I have part of a circuit where I'm not sure if I'm supposed to use a piezo or a regular speaker. I have uploaded part of my schematic from Eagle, and also the circuit I based it on from a URL. Should I use a piezo or a speaker? I tried a piezo today, and it only clicked.

 

In Siren 1 you connected pin 4 to pin 2 and pin 6 which is wrong.
In Siren 2 you connected pin 3 to pin 2 and pin 6 which is also wrong.

A speaker in a proper enclosure will sound like a siren. A piezo will make a high pitched little squeak.

 

Yep your circuit is wrong, the yellow circuit is correct..

 

I redrew the schematic for a 556 but it's too much hassle to upload since the attachment manager won't work with android.

 

I know the yellow circuit is correct, but should I use a piezo or like an 8ohm speaker?

 

Hello,

Piezo's will only be good for very high pitch tones.
An 8 Ohm speaker will work, but only at a low volume level.
An 32 or 150 Ohms speaker will be better for the 555.

Bertus

 

Hello,

Piezo's will only be good for very high pitch tones.
An 8 Ohm speaker will work, but only at a low volume level.
An 32 or 150 Ohms speaker will be better for the 555.

Bertus

Yes ...right

 

If you can't find a higher impedance speaker you could wire a number of small 8 or 16 ohm speakers in series.