How to design a speed sensor circuit with a monitor

[peter7139]

Hello guys,

I want to design a speed sensor which can sense the speed of a roller coaster and put the circuit on the track. Then, the circuit can transmit signals to a monitor that is about 100m away form the sensor to show the speed of the roller coaster.

Is there anyone know how to design it?

I want to use a hall effect device to sense the speed but I don't know how it can show the speed on a monitor.

I am still doing a lot of research on it. If anyone has similar experience or useful information. Please that me know.

Thank you very much!

 

[Skogsgurra]

I think that the kind of engineer Peter is - or is not is of secondary imporance. This thread has brought up several ideas and quite a lot of contributions. Peter may not be a seasoned engineer, and his ideas about how to select a capacitor seem less mature. But still, he is on his way. And we shall not discourage him.

Gunnar Englund

http://www.gke.org

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Half full - Half empty? I don't mind. It's what in it that counts.