piclist 1999\02\03\043809a >
Thread: chime tone chip?
face BY : Mark Willis email (remove spam text)

Two ways to drive a Piezo or a speaker from a PIC, folks;

 1 pin - single ended (Other side of the speaker to Vcc or to Ground.)
 2 pin - differential (pull pin1 low, pin2 high, or vice versa, gives
you twice the voltage swing - +- Vcc as opposed to half that.)

 The latter does take 2 pins (You can figure out a transistor or gate
buffer if IO pins are scarce, though <G>)


<36B817F0.F8E312F6@nwlink.com> 7bit

See also: www.piclist.com/techref/index.htm?key=chime+tone+chip
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