design digital speedmeter circuit

Thread Starter

praveenpp

Joined Aug 6, 2010
4
hi everyone,

i am electronics student. i need to design circuit for digital speedometer. max of two 7 segment display can use. pls anybody help me.
 

tom66

Joined May 9, 2009
2,595
What have you done so far?

How are you even measuring speed? If this is for installation in a car, then you can use a tachometer to measure wheel speed and calculate road speed from the wheel's diameter.

Or, you could use a GPS module. GPS modules are low cost (here I can buy one for about £20), and they give a relative speed output if they have a good enough signal. It would then be trivial to display this on the displays.
 
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