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DIY Sound Control Module Kit LED Melody Light Funny DIY Electronic Experiment Kit

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$1.79 $1.34
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Price$1.49
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Description:
When music or other sounds are heard, the LED lights will flicker with the rhythm of the sound(sound speed). After the success soldering, you can feel the beautiful melody combination of sound and light.
 
Working Voltage:
3-4.5V. If need a higher working voltage, you can add current limiting resistance to the LED, usually dozens to 100 ohms.
 
Circuit Principle:
1>. The sound control LED light circuit consists of power circuit, microphone amplifier circuit and LED light indicator circuit.
2>. The power supply is input from JP, and C1 filter power supply path is used. MIC converts the sound signal into an electrical signal.  
3>. Then it is coupled through C2 to Q2, and amplified. 
4>. Next the amplified signal is sent to Q1 base. Q1 will promote the LED to flicker. The louder the sound, the higher the LED brightness.
 
Soldering Attention:
1>. The electret microphone has a positive and negative electrode. Its end that is connected with  the aluminum shell is the negative electrode.
2>. When assembling , use a shearing resistance foot to solder to the two electrodes of the microphone and then assemble it on the circuit board.
3>. The power supply is positive and negative, and the power supply is usually connected with the dupont line. It can also be connected directly from the battery box of 3-4.5 V.
 
Circuit Diagram:
 

 

Component Listing:
 
NO. Component Name PCB Marker Parameter QTY
1 Metal Film Resistor R1 4.7K 1
2 Metal Film Resistor R2 1M 1
3 Metal Film Resistor R3 10K 1
4 Electrolytic Capacitor C1 47uF 1
5 Electrolytic Capacitor C2 1uF 1
6 S9012 Q1,Q2 TO-92 2
7 MIC MIC   1
8 LED L1-L7 3mm 7
9 Male Pin   2.54mm 2P 1
10 PCB   29*30mm 1


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Quantity10+
Price$1.49
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DIY Sound Control Module Kit LED Melody Light Funny DIY Electronic Experiment Kit
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