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Second generation Piezo Preamp boards on their way

Submitted by dave on

Matt put this picture of the next round of Piezo Preamp boards up on his Flickr Stream. I've removed the piezo -ve input, and tied it to ground, which might loose 3dB of gain, but makes figuring out ground planes a lot easier. I couldn't hear the difference when I shorted piezo -ve to ground, and it makes the layout much smaller and easier.

Tags: 
electronics
contact mic
diy
surface mount
piezo preamps
circuit
Project Type: 
Sound and Music
SciTech

First set of piezo preamp boards

Submitted by dave on

Got the first set of boards from Matt Venn for prototyping piezo preamps, and they're great! I've soldered both boards, after using the JFET matching described here (NOTE: link seems to be dead - I'll copy the circuit diagram from my notebook).

Tags: 
electronics
noise
audio
piezo
preamp
contact mic
diy
surface mount
jfet
prototyping
piezo preamps
Project Type: 
Sound and Music
SciTech

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