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« by airman00 on December 06, 2007, 09:45:59 PM »
...... Piezo speakers (also known as piezo buzzers or piezo ............ of only needing a single output port pin. The piezo can be connected directly between the port pin ............ be driven to the appropriate level when the piezo is idle in order to avoid applying a DC bias. ............ . This creates twice the voltage swing across the piezo, which results in higher volume. When the piezo ............ same output level in order to avoid a DC bias. Piezo speakers have strong peaks in their frequency ............ . If you are just using a piezo as a simple audible indicator, you may want to ............ and I have found that it is useful to include a piezo in almost any microcontroller based project ......