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I can't afford a chrony but have been looking for how to do a speed test, I found this web site<br>after countless hours of searching on how to make your own -<i>shooting chronometer. </i>all you need here<br>is a PC and sound card and some free software. Enjoy! <img src="http://illiweb.com/fa/i/smiles/icon_biggrin.png" alt="Very Happy" longdesc="1"><br><br><a href="http://www.inpharmix.com/jps/Jims_chrono.html" class="postlink" target="_blank" rel="nofollow">http://www.inpharmix.com/jps/Jims_chrono.html</a>
 

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I love the idea so much I started already looking for phototransistors on Ebay. It didn't last long once I realised how crappy I am with electronics and how many things will go wrong with it...
 

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Im from Holland, isnt that weird?
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Cool, you may only see some problems with shooting directly over it, but i think that'll be allright
 

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Think it would help to attach led lights above the phototransistors? It Should act as a projector and cast a bigger direct shadow of the ammo the closer to the led you shoot?<br>Also probably make it more possible to shoot at dark places.
 
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