February 13, 2008 at 4:07 am #1517AnonymousInactive
anyone know a trick to making your chronograph work indoors?
without spending 50 bucks! 😡February 13, 2008 at 4:14 am #33733rob3drParticipant
Get a couple of incandescent lights like in an aquarium… tie them up to the top of the diffusers. Dont use florescent lights as the slight flickering will throw off the chrony. Easy enough!February 13, 2008 at 4:42 am #33737AnonymousInactive
I drew this up. I need to find some bulb bases that would screw through a sheet of sheetmetal, held with a finishing nut or something. I guess it’s about how the professional versions are made and is simple enough for me considering I have access to sheetmetal and a brake. A long bolt and wingnut will hold the lamps tightly to the skyscreens.February 13, 2008 at 1:10 pm #33757bodhisdadParticipant
I have to shop lite reflectors which i wrapped the cords around a pipe in the basement so i can raise and lower the lamps when i want. I lower till just above the the skyscreens and everything works well for me. 40watt bulbs will do just fine. These reflectors are the aluminum dome variety for about $2 each. Any home improvement center.February 13, 2008 at 4:40 pm #33770rhodermanParticipant
This cost me $11 to make. Your price may vary though…
They work great, even with the 8′ fluorescent lights on in the shop, and directly above the chrony.
JimFebruary 13, 2008 at 5:20 pm #33773walkonkingParticipantquote Rhoderman:
Now that is an idea I could use! ThnxFebruary 14, 2008 at 2:08 am #33831ragsParticipant
Thanks Jim. I’m on my way to Wally world tonight after I get off work.February 14, 2008 at 1:12 pm #33859bodhisdadParticipant
Jim, good idea, compact, cheap and effective. With the flourescents on, have you experienced different readings then you would outside?? I left my flouresents on and got higher then usual readings? Might be how close they are to my “range” and where the chrony is setup. Just a heads up on the flourescents 5′-6′ away and they add 50fps to my usual readings. Same with my halogen shoplight which i thought wouldn’t be an issue at all, still added velocity to my string, be all good if it was a true reading, but when i turn all lights off except incandescents the numbers drop by 50fps or so. Any light source will give you a reading, but weather or not its accurate is another story, just my experience. Hope you don’t find your numbers drop when you turn off the other light sources. Thought you should know.February 14, 2008 at 4:37 pm #33869tunajussiParticipant
There is two push type led lights (with aaaa batteries) fixed over Chrony, works in a dark room. All kind of led lights wonâ€™t work, they do have probaply wrong frequency or something.
February 14, 2008 at 6:10 pm #33875synopsysParticipantquote WalkonKing:
Adam, no kidding, one small add, drill the holes at an angle so the bulbs sit flat…
Great stuff here, I usually just swing the arm lamp over and turn up the overheads… 😕
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