[time-nuts] GPS->audio interface

[John Nordlie]

> 
> I'm looking for a way to take GPS time and generate a signal that can be recorded on the audio track of a video recording to time stamp it. This is so it can be aligned with other data that's collected with GPS based time.  It needs to be portable/small (i.e. Something you could attach to a small camcorder, or such).
> 
> Seems that a GPS->IRIG B interface would work, but I was wondering if someone has done this already (e.g. Someone must have made a IRIG encoder in a PIC or similar)..
> 
> Another alternate is if something like a iPhone records accurate time with the video stream. (another of the data sources is an iPhone recording something else)
> 
> I think the basic requirement is accuracy to some few milliseconds (e.g. Frame rate of the video)..
> 
> (It's for a high school science project, where they want to record various things, and line them up.. I think they could deal with looking at the timestamps over many frames to do interpolation)
> 
> Anyway, cheap and cheerful consumer gear is what is sought. (so no suggestions of synthesizing SMPTE from the output of my Z3801 and feeding it to a RED camera.. We're talking AIPtek and iPhone here..)
> 
> Jim Lux

Maybe this is what you're looking for:

http://www.redhensystems.com/