The first drum pad attempt used 24" diameter, 1/8 thick Masonite with four inches of foam below, and mouse pads on top. I tried a good hard hit, and cracked the board! Second try used two layers of Masonite, 18" in diameter, joined with Gorilla Glue.
A length of 26 GA stranded wire was soldered to a 1" piezo disc. You can get an idea of the polarity and a rough idea of the amplitude by using a DC voltmeter and simply squeezing the sensor. The silver part of the sensor is positive, although that doesn't really matter. The cable and the sensor were glued to the drum pad with GE silicone glue. The other end of the cable was connected to the Arduino input(0) with a 1 megaohm resistor and a 4.7 V zener diode in parallel to protect the Arduino inputs.
The first drum pad attempt used 24" diameter, 1/8 thick Masonite with four inches of foam below, and mouse pads on top. I tried a good hard hit, and cracked the board! Second try used two layers of Masonite, 18" in diameter, joined with Gorilla Glue.
A length of 26 GA stranded wire was soldered to a 1" piezo disc. You can get an idea of the polarity and a rough idea of the amplitude by using a DC voltmeter and simply squeezing the sensor. The silver part of the sensor is positive, although that doesn't really matter. The cable and the sensor were glued to the drum pad with GE silicone glue. The other end of the cable was connected to the Arduino input(0) with a 1 megaohm resistor and a 4.7 V zener diode in parallel to protect the Arduino inputs.
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