_hu_
Newbie level 6
Hi
help needed,
I need a simple circuit to drive a piezo buzzer (the buzzer in not autoOX) with a pic. I build a pic based Vibration sensor that is Supplied by 3V litio cell, I need to produce a loud (long distance udible beep-beep) the pic produce a variable bf signal 800 Hz to 3000Hz, I just try to use a steep-up MC34063A with poor result ad large pcb (2 square cm of pcb only for the inductor).
thx in advance
_hu_
help needed,
I need a simple circuit to drive a piezo buzzer (the buzzer in not autoOX) with a pic. I build a pic based Vibration sensor that is Supplied by 3V litio cell, I need to produce a loud (long distance udible beep-beep) the pic produce a variable bf signal 800 Hz to 3000Hz, I just try to use a steep-up MC34063A with poor result ad large pcb (2 square cm of pcb only for the inductor).
thx in advance
_hu_