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Audio Decibel Level Meter – Electronic Circuit Diagram

    https://freecircuitdiagram.com/1817-audio-decibel-level-meter/
    Audio Decibel Level Meter. March 31, 2010 Rend. This is a circuit of Audio Decibel Level Meter. This circuit uses the SA604 which not only designed as an RF device but also the Received Signal Strength Indicator (RSSI). In a cellular radio, the radio’s microcomputer uses that function to monitor the received signal strength continuously. ...

Decibel Meter Electronic Circuits

    http://www.discovercircuits.com/D/decibel.htm
    Audio VU meter 9 LEDs - 5 LED VU Meter kit is based on LB1409 IC from SANYO, which will indicates the volume level of the audio signal it senses __ Contact: IQ Technologies. Decibel Meter - The circuit below responds to sound pressure levels from about 60 to 70 dB. The sound is picked up by an 8 ohm speaker, amplified by a transistor stage and one LM324 op …

Sound Level Meter Circuit - ElectroSchematics.com

    https://www.electroschematics.com/sound-level-meter-circuit/
    This sound level meter circuit can be used to control the intensity of a sound recording or in a disco. It has 5 measurement domains between 70 and 120 dB; reading accuracy is 0.5 dB. Microphone M1 is used to receive the acoustic signal and is coupled to C1, C2, R1 and R2. This components, together with the microphone’s capacity and with the ...

A versatile Decibel Meter Circuit - Engineering Projects

    https://bestengineeringprojects.com/a-versatile-decibel-meter-audio-level-indicator-spectrum-analyser/
    A decibel meter is an instrument to measure levels of the input signal(s) in decibel units. The main areas of application of decibel meter are audio level indicators, record level indicators, spectrum analyzers, and the like. The project “A versatile decibel meter circuit” shows here provides a resolution of 20 steps.

AN1991 Audio decibel level detector with meter driver

    https://www.nxp.com/docs/en/application-note/AN1991.pdf
    Audio decibel level detector with meter driver Figure 2 shows that the circuit is within 1.5 dB tolerance over the 80 dB range for audio frequencies from 100 Hz to 10 kHz. Higher audio levels can be measured by placing an attenuator ahead of the input capacitor. The input impedance is high (about 50 k ), so

Audio level meter circuit diagrams

    http://circuit-diagrams.net/categories/audio-level-meter
    Audio VU Meter. This circuit uses two quad op-amps to form an eight LED audio level meter. The op-amp used in this particular circuit is the LM324. It is a popular IC and should be available from many parts stores.

Audio Sound Level Meter-LED Sound Level Meter using …

    https://www.circuitstoday.com/sound-level-meter
    Description. This is a one-chip sound level meter that can be used for displaying the sound level of an amplifier or simply the sound level from a microphone. The heart of the circuit is IC LM 3915 Audio level IC. Even though it is a stand-alone IC, a peak detector based on Transistor BC 558 and diode 1N4001 is also included for better performance.

Audio level meter circuit - VU Level Meter

    https://www.circuitstoday.com/audio-level-meter-circuit
    Audio Level Meter Description. A simple and low cost audio level meter circuit that can be used to measure the audio level of your sound source.This circuit is a valuable tool for those who are interested in audio circuits. The circuit is designed with a flat frequency response in the range of 20Hz to 50Khz.

Sound level meter circuit using IC LM3914 - Gadgetronicx

    https://www.gadgetronicx.com/sound-level-meter-ic-lm3914/
    Working of Sound level meter: This circuit uses a electret microphone which is powered using a pull up resistor R3 . When there is a sound in the environment Electret microphone picks it up and this signal will go to pin SIG IN pin through Capacitor C2. This Capacitor C2 removes DC components in the signal. Now the IC LM3914 takes over.

LED Sound Level Indicator Circuit - Making Easy Circuits

    https://makingcircuits.com/blog/led-sound-level-indicator-circuit/
    The sound level indicator circuit can be constructed on a perfboard or if you’re handy, it can be done on a PCB. If you opt for a perfboard, use sockets for the ICs. Assemble the circuit in a small plastic case with MIC1 attached in one end and the LEDs and the range switch placed on the top if you look into using the sound meter frequently.

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