1. Brass piezoelectric disk sensor. http://contactmicrophones.com/index.html. Brass piezoelectric disk sensor. http://contactmicrophones.com/index.html.
2. Cmos rail-to-rail op amp. http://www.ti.com/product/TLV2772. Cmos rail-to-rail op amp. http://www.ti.com/product/TLV2772.
3. luxeon rebel. http://www.lumileds.com/uploads/20/DS63-pdf. luxeon rebel. http://www.lumileds.com/uploads/20/DS63-pdf.
4. Luxeon rebel and luxeon rebel es colors. http://www.lumileds.com/products/color-leds/luxeon-rebel-color. Luxeon rebel and luxeon rebel es colors. http://www.lumileds.com/products/color-leds/luxeon-rebel-color.
5. luxeon z color line. http://www.lumileds.com/uploads/415/DS105-pdf. luxeon z color line. http://www.lumileds.com/uploads/415/DS105-pdf.