[Cialug] OT: continuity test

[John D. Todd - Internet Solver, Inc.]

You may just want to consider something like these:

http://www.zzounds.com/item--STOCT2

http://www.zzounds.com/item--BEHCT100

$30 + s/h might be worth your time making something.

Basically you want a cable tester that will do 1/4" TRS cables.

JT

David Champion wrote:
> For you electronics gurus out there...
>
> For our SCCA autocross timers, we have a set of cables that go from the 
> timer head unit, to a photo sensor head out on the course (similar to a 
> garage door safety sensor, bounces a light off a reflector). The cables 
> have 3 conductors, we're using a fairly light gauge stranded wire, 
> probably about like what's in ethernet cable. The connectors are 1/4" 
> stereo headphone jack style (3 connectors). The cables may be up to 
> about 250 feet in length.
>
> Occasionally someone will get off course and run over one of the cables 
> with their car, and they get some rough treatment at times, may get 
> kinked, and get dragged around parking lots. I'd like to have some kind 
> of way to do a quick cable test on them during setup to help shorten the 
> troubleshooting time, so we'd know whether or not it's a cable issue, or 
> another issue with the photo sensor.
>
> Anyone have an idea of a simple device we could build to test the 
> cables, or would we be better off using a multi-meter, or another 
> pre-existing device?
>
> -dc
>
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