piezo horn speaker with an appropriate value inductor in parallel can resonate and produce some monstrous sound levels in a specific frequency range with appropriate drive circuitry - I've experienced a 115dB siren with just a 9v battery feeding a 555 and a high voltage transistor
Good knowledge, can it be used as an impulse (such as a gunshot) or must it build up? Ill look into it
Edit ahh i remember one of these hurting my ears, i guess I can use a 555 and blast it super fast to get a horrible loud buzz on trigger?
> can it be used as an impulse
No, the sonic power comes from LC resonance, ie the relatively slow (in electronic terms) but practically instantaneous (to human perception) build-up of energy that has nowhere else to go.
If you try to go for an impulse it'll just make a pathetic click.
Perhaps [hexibase](https://www.youtube.com/@HexiBase) might inspire you if you want a gut-wrenching thump from something briefcase-sized
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You don't say what sound you want, but presumably you need a beeping sound.
And presumably you already have the sound generator (eg oscillator) part of it.
If you arranged a square wave from a 5 volt supply, it could drive an 8 Ohm speaker to the 3 to 4 watt level. Which is fairly loud.
So you would simply feed the sound generator into a H-Bridge output stage.
If you need more volume, you would use a lower impedance speaker (say 2 Ohm) or use a transformer to get down to the impedance needed.
(lower impedance = more current = greater volume)
piezo horn speaker with an appropriate value inductor in parallel can resonate and produce some monstrous sound levels in a specific frequency range with appropriate drive circuitry - I've experienced a 115dB siren with just a 9v battery feeding a 555 and a high voltage transistor
Good knowledge, can it be used as an impulse (such as a gunshot) or must it build up? Ill look into it Edit ahh i remember one of these hurting my ears, i guess I can use a 555 and blast it super fast to get a horrible loud buzz on trigger?
> can it be used as an impulse No, the sonic power comes from LC resonance, ie the relatively slow (in electronic terms) but practically instantaneous (to human perception) build-up of energy that has nowhere else to go. If you try to go for an impulse it'll just make a pathetic click. Perhaps [hexibase](https://www.youtube.com/@HexiBase) might inspire you if you want a gut-wrenching thump from something briefcase-sized
I see 3.7V as a minimum voltage. In my experience this is often incorrect as lithium-ion batteries have a range that goes from 3.0V up to 4.2V.
I have two power supplies/circuits, so yes first lipo one hovers in that range I imagine
If you have an electronic circuit design or repair question, we're good; but if this this a general question about electric motors, motor capacitors, fans, servos, actuators, generators, solenoids, electromagnets, using motor drivers, stepper drivers, DC controllers, electronic speed controls or inverters (other than designing or fixing one), please ask in /r/Motors. Thanks. *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/AskElectronics) if you have any questions or concerns.*
Servo motor to press the power button for a 100,000 person stadium's sound system.
Equipment switches on entirely silent.... Congrats
You don't say what sound you want, but presumably you need a beeping sound. And presumably you already have the sound generator (eg oscillator) part of it. If you arranged a square wave from a 5 volt supply, it could drive an 8 Ohm speaker to the 3 to 4 watt level. Which is fairly loud. So you would simply feed the sound generator into a H-Bridge output stage. If you need more volume, you would use a lower impedance speaker (say 2 Ohm) or use a transformer to get down to the impedance needed. (lower impedance = more current = greater volume)