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Audio generator device thingy

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soldar:
I couldn't think of a more descriptive title. I bought on eBay some of these devices, for lack of a better word, with the intention of using them maybe for something like have a loudspeaker make the sound of a barking dog when triggered by some alarm , PIR or whatever.

I have no information other than what is shown in the attached image. I cannot seem to get anything out. Before I spend more effort I'd like to ask if anyone has information, experience, ideas, advice, or whatever.

jwet:
You're missing a resistor/your diagram is wrong.  The resistor value is not critical, kind of a pullup.  10k to 400k works.

soldar:

--- Quote from: jwet on March 02, 2024, 03:52:33 pm --- You're missing a resistor/your diagram is wrong.  The resistor value is not critical, kind of a pullup.  10k to 400k works.
--- End quote ---
Ah, thanks. I'll give it a try. Do you have experience with these? What kind of output level can I expect? I am thinking I will need an amplifier after this. Right?

Benta:
Is it one of those things from a musical greeting card?
They normally use a piezo speaker with significantly higher impedance than 8 ohmx.

soldar:

--- Quote from: Benta on March 02, 2024, 07:18:13 pm ---Is it one of those things from a musical greeting card?
They normally use a piezo speaker with significantly higher impedance than 8 ohmx.
--- End quote ---
That's what I am thinking. I will probably need an amplifier with high impedance input.  I guess I will probably have to figure it out myself.

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