[sdiy] DIY Drums

Linium intent at club-internet.fr
Sat Jun 1 21:10:15 CEST 2002


Hello,

Now that my MCU ATS904434 can send bytes to my computer thru RS232 i want to 
build a DIY Drums trigger box with some piezo sensors. My aim is to have the 
computer play some drums samples.

I am confident about writing the code for the multiplex builtin ADC but i 
don't know yet how to build the electronic part between the piezo and the MCU.
I bet it should'n be that hard :)

Does someone know how to deals with this kind of sensor ?
I don't know how to limit the voltage since i read in the archive that the 
output voltage can be very high when you hit hard the pad (which contains the 
piezo thing), so any help welcome about this.
Next, do you thing that once the wave is half-rectified with a diode i need 
to buffer it with a caps so that the MCU can read it, or should i write some 
asm code instead to keep the highest sampled value in a window time and send 
it to the computer ?

Well as you see i am still roaming in the no man's land of possibilities...

Thx for ur attention ! 

Linium 




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