Audio Stereo Amplifier KitThis kit will teach you how amplifiers take a small signal and amplify it to drive two small speakers or headphones. It is based on two LM386 ICs and one LM1458 IC. The LM386 chip is not a toy, for it is designed to be used in a variety of consumer electronics applications like AM/FM radio amplifiers, portable tape or CD players, intercoms, TV sound systes, and more.
The kit provides up to 1 watt of low-distortion audio power. Harmonic distortion is 0.2% with a voltage gain up to 46dB. You supply the speakers/headset and input power source.
NOTE: The 9V battery snap shown in the image above is not included. Input power must be well-filtered and regulated and should be between +7 and +15 VDC, but +9V DC is recommended, especially if you are using this with other kits from Rainbowkits.
|R2, R11||1K ohm resistor (brown, black, red)|
|R7, R12||10K ohm resistor (brown, black, orange) (use with mic only)|
|R3, R8||51K ohm resistor (green, brown, orange)|
|R4, R5||100K ohm resistor (brown, black, yellow)|
|R6, R9||270 ohm resistor (red, violet, brown)|
|R1, R10||10K or 5K trim pot (horizontal)|
|C2, C3||4.7µF or 10µF capacitor|
|C7, C8, C11, C12||Optional capacitors (see text) (customer supplied)|
|C1, C4, C6, C9||0.1µF capacitor (marked .1 or 104)|
|C5, C10||47µF capacitor|
|U2, U3||LM386 audio output IC|
|U1S, U2S, U3S||8-pin IC sockets|
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