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Build Your Own Music: UM66 Circuit Diagram (8 Ohm)
Description
The UM66 is a charming music generation integrated circuit operating at a supply voltage of 3V. The necessary 3V power source is provided via a zener regulator. Its output is taken from pin no1 and fed into a push-pull amplifier for driving a low-impedance loudspeaker. A Class A amplifier preceding the push-pull amplifier can be utilized to reduce noise and enhance output performance. The UM66 is a 3-pin IC package resembling a BC 547 transistor in appearance.
Integrated Circuit Details: UM66
The UM66 is a specialized integrated circuit designed for generating musical tones. This device integrates a 62-note ROM memory, allowing for the playback of a wide range of melodies and tunes. Furthermore, it features a power-on reset function, ensuring proper initialization upon power-up. This IC’s primary function is to produce audio signals, making it suitable for applications such as small synthesizers or electronic musical instruments. It’s a compact solution for generating sound, simplifying circuit design for audio projects.
Circuit diagram:
Parts:
- R1 = 4.7K
- C1 = 10uF-25v
- D1 = 3.3v Zener
- Q1 = SK100
- Q2 = SL100
- IC = UM66
- SP = 8 ohm
Pin out of UM66 IC:
- Output----Melody Output
- +Vdd-----Positive power supply
- -Vss------Negative Power supply
Features of UM66T series:
- 62 Note ROM Memory
- Voltage rating: 1.3V to 3.3 V
- Power on reset