Hi Paul: I'm presently adapting a chrony chronograph because I want to use the triggers for timing and other purposes. They've spent a LOT of engineering time to get proper triggering, and the triggers can easily be pulled off without disturbing the basic unit. The triggers are robust and will drive a piece of coax with a nice pulse at a 5 v level. The cheapest chrony is under $100 and using their triggers will save you HOURS and HOURS of fiddling around, trust me! You can use something like an arduino which has two interrupt inputs to do the time measurement, or as Tom suggests. Don
Paul Cianciolo > Hello Folks > > I have been looking at bullet chrographs and wondering if I could get > the a usb module to do a interval measurement and display on my laptop. > on a yet to be discovered module to calculate the time interval between > the pulses? > > The bullet travels at approx 1050 feet per second. > By spacing my gates providing the start stop pulses precisely 1 foot > apart I think a direct read out except for the decibal point being in > the wrong place . > > Does this seem fesable? > > Here is one module I found http://www.weedtech.com/index_eventcount.html > > Any thoughts on this? > The reason for the USB would be for display on my laptop at the firing > range > > Thank you for any help I would really appreciate it > > PaulC > W1VLF > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > -- "Neither the voice of authority nor the weight of reason and argument are as significant as experiment, for thence comes quiet to the mind." R. Bacon "If you don't know what it is, don't poke it." Ghost in the Shell Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 www.lightningforensics.com www.sixmilesystems.com _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.