LM2904 Sound Intensity Detection Module Analog Decibel Detection Noise Control Sensor Microphone Module

Description

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Application
Used to detect the environment: sound size, there is no sound, noise, sound intensity; But it can’t identify sound frequencies, it can’t be used to detect specific sound frequencies.
Product Features
1, using the original high sensitivity microphone and LM2904 operational amplifier, with low power consumption, the total harmonic distortion is small and other advantages.
2, high sensitivity, in a closed environment, within 10 meters of normal speech can be detected.
3. can directly output linear simulation, AD acquisition, more convenient, solve the pain of many customers direct waveform acquisition. It can also be used directly as a decibel sensor (requires program algorithm conversion).
Suggestions for use
1, try to use small ripple, stable power supply, to ensure the quality of the output signal
2. In order to obtain a larger amplitude, the module supply voltage can be increased, but cannot exceed its allowable range.
3. ADC chip acquisition operation is used. It is recommended to connect 1K-10K pull-down resistance to the ground.
Description of the interface
S– Signal (analog output)
V — VCC positive terminal
G — GND negative pole
Parameter Description
PCB size: 41mmX24mm
Power supply voltage: 5V (maximum 6V)
Signal output: 0~2.3V (analog)
Signal indicator: 1 channel power indicator and 1 channel signal indicator LED
Fixing method: 4 M3 screw positioning holes and 3 Lego bricks positioning holes
Service & Cooperation:
1, We are a professional supplier of Camera Modules, Screen Displays, Various Modules etc. Electronic Component, support BOM Electronic Componts List, Purchase list quotation, OEM Order, Drop Shipping and wholesale order.
2, We can provide product quotations, find or customize products, one-stop procurement, product related document etc. to meet your requirements. 3, If you message to us, we will reply to you in 1~10 hours.
Payment & Guarantee:
1, Honesty first, if the package you got has some problem, please contact with us at the first time.
2, We support various popular payment methods. Hope to have long-term and in-depth cooperation with you in business.
3, For Europe buyer, Order Amount > 150 EUR, need you to pay European Union VAT and Tariff when the parcel is in customs clearance.
Shipping & Choose:
1, After the order is paid, it will be sent out in 24 hours usually.
2, If you need the shipping of package can be checked and more faster, please choose“AliExpress Saver Shipping”or “AliExpress Standard Shipping” shipping way.
3, If you choose Fedex IP or DHL (Commercial Express), the customs officer will ask you to pay customs duties, and we need you assistance in clearing the package.