I love electronic sounds. My bin of SID chips and my
waiting-to-be-built MFOS sound lab ultimate boards all attest to
But what can you do in a relatively small amount of space with a
Gadgeteer and a Piezo speaker? Maybe it's not even sound
generation, maybe you can use the piezo for something else? You can use
them as speakers as well as microphones and sensors. In fact, I
believe many inexpensive electronic drum triggers are actually just a piezo with a drum head.
Have some ideas kicking around? Good! Submit the idea to GHI's
Piezo Module Design Contest by December
1, and if your idea is one of the ones selected, build out
the prototype module by January 15th. Here's the information from
Piezos are great for making sounds at a low cost. For piezos to
work, they need some sort of waveform. Although the processor on a
Gadgeteer mainboard is capable of generating waveforms, this will
waste some processor utilization for something that can be handled
better in hardware. Take the 555 timer for example, great for
generating alarm sounds. You may also use a simple microcontroller
to generate noises. The Propeller chip is a good example, it can
synthesize retro-style arcade sounds.
GHI is interested in offering a sound module for the community.
This contest aims to help create the best, simplest, design for a
Gadgeteer Piezo Module. An end user should be able to "configure"
the sound through one of the standard Gadgeteer sockets. For
example, it can use socket type X and then 3 I/Os can be used to
control the alarm sound frequency or alarm type. Or use socket type
U to send the alarm configuration over UART (serial port). We
understand that manufacturing prototype circuit boards can be
costly, submitting designs on DuinoProto
board is acceptable. DuinoProto is provided free by GHI for
First price is a new FEZ Hydra Gadgeteer mainboard, plus a $250
coupon to buy lots of stuff to hook up to it. That's pretty