Piezo Sensor Element 27mm Potentiometer These couplers are made of

These couplers are made of machined aluminum and have a spiral cut that makes them slightly flexible so they can be fit to two shafts even if they are not perfectly co-linear and will help reduce bending effects

Logic Type: AND

L7815CV  negative  Regulator  15V 1A TO-220

Character size:         2

Infrared is emitted at a certain frequency

Piezo Sensor Element 27mm Potentiometer These couplers are made ofPiezo element is a sensor which is used to detect vibration, in this case, a knock on a door, table, or other solid surface. A piezo is an electronic device (sensor) that generates a voltage when it's physically deformed by a vibration, sound wave, or mechanical strain. Similarly, when you put a voltage across a piezo, it vibrates and creates a tone. Piezos can be used both to play tones and to detect tones. For more information on piezo electric