Speedometer built

911 y a t q · #1 Sep 13, 2007, 05:40 PM

how can i build one Speedometer?

KeepItSimpleStupid · Sep 13, 2007, 05:53 PM

A speedometer is basically a frequency counter with a time base that results in MPH.
The sensors in modern cars gives a pulse for some amount of distance traveled.
You'll need some signal conditioning to the counter.

I don't know, but the OBD system probably includes MPH. Tou might be able to use the diagnostic connector to get this information.



At Ask Me Help Desk you can ask questions in any topic and have them answered for free by our experts. To ask questions or participate in answering them you must register for a free account. By registering you will be able to: Get free answers from experts in any of our 300+ topics. Accept money for answers that you provide. Communicate privately with other members (PM). See fewer ads. Sign Up!