[Cialug] OT: continuity test

[Lathrop Preston]

Let me take a quick look around I think i have plans for a coax tester that
can be trivialy modified.

On Thu, Jul 2, 2009 at 3:38 PM, Bryan Baker <ka_klick at mac.com> wrote:

> Oops, I meant 1/4"
> Actually, come to think of it that's the same as a regular TRS cable
> used in a lot of patch bays etc, so there may be existing audio test
> boxes out there (I know for sure there are for Mic Cables). You could
> probably adapt a Mic cable tester by using Female 1/4" TRS->XLR (mic
> cable) adapters
>
>
> On Jul 2, 2009, at 3:33 PM, Bryan Baker wrote:
> > For those a multi meter should be pretty easy to use, just set to
> > continuity, touch one lead to each tip, then each ring then each
> > sleeve.
> >
> > You could also build something w/ 2 1/8" stereo jacks, a battery, some
> > LEDs and iirc, you'll also need some resistors, to get the LEDs to
> > work, but it should be a pretty easy circuit to just light an LED for
> > each of the conductors if contact is made. I'm just rusty enough, I
> > can't draw you the schematic, but it should be pretty basic.
> >
> >
> > On Jul 2, 2009, at 3:23 PM, 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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> >
> > --
> > Bryan "ka-klick" Baker
> > Singer/Songwriter
> > ka-klick at ka-klick.com
> > http://ka-klick.com
> > http://twitter.com/ka_klick <-- Twitter Feed
> >
> >
> >
> > _______________________________________________
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> > Cialug at cialug.org
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>
> --
> Bryan "ka-klick" Baker
> Singer/Songwriter
> ka-klick at ka-klick.com
> http://ka-klick.com
> http://twitter.com/ka_klick <-- Twitter Feed
>
>
>
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>



-- 
=====================================
Lathrop Preston
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