LED STEREO SOUND LEVEL INDICATOR

LED STEREO SOUND LEVEL INDICATOR for audio amplifier




LED STEREO SOUND LEVEL INDICATOR FOR AUDIO AMPLIFIER

Many circuits can be designed as level indicators by using a comparator IC or transistors but these are costly and complex and also time consuming. This circuit removes all the complexity by using a single TA7666p IC. LEDs are used as a power indicator. Different colour LEDs can be used for both the channels. One can also use an LED bargraph display. INPUT signals should be given from preamplifiers. Otherwise, LEDs will not glow at low volumes.

LED STEREO sound LEVEL INDICATOR circuit for audio amplifier circuit diagram

PARTS LIST
R1-R10 1kΩ
R11 15kΩ
R12 15kΩ
C1 0.1µF
C2 0.1µF
C3 1µF 16V
C4 1µF 16V
D1-D10 10 LEDs
IC1 TA7666P

If you have mono systems, signals should be given into both the channels. The input is given through two 4.7 µF capacitors and two 18k resistors to pins 1 and 16 respectively.

TA7666P stereo sound level indicator ic

  • Suitable for stereo LED driver
  • Wide Supply Voltage Range : VCC = 6V to 12V
  • Low Quiscent Current : ICCQ = 4ma (typ.) at Vcc = 9V
  • Variable Voltage Gain Because of Inverting Amplifier
  • Easy Arrangement for Dual 10 LED’s Driver by Series Connection of TA77666P and TA7667P




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