[sdiy] LED driver cable length

[Dan Snazelle]

On Sep 12, 2011, at 9:31 AM, Dave Kendall <davekendall at ntlworld.com> wrote:

> 
> On Sep 12, 2011, at 14:07, Harry Bissell wrote:
> 
>> Sounds like a no-brainer. Choose the LED series resistor for the current you want
>> from 5V. Probably that will be in the 220ohm range. Thirty feet of a small gauge cable (28ga)
>> will only account for maybe 5 ohms or so. You're golden.
>> 
>> Drive all the LEDs from the same transistor (parallel) with a separate series resistor for each.
> 
> Thanks Harry. That's simple enough to do.
> 
>> Might want to use 1/4" jacks so you can use guitar cables for all the runs. Then you will
>> always have a spare (for the LED, or for the guitar...)
> 
> Plan is indeed to use 1/4" jacks. You can never have too many of them when out on a gig....
> 
> cheers,
> Dave
> 
> 
> 
> 
> 
> 
> 
>> 
>> 
>> ----- Original Message -----
>> From: Dave Kendall <davekendall at ntlworld.com>
>> To: synth-diy DIY <synth-diy at dropmix.xs4all.nl>
>> Sent: Mon, 12 Sep 2011 08:06:17 -0400 (EDT)
>> Subject: [sdiy] LED driver cable length
>> 
>> Hi Guys.
>> 
>> Hopefully an easy one. The band I'm in uses visual clicks for count-ins
>> in some numbers, so there's a plan to give the drummer and the
>> guitarists a couple of boxes, each with an LED indicator responding to
>> a Midi to clock converter driven from the sequencer in a synth. The
>> plan is to have the unit in a 1U rack, with a couple of ordinary 1/4"
>> TS jack outputs to run to the LED boxes - anode = tip, GND = sleeve.
>> The cable runs would be up to 30 feet.
>> 
>> Can anyone see any potential problems using this scheme? The drive
>> voltage for the LEDs is 5V via a transistor on the board.
>> 
>> Any thoughts welcome.
>> 
>> cheers,
>> Dave
>> 
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>> 
>> -- 
>> Harry Bissell & Nora Abdullah 4eva
>> 
> 
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Very cool idea


One question:
What if u play a show with lots of sun/glare? Are u just using standard size LEDS for indicators?

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