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Splitting an audio signal on a PCB - Doides required? Answered

I have a 3.5mm audio jack on a PCB.  I want to split the signal to go to two different places on a PCB.  Do I need a diode on each "branch" or literally just split them in a T with no components in between?

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steveastrouk (author)2011-07-24

You'd not use diodes. What are you putting the signals to ?

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Joe426 (author)steveastrouk2011-07-24

The signal is split to a VU meter and a Color Organ.

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steveastrouk (author)Joe4262011-07-25

If the input resistance of the meter and organ aren't pretty high, then buffer the signal - use a "unity-gain buffer" made with an op amp to do it.

Steve

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Quercus austrina (author)2011-07-24

Split it ("T") and probably use a buffer or amplifier per branch in order to correctly driver each individual object. Color organ will need more drive than a VU meter. You might even need to attenuate the signal for the VU meter depending on it's sensitivity. No diodes needed.

Qa

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