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10PC LM386 Super Mini Amplifier Board Power Electronic DIY Kit for Arduino 3-12V

Product Description

LM386 ultra miniature mini amplifier board kit instructions

Kit using the audio amplifier chip LM386, a simple external circuit, the audio signal is amplified. Circuit is simple, less use of components, welding easy. Sound volume are good, high cost, widely used in small speakers and other equipment.

Electrical characteristics 
Operating voltage: DC 5 ~ 12V;
Driver Speaker: 0.5W-10W Speaker 1;
PCB Size: 36 * 39mm

Circuit theory 
The main circuit LM386 audio amplifier chip and audio input adjustment circuit.
By potentiometer can adjust the size of the input audio signal, thereby controlling the size of the output audio outputs.

Note: 
The resistance value of 10 Euro, we suite offers 10 ohm resistor. This resistance is mainly a protective effect, does not require a lot of resistance.

 
 
 
 
1.All payments must be prepaid.
 
1. We are not responsible for undeliverable address, we reserve the right to charge the shipping fee again for returned items due to wrong address.
2. We will ship out your package by China post as soon as possible, it usually takes around 7-14 business days (USA, CA, AU, UK), others country takes around 10-20 business days (Brzil, India, RU), exact delivery time depends on postal process.
3. If you do not receive your item by 30 business days, Please feel free to contact us via ebay mail system, we will try our best to resolve any problems with you.
4. the import tax/duty is the buyer's responsibility, not included in the price and the shipping fee. It is charged by the custom of your country.
(Pls note, business days means Sat. & Sun. excluded)
1. We offer 30 days money back guarantee return policy .
2. Our warranty does not extended to any products that are physically damaged or that are not under normal operating conditions as a result of misuse or improper installation on the buyer/user's part.
3. For all returned products, buyers MUST contact us for the returning address.
4. In all cases, buyers pay shipping fees at their own cost to return products for exchange or refund. We will be responsible for the postage of replacements. Refund will be made upon receipt of the returned item.
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