What kind of circuit does a buzzer need?
A buzzer usually has an oscillating transistor circuit inside – to make the buzzing noise when voltage is applied, so it makes a tone. Applying voltage to a speaker will not make a tone, so you’d need an external oscillating circuit (e.g. a 555, or transistor oscillator).
What’s the difference between a speaker and a buzzer?
A speaker was/is a device used to reproduce sound from an electric waveform with the sound coming out being at least a passable analogue of the signal going in. However in more recent years the world has moved on. The relative cost of electronics in general and micro controllers in particular has dropped compared to the cost of electromechanics.
What was the original purpose of a buzzer?
Traditionally a buzzer was a device designed to make noise. Traditionally it would have been an electromechanical device. It would typically be supplied with DC and the oscillations would have been produced by an electromechanical process inside the buzzer.
Which is louder a piezo speaker or a buzzer?
To elaborate on “piezo sounders”… These have a piezo speaker inside them, but the piezo element is inside a highly-tuned Helmholtz resonator. Although they can produce different frequencies (by driving them with different waveforms), the resonator means that this one frequency produces very much louder sound than anything else.
A buzzer usually has an oscillating transistor circuit inside – to make the buzzing noise when voltage is applied, so it makes a tone. Applying voltage to a speaker will not make a tone, so you’d need an external oscillating circuit (e.g. a 555, or transistor oscillator).
A speaker was/is a device used to reproduce sound from an electric waveform with the sound coming out being at least a passable analogue of the signal going in. However in more recent years the world has moved on. The relative cost of electronics in general and micro controllers in particular has dropped compared to the cost of electromechanics.
Traditionally a buzzer was a device designed to make noise. Traditionally it would have been an electromechanical device. It would typically be supplied with DC and the oscillations would have been produced by an electromechanical process inside the buzzer.
To elaborate on “piezo sounders”… These have a piezo speaker inside them, but the piezo element is inside a highly-tuned Helmholtz resonator. Although they can produce different frequencies (by driving them with different waveforms), the resonator means that this one frequency produces very much louder sound than anything else.