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    Infrared signal transmitter and receiver circuits Music

     

    The music signal infrared transmitter and receiver circuits. The transmitter and receiver distance of about 10 meters, as shown above, the next Figure N below.

    The figure is the infra-red music generator circuit, the circuit IC1 (UM66) is a common musical IC (ie musical), it can output continuous music signal. Output of IC1 through resistors R2 and R3 added to the transistor T1, T2 consisting of driver circuits. To drive the infrared emitting diode LED2 and LED3, to transmit the infrared (IR) beam. Drive on the T2 base LED LED1 (red) is an indicator on the chart once with power supply circuit, LED1 will be music with the IC1 signal flashes to indicate the circuit to work properly. The following diagram is infrared (IR) receiver circuit, the circuit consists of optical transistor T3 (L14F1), op-amp IC2 (741), audio power amplifier IC3 (LM386), 8Ω speaker as well as related RC components and other components. The circuit, the optical transistor T3 will launch tube on the infrared map LED2, LED3 to send the IR signal (non-electricity), after receiving into electricity, the capacitor C3 and resistor R7 is coupled to the inverting terminal of IC2 (2) feet. Amplified by IC2. IC2 (741) is a standard linear amplifier (inverting amplifier). Potentiometer for gain adjustment VRl. IC2 will be amplified optical signals of T3.

    Through the coupling of capacitor C5 and VR2 added IC3 (LM386) audio power amplifier. Push by the output of IC3 speaker LS1 sound, volume adjustable by the potentiometer VR2.

    The figure, below the circuit parameters as long as the assembly shown in the diagram. Once installed correctly. Without debugging to work properly.

    Here's infrared (IR) transmitter and receiver circuits. It is suitable for vocational school students made​​. The study of light - electricity conversion (non-electricity to power conversion). IC1 in the figure above can be any kind of musical substitution.

     

     

     

     

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