Simple Mic audio amplifier can amplify sound that is given from Microphone. This circuit can be used as “Small mic and loudspeaker system” for a small space like a room. This circuit can also be used in many applications like portable music players, intercoms, radio amplifiers, TV sound systems, Ultrasonic drivers etc. It can also be used as sound sensor for microcontrollers. Op-Amp with Switch IC NJM2120D NJM2120 JRC 2120D 2-Pack,Electronics,Diodes, transistors, ICs,Price:$3.85,SKU:69200@ GoodLuckBuy.com-Freeshipping. Low Voltage Audio Amplifier IC JRC NJM386D LM386 5-Pack. ![]() It is inexpensive, low power operated and only need few components to work. This circuit is based on LM386 IC to amplify sound. LM386 is a low voltage audio amplifier and frequently used in battery powered music devices like radios, guitars, toys etc. Crack for messagesave. The gain range is 20 to 200, gain is internally set to 20 (without using external component) but can be increased to 200 by using resistor and capacitor between PIN 1 and 8, or just with a capacitor. Simply means that Voltage out is 200 times the Voltage IN. LM386 has a wide supply voltage range 4-12v. Below is the Pin diagram of LM386. Pin description of LM386 is given below along with the functions of external components used for amplification. Components • IC LM386 • Condensor Mic • Speaker 8ohm • Capacitors- 220uF, 10uF (two), 0.1uF, 0.05uF • Resistor- 10k (two) • Potentiometer- 100k • Battery 5-12v PIN 1 and 8: These are the gain control PINs, internally the gain is set to 20 but it can be increased up to 200 by using a capacitor between PIN 1 and 8. We have used 10uF capacitor C1 to get the highest gain i.e. Gain can be adjusted to any value between 20 to 200 by using proper capacitor. ![]() Pin 2 and 3: These are the input PINs for sound signals. Pin 2 is the negative input terminal, connected to the ground. Pin 3 is the positive input terminal, in which sound signal is fed to be amplified. In our circuit it is connected to the positive terminal of the condenser mic with a 100k potentiometer RV1. Potentiometer acts as volume control knob. Electronic mridangam software. Buy an Electronic Mridanga talam for sale. An electronic mridangam is an instrument that imitates the sound of an Indian percussion instrument known as the mridangam & manjira. Mridanga Talam Compact, Electronic Mridangam + Manjira: Amazon.in: Electronics. Mridanga Talam Compact, Electronic Mridangam + Manjira by Sound Labs. A capacitor C5 of 0.1uF has also been used along with potentiometer, to remove the DC component of input signal and only allow audio (AC component) to be fed into LM386. Pin 4 and 6: These are the power supply Pins of IC, Pin 6 for is +Vcc and Pin 4 is Ground. The circuit can be powered with voltage between 5-12v. Pin 5: This is the output PIN, from which we get the amplified sound signal. Nada dering aplikasi line. The output signal has both AC and DC component, and DC component is undesirable and can’t be fed to Speaker.
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