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Any Suggestions?

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Cyclone

New Member
Hi,


I am trying to build a sound sensor for my Lego RCX. If i hook the mic to the rcx inputs directly its not sensitive enough I practically have to blow as hard as i can on the mic to get the values to go up.

I am looking for some sort of circuit that would amplify these values so that I can tell my RCX to do something via sound from a reasonable distance.


any suggestions? Thanks
 

Cyclone

New Member
thanks. well i tried a few circuits and they don't seem to work properlly. does anyone have any other ideas or circuits like this only using 9 volts or less?

I have this toy robot kit that i built it has an electritet mic and its electronics are only built using transistors,capacitors and resistors! and it runs on only 2 double AA Bateries.

I am looking for a circuit like the one in the bot. thanks!
 
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