[Cialug] OT: continuity test

[Bryan Baker]

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
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>
>
>
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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