Starting Electronics Needs Your Help!
It is that time of the year when we need to pay for web hosting and buy new components and equipment for new tutorials. You can help by making a donation. Contribute to this website by clicking the Donate button. The total will be updated once daily. (You may need to clear your browser cache to see the updates.)
Target Amount: $2000
Amount Raised: $840
Top Donor: C.C. $100
Created on: 30 July 2012
A piezo disk can be used to sense vibration or used as a buzzer to produce an audible sound.
The schematic symbol for a piezo disk or piezoelectric sensor is shown below:
The photo below shows what physical piezo disks look like. They may come packaged in a plastic case. If you buy a piezo sensor that is package in a plastic case, make sure that it is not a buzzer that has built in electronics to make it produce a sound. If this is the case, you will not be able to use it as a sensor.