How to build Music Generator Schematic Using UM66

Description

UM66 is a pleasing music generator IC which works on a supply voltage of 3V. the required 3V supply is given through a zener regulator. its out put is taken from the pin no1 and is given to a push pull amplifier to drive the low impedance loud speaker. A class A amplifier before push pull amplifier can be used to decrees the noise and improve out put. UM66 is a 3 pin IC package just looks like a BC 547 transistor.

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

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