DIY Clearcom Call Signal Flasher

[willbb123]

I basically want to make on of these:

I have read this thread (http://www.controlbooth.com/forums/s...-diy-cans.html) and I am thinking that I can just take the right LED and some resistors, connect it to the right pins and it will work. But I know that it will be more complicated then that...

I see no reason to have a tone, it would be nice to have a brightness control, but if its only a single LED I dont think its necessary. It really doesn't need to flash, just light up when the call button is pressed.

Has anyone built something like this, or have any ideas to where I could get started?

[Eboy87]

Almost been discussed here.

[willbb123]

I am not familiar enough with resistors to design my own. I really dont wanna screw up our clearcom system.

Can someone make a diagram and a parts list?

[willbb123]

Originally Posted by porkchop

So basicly go from pin three through an appropriate resistor (found easily at Current limiting Resistor calculator for leds to an LED of your choosing. Then to tie it all together, I assume pin 1 for a ground???? If so the most expensive part is the XLR connector (or maybe the LED if you want a really big one) and like 30 minutes of time. Easy enough project

Originally Posted by Andy_Leviss

Yup, you're spot on. LED and resistor between pins 1 and 3, and away you go.

This parts are all here. I just dont know enough about resistors to pick the right one.

[willbb123]

Here is what I have so far,

XLR JACK
XLR Panel-Mount Audio Connector - RadioShack.com

Box
Project Enclosure (3x2x1") - RadioShack.com

Im thinking this LED because it has the holder.
Red LED with Holder - RadioShack.com

Im hoping I can go to radio shack tomorrow after-noon so we have this for our shows this weekend.

Thanks guys

[Chris15]

OK, so based on that LED.
Forward Voltage = 12v
Current draw = 15mA
Supply voltage = 30v

So V drop = 18v
R = V/I = 18/15m = 1k2
So you need a 1.2k resistor.

P= VI = 18*15m = 0.27W
So better make that a half watt resistor for good measure.

Remember that pin 3 is + and pin 1 is ground.

You might make your unit more versatile by adding a male connector as a loop through....

[gafftapegreenia]

This seems deceptively simple.

But I think I want mine in incandescent.