ka2284 based audio level indicator circuit(will use battery level indicator)

Introduction:
                                The KA2284 is a monolithic integrated circuit designed for 5-dot LED level meter drivers with a built-in rectifying amplifier. It is suitable for AC/DC level meters such as VU meters or signal meters.

Features:

• High gain rectifying amplifier included(Gv=26dB) 
• Low radiation noise when LED turns on 
• logarithmic indicator for 5-dot LED of bar type. 
• Constant current output( 15mA)
• Wide operating supply voltage(3.5V~16V) 
• Not necessary diode or transistor for ALC 
• Minimum number of external parts required

IC Package:

Block Diagrams:

Circuit Diagrams:

• if the LED1 is ON (IC Pin 1) - the battery charge is 100% full
• else if LED2 is ON (IC Pin 2)- the battery charge is 75% full
• else if LED3 isON (IC Pin 3)- the battery charge is 50% full
• else if LED4 is ON (IC Pin 4)- the battery charge is 25% full
• else LED5 is ON (IC Pin 6)- the battery charge start from 0%

Note: will use 12V battery and calibrate using this potentiometer...next will use 9v battery and again calibrate using this potentiometer. 

Application:

• Audio level Indicator
• Battery level indicator