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jf_moreira

LoMA

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Hello. Anyone built the LoMA buzzer?

I just have one doubt :unsure: : the 5v/6v piezo is it the kind that, when u apply 6v it starts beeping already (no circuit needed to make noise) or it´s just the piezo (being the PIC circuit responsible for generating the pulses for the piezo)?

Thanks,

Jeffo.

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It has the oscillator drive circuit built into it. All that is needed is a DC voltage to cause the alarm to sound. The specified part is technically called a "Magnetic Buzzer." I think DigiKey offers full details to the part on their web site.

BTW, many have been built. It is an simple PIC project that works well.

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It has the oscillator drive circuit built into it. All that is needed is a DC voltage to cause the alarm to sound. The specified part is technically called a "Magnetic Buzzer." I think DigiKey offers full details to the part on their web site.

BTW, many have been built. It is an simple PIC project that works well.

Oh, ok. Doubt solved... :D

It happened that I have some simple (no oscillator built into) piezos at home and think I could try some....not in this case though. ;)

I have used intermittent (beep-beep-beep) loud and larger 12V buzzers on simple circuits, but liked the fact that your project won´t need a PCB board. (sometimes I get very lazy on doing the PCB).

Thanks for the project and reply.

Jeffo.

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You can build it with the standard piezo, but you will get a series of clicks, timed to the pin high, pin low sequence. At least you can test your circuit until your other buzzers come in. :P

BTW, I've built several, but used the 12F509 in place of the 12C509.

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