Hello!
I'm just a beginner, and as a beginner I'm starting from easiest projects.
I want to make some music on a buzzer, but I need "notes".
Where do I get them for this specific kind of music I want to play?
See File > Examples > 02.Digital > toneMelody and the associated tutorial page:
https://www.arduino.cc/en/Tutorial/toneMelody
You can play notes on a piezo (flat disc), but not on buzzer (taller cylinder with + and/or - on it).
So what do you have.
Leo..
Yeah, I mean that piezo, sorry.
But I know, I read that tutorial. I want to get notes for specific music I want to make on it (Beep Beep I'm a Sheep - like rhythm of it), but can't find anything. Should I acquire MIDI file first?
All explained in the link from post#1.
Leo..
Wawa:
but not on buzzer (taller cylinder with + and/or - on it).
Actually you can, you just need a passive one. They have ones that look just like the "active" piezo buzzers but don't have any circuitry to generate a set frequency. Here's an example of a passive one you can use with tone():
http://www.ebay.com/itm/391752149671
I ended up with some of each that looked the same at first glance when I started with Arduino and it caused me quite some confusion until I noticed one had a circuit board.
16ohn??
I suppose they mean 16ohm.
Not very wise to connect that to an Arduino pin.
Leo..
It also says "Active Passive" in the description and actually now that I look it doesn't say "piezo" anywhere on that listing, though there are others that do. That might be the style with a coil instead of a piezo. I didn't look close at the listing, just grabbed the first result I saw. That wasn't the best example. It's really anyone's guess what you're going to get with these Chinese eBay listings and good luck getting a straight answer out of the seller. It's not a big loss if you end up paying $0.73 USD for the wrong item and it doesn't hurt to stock up the parts stash but it can really delay a project.
16 Ohms is not a Piezo, it's a regular (electromagnetic) speaker. The minimum resistance on an Arduino pin is 125 Ohms (Ohm's Law, 5V / 40mA max). If you want to use a speaker, put a resistor in series.
A Piezo device is electrically like a capacitor. With DC it has infinite resistance and it will measure open (infinite resistance or no-connection) on an Ohmmeter. The higher the frequency, the lower the impedance. (DC is zero-Hz).