guns and high-energy projectile devices
  • Transformer-less power supplies
This can be found in our Terms of Service (ToS)

Automotive modifications of any kind are strictly forbidden. Therefore, this thread will be closed.

Please try to understand the reasons behind this action, and feel free to browse and use the forums.

You might find answers to your questions in one of these forums:

http://forum.allaboutcircuits.com/showthread.php?t=54400

Another good forum that shares many of the same membership is http://www.electro-tech-online.com/ . Good luck.
 
Status
Not open for further replies.
Top