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Unread 01-02-2015, 17:31
terps1 terps1 is offline
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Sensor to measure velocity

Hi everyone,

I am new to electronics and new to the forum.

I am wanting to develop a device similar to this (for personal use)...

http://www.tendosports.com/TENDO-Units.html

I am having a tough time designing the actual device (havent touched arduino yet)

My idea is this:

Measure bar average and peak velocity.

Specs:
String length up to 3m
Digital output from rotary sensor
Minimal tension on the retractable string (3-6 oz)
High accuracy
Keeping cost to minimum ($100-$150) for materials only.

So far my thoughts are

microcontroller
String pot or rotary encoder
tensioner as in a id badge retractor
fishing line or thin durable string (teflon coated)

Is this doable? Any advice?

Thanks
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