How to make Digital Speedometer?

[default]

Hi
Anybody can tell me how to make a Digital Speedometer, i would be happy
if someone can tell me properly with everything need to
make?..including PCB layout, circuit, calibartion stuff, etc.
regards,

Not too likely. You have to specify what you want it for, what speed
range, what your level of competence is, and what research you've
already undertaken to get what you want.

Thought about using a bicycle speedometer - ready made for a few
dollars?

 

[RsK]

Hi
Anybody can tell me how to make a Digital Speedometer, i would be happy
if someone can tell me properly with everything need to
make?..including PCB layout, circuit, calibartion stuff, etc.
regards,

 

[Homer J Simpson]

Anybody can tell me how to make a Digital Speedometer

For what? Bike, car, turtle?

 

[Donald]

Hi
Anybody can tell me how to make a Digital Speedometer, i would be happy
if someone can tell me properly with everything need to
make?..including PCB layout, circuit, calibartion stuff, etc.
regards,

Google has your answer:

http://www.google.com/search?hl=en&q=Digital+Speedometer+kits

It would take too long and too much heartburn to teach you.

Just buy it.

donald

 

[Bill Kaszeta / Photovoltaic Resources]

Hi
Anybody can tell me how to make a Digital Speedometer, i would be happy
if someone can tell me properly with everything need to
make?..including PCB layout, circuit, calibartion stuff, etc.
regards,

Consider using a small GPS unit, most can display speed.
Bill Kaszeta
Photovoltaic Resources Int'l
Tempe Arizona USA
[email protected]

 

[Le Chaud Lapin]

Hi
Anybody can tell me how to make a Digital Speedometer, i would be happy
if someone can tell me properly with everything need to
make?..including PCB layout, circuit, calibartion stuff, etc.
regards,

Make quadrature encoder, feed latched output to LED hex block after
sampling quadrature counter at fixed intervals (use 555
http://www.uoguelph.ca/~antoon/gadgets/555/555.html).

If you cannot use photodiodes, direct contact between stator and rotor
is possible (with all concomitant problems), or with some complexity,
you could even use magnetic induction in sensing circuit.

Look at the bottom of this page for "quadrature".

http://www.vias.org/feee/counters_04.html

-Le Chaud Lapin-

 

[Tam/WB2TT]

Make quadrature encoder, feed latched output to LED hex block after
sampling quadrature counter at fixed intervals (use 555
http://www.uoguelph.ca/~antoon/gadgets/555/555.html).

If you cannot use photodiodes, direct contact between stator and rotor
is possible (with all concomitant problems), or with some complexity,
you could even use magnetic induction in sensing circuit.

Quite likely it's all there already. My understanding is that on many newer
cars the "analog" speedometer is actually electronic. He needs a service
manual for the car.

Tam

 

[abhi]

you need a hall sensor from which u can get square pulses with duty
cycle depending upon speed.. u can say that is a pwm type of signal.
now u assign bits through mathematical formula or here algorithm for
duty cycles, ofcourse after ADC. u use proper interface to LCD.. it is
simple u just start and try dud..

 

[[email protected]]

Homer J Simpson a écrit :

For what? Bike, car, turtle?

IF the answer see here ...
http://www.edn.com/contents/images/529384f1.pdf

 

[Homer J Simpson]

IF the answer see here ...
http://www.edn.com/contents/images/529384f1.pdf

http://www.edn.com/article/CA529384.html