microphone attach to microcontroller
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Posts: 46,084
Please help! i'm overdue with project and i can't get
my mic to connect properly. ok so here is what i
have. PLEASE tell me if i have anything wrong. I
want to hook up a sound sensor to a A/D converter. i
have a 2 pin panasonic elec condenser microphone (~5v
rated, 60dB sig-noise ratio, +/- ~40dB sensitivity).
This plugs into a Jameco
preamp(http://www.jameco.com/cgi-bin/ncommerce3/ExecMacro/jameco/searchResult.d2\
w/report?sort=BKW&search=preamp)
which has "Output impedance: 1 kilo ohm
Max. input signal: 40mV
Frequency range: 20Hz-20kHz +/-3dB". from here, i'm
guessing the signal will be boosted but i have no clue
in what range. anyways, then i hook it up to the A/D
with this
circuit(http://groups.yahoo.com/group/basicx/message/3815)
to convert the AC wave into a linear DC signal. I'm
using a 10bit A/D built into a BasicX controller. I
have no clue what i'm doing, so anyone, PLEASE GIVE ME
ADVICE as to whether this will work, or if you have suggestions!
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my mic to connect properly. ok so here is what i
have. PLEASE tell me if i have anything wrong. I
want to hook up a sound sensor to a A/D converter. i
have a 2 pin panasonic elec condenser microphone (~5v
rated, 60dB sig-noise ratio, +/- ~40dB sensitivity).
This plugs into a Jameco
preamp(http://www.jameco.com/cgi-bin/ncommerce3/ExecMacro/jameco/searchResult.d2\
w/report?sort=BKW&search=preamp)
which has "Output impedance: 1 kilo ohm
Max. input signal: 40mV
Frequency range: 20Hz-20kHz +/-3dB". from here, i'm
guessing the signal will be boosted but i have no clue
in what range. anyways, then i hook it up to the A/D
with this
circuit(http://groups.yahoo.com/group/basicx/message/3815)
to convert the AC wave into a linear DC signal. I'm
using a 10bit A/D built into a BasicX controller. I
have no clue what i'm doing, so anyone, PLEASE GIVE ME
ADVICE as to whether this will work, or if you have suggestions!
__________________________________
Do you Yahoo!?
Yahoo! SiteBuilder - Free, easy-to-use web site design software
http://sitebuilder.yahoo.com
Comments
If trying to detect a certain level then I would buffer the output
with an opamp. Then determine which level you need to detect and set
up a compairator to output a high level when the level is reached. I
doubt the A/D in a Basicx is fast enough to catch even the slowest
spikes.
Jason
--- In basicstamps@yahoogroups.com, Jack Wu <wulabshoo@y...> wrote:
> Please help! i'm overdue with project and i can't get
> my mic to connect properly. ok so here is what i
> have. PLEASE tell me if i have anything wrong. I
> want to hook up a sound sensor to a A/D converter. i
> have a 2 pin panasonic elec condenser microphone (~5v
> rated, 60dB sig-noise ratio, +/- ~40dB sensitivity).
> This plugs into a Jameco
> preamp(http://www.jameco.com/cgi-
bin/ncommerce3/ExecMacro/jameco/searchResult.d2w/report?
sort=BKW&search=preamp)
> which has "Output impedance: 1 kilo ohm
> Max. input signal: 40mV
> Frequency range: 20Hz-20kHz +/-3dB". from here, i'm
> guessing the signal will be boosted but i have no clue
> in what range. anyways, then i hook it up to the A/D
> with this
> circuit(http://groups.yahoo.com/group/basicx/message/3815)
> to convert the AC wave into a linear DC signal. I'm
> using a 10bit A/D built into a BasicX controller. I
> have no clue what i'm doing, so anyone, PLEASE GIVE ME
> ADVICE as to whether this will work, or if you have suggestions!
>
> __________________________________
> Do you Yahoo!?
> Yahoo! SiteBuilder - Free, easy-to-use web site design software
> http://sitebuilder.yahoo.com