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* An explanation of the type of amplifier for our piezo disc is given here: [http://www.openmusiclabs.com/learning/sensors/electret-microphones/ Open Music Labs] | * An explanation of the type of amplifier for our piezo disc is given here: [http://www.openmusiclabs.com/learning/sensors/electret-microphones/ Open Music Labs] | ||
* Where to buy the teensy and audio shield (rev. D)? [https://www.exp-tech.de/plattformen/teensy/9596/teensy-4.0-development-board e.g. Exptech] | * Where to buy the teensy and audio shield (rev. D)? [https://www.exp-tech.de/plattformen/teensy/9596/teensy-4.0-development-board e.g. Exptech] | ||
Needed Material: | |||
* Teensy 4.0 | |||
* Teensy Audio Shield Rev.D | |||
* Piezo Disc (bigger is louder, i use 3.5 cm outer diameter) | |||
* flexible Cable with two wires | |||
* N-Channel JFET Type Transistor either | |||
** [https://pdf1.alldatasheet.com/datasheet-pdf/view/100890/SANYO/2SK596.html 2SK596] scrapped from electret mic or | |||
** [https://www.musikding.de/2N5457 2N5457] together with a 100kOhm Resistor | |||
===C++ Intro=== | ===C++ Intro=== |