Drumly

Synthesize drum beat upon trigger from piezo sensor.

Parts Used

1. 8 Ohm 1W speaker
2. Audio amplifier http://www.ti.com/lit/ds/symlink/lm386.pdf
3. https://os.mbed.com/platforms/FRDM-KL43Z/
4. Electrolytic capacitors of values {0.1uF, 100uF, 220uF}
5. Resistors {5kohm, 1Mohm}
6. Piezoelectric sensor (35mm diameter)
7. Jumper canbles/wires
8. Breadboard (medium size would do)
9. 9v DC voltage source

Circuit Diagram

TODO

• Attach additinal sensors for variety
• Synthesize drum beat for snare using few harmonics
• Periodically interrupt for ADC readings - PIT

Acknowledgement

http://www.daycounter.com/Calculators/Sine-Generator-Calculator.phtml