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Talk back kill switch question.
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<blockquote data-quote="Brian jojade" data-source="post: 35433" data-attributes="member: 211"><p>Re: Talk back kill switch question.</p><p></p><p>Getting a light to work should be extremely simple. All you need is an LED on the mic side of the switch that will operate off of phantom power. If the mic gets switched off, the light should be off too. It's best to pull power from both legs of the phantom source either with 2 LEDs, or appropriate circuitry. Limit the LED current to 5 mA and you will be fine.</p><p></p><p>Also realize that not all boards deliver a full 48V for phantom, so the brightness of the light may vary. If this is a problem, you can use an external power supply, or batteries inside the switch, which would last a decade or so. You then need a circuit that detects phantom voltage to turn on the light. That's a little more work, but then doesn't draw current from the phantom supply.</p></blockquote><p></p>
[QUOTE="Brian jojade, post: 35433, member: 211"] Re: Talk back kill switch question. Getting a light to work should be extremely simple. All you need is an LED on the mic side of the switch that will operate off of phantom power. If the mic gets switched off, the light should be off too. It's best to pull power from both legs of the phantom source either with 2 LEDs, or appropriate circuitry. Limit the LED current to 5 mA and you will be fine. Also realize that not all boards deliver a full 48V for phantom, so the brightness of the light may vary. If this is a problem, you can use an external power supply, or batteries inside the switch, which would last a decade or so. You then need a circuit that detects phantom voltage to turn on the light. That's a little more work, but then doesn't draw current from the phantom supply. [/QUOTE]
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