{"product_id":"lm386-audio-power-amplifier","title":"LM386 Audio Power Amplifier in Pakistan","description":"\u003ch2\u003eDescription:\u003c\/h2\u003e\n\u003cdiv class=\"electro-description\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eLM386 Audio Power Amplifier\u003c\/strong\u003e is use in low voltage consumer applications. The gain is set to 20 to keep external part count low. But the addition of an external resistor and capacitor between pins 1 and 8 will increase the gain to any value from 20 to 200.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eLM386\u003c\/strong\u003e is an integrated circuit containing a low voltage audio power amplifier. It is suitable for battery-powered devices such as radios, guitar amplifiers, and hobby electronics projects. The IC consists of an 8 pin dual in-line package (DIP-8) and can output 0.25 to 1 watts of power depending on the model using a 9-volt power supply.\u003c\/p\u003e\n\u003ch2\u003eFeatures:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBattery operation\u003c\/li\u003e\n\u003cli\u003eMinimum external parts\u003c\/li\u003e\n\u003cli\u003eWide supply voltage range: 4V-12V or 5V-18V\u003c\/li\u003e\n\u003cli\u003eLow quiescent current drain: 4mA\u003c\/li\u003e\n\u003cli\u003eVoltage gains from 20 to 200\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"post-title\"\u003e\u003cstrong\u003e\u003ca href=\"https:\/\/circuitdigest.com\/electronic-circuits\/lm386-audio-amplifier-circuit\"\u003eLM386 Based Audio Amplifier Circuit:\u003c\/a\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cimg class=\"alignnone\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0965\/3623\/2249\/files\/LM386-Audio-Amplifier.jpg?v=1789233065\" alt=\"LM386 Audio Power Amplifier \" width=\"650\" height=\"393\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLM386 audio amplifier\u003c\/strong\u003e can amplify sound from Microphone. This circuit can use as “Small mic and loudspeaker system” for a small space like a room. This circuit  also use in many applications like portable music players, intercoms, radio amplifiers, TV sound systems, Ultrasonic drivers etc. It also uses as sound sensor for microcontrollers. It is inexpensive, low power operate and only need few components to work. This circuit is based on \u003cstrong\u003eLM386 IC\u003c\/strong\u003e to amplify sound.\u003c\/p\u003e\n\u003ch2\u003eUse:\u003c\/h2\u003e\n\u003cp class=\"rtejustify\"\u003eLM386 is a low voltage audio amplifier and frequently used in battery powered music devices like radios, guitars, toys etc. The gain range is 20 to 200, gain is internally set to 20 (without using external component) but can  increase to 200 by using resistor and capacitor between PIN 1 and 8, or just with a capacitor. \u003ca href=\"https:\/\/circuitdigest.com\/calculators\/op-amp-gain-calculator\"\u003eVoltage gain\u003c\/a\u003e simply means that Voltage out is 200 times the Voltage IN. LM386 has a wide supply voltage range 4-12v. Below is the \u003cstrong\u003ePin diagram of LM386\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp class=\"rtejustify\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0965\/3623\/2249\/files\/LM386.png?v=1789233067\" alt=\"Audio Amplifier LM386 Pinout\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch2 class=\"rtejustify\"\u003e\u003cstrong\u003eComponents\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli class=\"rtejustify\"\u003eIC LM386\u003c\/li\u003e\n\u003cli class=\"rtejustify\"\u003eCondensor Mic\u003c\/li\u003e\n\u003cli class=\"rtejustify\"\u003eSpeaker 8ohm\u003c\/li\u003e\n\u003cli class=\"rtejustify\"\u003eCapacitors- 220uF, 10uF (two), 0.1uF, 0.05uF\u003c\/li\u003e\n\u003cli class=\"rtejustify\"\u003eResistor- 10k (two)\u003c\/li\u003e\n\u003cli class=\"rtejustify\"\u003ePotentiometer- 100k\u003c\/li\u003e\n\u003cli class=\"rtejustify\"\u003eBattery 5-12v\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"rtejustify\"\u003e\u003cstrong\u003ePIN 1 and 8:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"rtejustify\"\u003e These are the gain control PINs, internally the gain is set to 20 but it can increase up to 200 by using a capacitor between PIN 1 and 8. We use 10uF capacitor C1 to get the highest gain i.e. 200. Gain can adjust to any value between 20 to 200 by using proper capacitor.\u003c\/p\u003e\n\u003ch2 class=\"rtejustify\"\u003e\u003cstrong\u003ePin 2 and 3:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"rtejustify\"\u003eThese are the input PINs for sound signals.  2 is the negative input terminal, that connects to the ground.  3 is the positive input terminal, in which sound signal is  amplify. In our circuit it is connect to the positive terminal of the condenser mic with a 100k potentiometer RV1. Potentiometer acts as volume control knob.\u003c\/p\u003e\n\u003cp class=\"rtejustify\"\u003eA capacitor C5 of 0.1uF is use along with potentiometer, to remove the DC component of input signal and only allow audio (AC component) to fed into LM386.\u003c\/p\u003e\n\u003ch2 class=\"rtejustify\"\u003e\u003cstrong\u003ePin 4 and 6:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"rtejustify\"\u003e These are the power supply Pins of IC, Pin 6 for is +Vcc and Pin 4 is Ground. The circuit can also power with voltage between 5-12v.\u003c\/p\u003e\n\u003ch2 class=\"rtejustify\"\u003e\u003cstrong\u003ePin 5:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"rtejustify\"\u003e This is the output PIN, from which we get the amplified sound signal.\u003c\/p\u003e\n\u003cp class=\"rtejustify\"\u003eThe output signal has both AC and DC component, and DC component is undesirable and can’t be fed to Speaker. So to remove this DC component, a capacitor C2 of 220uF has been used. This has the same function as Capacitor C5 (0.1uF) at input side.\u003c\/p\u003e\n\u003cp class=\"rtejustify\"\u003eAlong with this capacitor, a filter circuit of Capacitor C3 (.05uF) and resistor R1 (10k) has been used at the output PIN 5. This filter also called the \u003cstrong\u003e“\u003c\/strong\u003eZobel network”, this electronic filter is use to remove the sudden High frequency oscillations or noise.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003ePin 7:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThis is the bypass terminal. It can  left open or  maybe ground using a capacitor for stability.\u003c\/p\u003e\n\u003ch2\u003ePackages Include:\u003c\/h2\u003e\n\u003cp\u003e1×LM386 Audio Power Amplifier\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Electronics Hub","offers":[{"title":"Default Title","offer_id":54466794357049,"sku":"product-6226","price":25.0,"currency_code":"PKR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0965\/3623\/2249\/files\/AR0152-LM386-AMPLIFICADOR-de-Potencia-de-Audio-DIP-8_V1-1.jpg?v=1789233074","url":"https:\/\/electronicshub.pk\/products\/lm386-audio-power-amplifier","provider":"Electronics Hub","version":"1.0","type":"link"}