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Ditulis Oleh : YK69 Elektro
Judul : LED Indicator Daya Audio Amplifier

LED Indicator Daya Audio Amplifier

LED Indicator Daya Audio Amplifier

This circuit, connected to the loudspeaker output of an audio amplifier, will indicate the instantaneous output power delivered to the loudspeaker(s) by means of six LEDs illuminating one after another by voltage values increasing little by little, providing the visual impression of a luminous bar or column, increasing and decreasing in height following the increase and decrease of the signal’s level.

Skema Rangkaian Indicator Daya Audio Amplifier

Notes:

• The output power indicated by each LED must be doubled when 4 Ohms loads are driven.
• The circuit can be adapted to suit less powerful amplifiers by reducing the number of LEDs and related voltage dividers.

List Component :
R1: 220R 1/2W Resistor
R2,R5,R6,R8: 100R 1/4W Resistors
R10,R12,R14: 100R 1/4W Resistors
R3: 220R 1/4W Resistor
R4,R7: 330R 1/2W Resistors
R9: 560R 1/2W Resistor
R11: 820R 1/2W Resistor
R13: 1K2 1/2W Resistor

D1: 1N4004 400V 1A Diode
D2,D4,D6: BZX79C2V7 2.7V 500mW Zener Diodes
D3,D5,D7,D8,D9,D10 Red LEDs (Any dimension and shape) (See Notes)

The input signal is first rectified by D1 and then sent to six different voltage dividers, one for each LED. In this way, the indication provided by the LEDs illumination of this “Power Display”, will be related to the instantaneous power sunk by the whole loudspeaker cabinet. Six output power levels are displayed by the LEDs in a 2W - 80W range (no setup required). Each nominal power level indication into 8 Ohms load is reached when the respective LED illuminates at full brightness.

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,LED Indicator Daya Audio Amplifier xxx .

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