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LED VU Meter - CircuitLib - Electronic Circuits
https://www.circuitlib.com/index.php/schematics/product/69-led-vu-meter/category_pathway-28
LED VU-Meter schematic How to use and calibrate the VU meter Connect VU-meter's ground to your amplifier's ground. Then, connect C8 and C2 capacitors (VU-meter's inputs) at your Left and Right speaker terminals, respectively. Use only one wire from each speaker. Which wire is the right-one, can be found experimentally.
Simple 20 LED Vu Meter Using LM3915 : 6 Steps - …
https://www.instructables.com/Simple-20-LED-Vu-Meter-Using-LM3915/
The VU meter is a circuit for an indicator of the audio signal strength. The VU meter circuit is usually applied to an amplifier circuit so that the level of audio power can be determined by certain parameter settings which will be displayed in the form of light from the LED.
VU meter circuit Stereo 20 LED with PCB - ElecCircuit.com
https://www.eleccircuit.com/led-vu-meter-circuit/
Simple LED voltmeter circuit using LM3914 Analog VU meter schematics TDA2030 stereo amplifier circuit Build this project First of all, make the PCB layout in stereo or mono as you want. Stereo VU meter PCB layout Then see Mono form here. Mono VU meter PCB layout Secondly, Soldering all components into the PCB, as you see in (stereo form).
LED VU Meter - circuit-diagramz.com
https://circuit-diagramz.com/led-vu-meter/
The meter shown in the diagram is based on eight opamps, contained in two Type LM324 chips, which function as comparators. The inverting input of each of the opamps is provided with a reference voltage derived from potential divider R3-R10. The values of these resistors are chosen to give a 5 dB step between adjacent resistors.
LED Audio VU Meter
https://www.sound-au.com/project60.htm
Figure 1 - The LED VU Meter Circuit L1 to L7 will normally be green (normal operating range) and L8 to L10 should be red (indicating overload). This gives a 9dB overload margin when the unit is calibrated as described below. As shown, full scale sensitivity (with VR1 at maximum) is 4 Volts peak (approximately 2.8 volts RMS).
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