I just learned about the Arduino tone library. The only buzzer I have lying around is in a RadioShack bag and is 6v dc rated at 45ma.
Is this safe to connect to the Arduino to digital pin 3, then to ground.
Or do i need to use a transistor?
Thanks!
You need an NPN transistor to conduct that much current, with a 1K resistor from Pin 3 to the base connection.
If the buzzer beeps when connected to 6v, it has a built tone module already.
Observe polarity.
.
A mechanical BUZZER with a + and/or - stamped on it, can't be used for sound.
Use a PIEZO disc for sound.
You might be able to find one in a musical greating card.
Leo..
Oh, well, here it is...
can i just make it buzz on and buzz off?
can i just make it buzz on and buzz off?
Yes, with a transistor.
Just like, any NPN... will a 2n222 do the trick. or do I need something specific?
This is all running from a 12v li-on battery pack, straight into the dc barrel jack.
Any easy way to cut 12vdc into 6vdc?
jremington:
You need an NPN transistor to conduct that much current, with a 1K resistor from Pin 3 to the base connection.