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Advice would it be cheaped to build a chronograph?

Discussion in 'Anything Airgun Related' started by Timothy095, May 1, 2012.

  1. Timothy095

    Timothy095 Junior Member

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    lads, i've been thinking to myself and i've asked my technology teacher in school would it be possibe to make a chronograph cheaper than you could buy one. it will be easy to make the outer case as i've got access to a laser cutting tool for precision. can you buy the chrono components seperately?

    cheers:D
     
  2. Barcelona68

    Barcelona68 Banned

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    Surely you're better off just buying one. They're only £40 ...
     
  3. theobencarbine88

    theobencarbine88 Post Whore

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    Or a bit less if you can pick up one 2nd hand on here.. paid £35 inc postage for mine. CB625 mk4, does the job fine :up: ... Probably could make one cheaper than buying the F1 chrony for almost £100
     
    Last edited: May 1, 2012
  4. PLauGE

    PLauGE Engaging Member

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  5. megga

    megga Busy Member

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    If you think you can make one, then have a go, it gives you more understanding of things if you build them your self. Keep us updated
     
  6. andy draper

    andy draper Post Whore

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    http://www.chronoscopes.com/
    here's all the bits you need for the most common one used the 625,the only thing you have to work out is how to calibrate it as they come with a number on the back which you enter on the site.The bloke who makes them is called robin,ring/email him what you are doing i'm sure he will help you out he is a really great bloke.
    andy.
     
  7. 1961nuffield

    1961nuffield Super Moderator Staff Member Mod/Admin

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    Why not have a go, it sounds like an interesting project which might actually be useful!

    John
     
  8. Baneat

    Baneat Well-Known Member

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    How would this work? I was thinking it'd be similar to measuring the instant speed of a little car in high school. You take two lasers a few centimeters apart, measure the time difference from when the signal was broken and do the simple calculations to get the speed.
     
  9. andy draper

    andy draper Post Whore

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    when i was at school we didn't have centimeters let alone lasers:confused:.You will i would think have to work in imperial not metric as it's feet per sec and foot pound.You are talking fractions of a second take 500 fps say and work out what that is in inches per second just to give you an idea of the maths and speed involved,if you put the lasers 1" apart about 2.5cm,hopefully that gives you a firm base to start from.What the heck do i know i made a letter rack that fell apart on the bus on the way home for my woodwork project.
    andy.
     
  10. ithica -john

    ithica -john Post Whore

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    you were lucky...mine was an oak side table

    Dad said...''.aah.. dry kindling''............:down:
     
  11. Tmaxxjj

    Tmaxxjj Busy Member

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    I made a laser lap timer for me remote controlled car. Had to do all the research myself cause our systems and control teacher knew b****r all about the chips I was using! This was 10 years ago mind!
     
  12. chrisfrain

    chrisfrain Engaging Member

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    I saw a website/ blog that showed a home made chrono. The fella wired light diodes to headphones jacks that were in a certain length tube. He then used audio inputs on a pc and sound software to work out the time, when the pellet passes the first diode it shows as an audio spike and starts counting
     
  13. Stot

    Stot Post Whore

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