Piezo voltage Peak Detector & Hold circuit.

Thread Starter


Joined Jan 3, 2010
Hello, I need your help building a circuit. I would like to build a MIDI guitar. I have an Arduino board that will be programmed to output MIDI codes to a PC sound card or a Sound Module. The input will be 6 piezos attached to 6 strings and other digital switches. The problem is to have a circuit that will detect the piezos peak voltage and hold it until it is read by an analog input and then it needs to be reset. I tried to simulate the following circuit; http://www.pjrc.com/tech/midi-drums/sch-ana1.html
on the popular java applet from the following page;
but it does not seem to work. Please help. I'm including my circuit diagram, just import it by pasting into the Circuit Simulator java application.