[sdiy] NEWBIE REQUEST; PIEZOS

[Edu Silva]

Toby Paddock wrote:
> 
> I used 1/4" mono jacks and plugged them into my radio shack mixer
> mic inputs set to -20dB. They are very sensitive. Insanely sensitive.
> I'm hoping that I don't blow the mixer input.


Many mixing consoles (not sure about your mixer, better check it out)
have overload protection. These are diodes tied to power supply rails
(usually +15 and -15V).


> I will probably add back to back diodes across it to limit the voltage
> to 0.7V for protection.


This will limit the headroom. The high frequency harmonics created by
the heavily distorted waveform will pass trough and $%*#@! the audio
signal... 

You need a fast (called "brickwall") limiter, with a FET.

-- 
 
    Edu Silva / ES2 Audio -   Salvador / BA / Brazil
    bahi0387 at terra.com.br - http://audiolist.cjb.net




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