I am trying to acquire, preferably encapsulated, a miniature audio
oscillator 0.8 – 1khz, normally biased off but activated when the
control voltage is removed It must be capable of driving a miniature
speaker (via an integral amp if necessary). 9V battery is the
preferred power source but not critical. Does anyone know where such a
thing could be purchased? As I need a lot of them, I am not into
making them myself.
Thanks in advance
On 30 Sep 2003 04:41:12 -0700, email@example.com (Meoww) wrote:
How many is 'a lot' ?
How loud ?
What level of control voltage ?
The electronics to do this would be pretty simple - parts cost a quid or two,
depending on quantity
and sound level.
Feel free to email me of you want to discuss a custom-made solution
Is the frequency important? There are several small sounder units that
will make a noise ;-) when only DC is applied. Maplin KU56 at 1.69 is one,
and will operate on voltages from 3-24.
Of course it would need a box and switching circuit to make it a power off
If you don't have any success with a ready made unit, I'll give you a
quote provided it's not for thousands. ;-)
*The modem is the message *
Dave Plowman firstname.lastname@example.org London SW 12
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