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This article explains the concept behind generating sound from the 8051 microcontroller (AT89C51). This concept can be used to generate sound with any MCU. It can be used to generate specific sounds or alarms. This circuit has wide applications like in cars to produce sound while reversing, in electronic piano to generate different tones, or in electronic toys to generate tones.
Sound is a function of frequency. This concept has been used to generate sound from the microcontroller. Different types of sounds can be produced by varying the frequency.
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AT89C51 is an 8-bit microcontroller and belongs to Atmel's 8051 family. ATMEL 89C51...
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