trying to get more volume from piezo

[wildbill]

help ! new to picaxe, i have connected a piezo sounder from output pin, but the volume is very low. how can i increase it ? i'm looking to get the volume of an exit/entry delay on an alarm board, you know, beep beep beep........
any help would be appreciated. thank you in advance.

 

[ylp88]

If the piezo's specifications allow it, run it from a higher supply voltage. Use the PICAXE to switch on a transistor and run the piezo from the transistor.

eg.<code><pre><font size=2>

-------------------------------+----&gt; +12V
+--&gt; +5V |
| Piezo
+-+------+ |
| PICAXE | |
|08/18/28| |
| | B | C
| Output+---------------|&lt;
| | | E
+---+----+ |
| |
+---------------------+---&gt; 0V
</font></pre></code>
<b><i>ylp88 </b> </i>

 

[Michael 2727]

Are you using an 08M chip ?
What command are you using tune ot sound ?
( Tune only used by 08-M )

&quot;Tune&quot; seems to give a louder sound than
&quot;Sound&quot;, probably due to being closer to
the resonant of the Piezo sounder.

 

[wildbill]

Thanks to ylp88 and michael 2727, picaxe 18 project board:
i tried your suggestion with a 7vdc regulated supply, the first i could get my hands on, it already is a good bit louder, so with a 12 vdc supply it should be more than enough. ( i may even have to put a res in line if it's too loud !!!)