MP3 Player with FM Radio

This circuit is used for playing MP3 files from a memory chip, card reader or from a pen drive. Same circuit is also used for receiving telecast of FM band Radio with digital Display of frequency. You will need MP3 Kit. Kit include MP3 Card with Digital Display, USB port, Remote Control and connecting cables […]
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Four Tone Siren

Circuit Diagram of Four Tone Siren UM3561 Project Picture UM3561 IC includes ¬†oscillator and selector circuits so few external component is used for construction of four tone siren. The UM3561 contains programmed mask ROM to simulate siren sound. Power consumption of IC is low.It is powered by 3 Volt. One NPN Transistor is used for […]
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