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1. Chip LM386 incorporado
2. Diseño de circuito de 200 beneficios multiplicadores
3. Bloque de cableado de altavoz a bordo
4. Resistencia variable de 10 K a bordo, puedes ajustar el volumen de la ampliación
5. Indicador de alimentación a bordo
6. Los cables de chip pueden ser directamente de entrada de señal de audio.
7. Voltaje de funcionamiento: 5 ~ 12 V.
8. Tamaño de la placa: 41 mm x 13 mm.
Alicia
Comentado en los Estados Unidos el 21 de febrero de 2024
I teach junior high science, and in one of my lessons, I connected an LED to the audio output of my laptop so students could observe that the current changes directions inside a speaker. (LEDs have positive and negative terminals, so they only light up when the current is connected in the correct direction. So regular LEDs flicker on and off as the current changes, and two-color LEDs change colors). But the directions provided in the curriculum didn't work. Upon further reflection, LEDs require more current than my computer's audio output provides, so I needed an amplifier. But the amplifier sent with the curriculum didn't work either.So I brushed off my electronics skills and began preparing to build an amplifier using my capacitors, resistors, etc. One of the components I was lacking was the LM386 audio amplifier (which is one component of this piece of hardware). But this device was less expensive than buying all the missing components and building my own amplifier. Plus, you get 5 of them. I connected this amplifier to my LED and the experiment worked. (I had to bend the input pins so that the alligator clips from my audio-to-alligator-cable clips and wires from the battery could all connect, but there are circuit diagrams for this device easily found online).The sound quality wasn't great, but it would probably be better if this device were used as intended, soldered into a larger electronic device, rather than connected to other components using a breadboard. Also, the low-quality speaker I attached in parallel with the LED might have been part of the problem.
Customer
Comentado en los Estados Unidos el 17 de enero de 2024
This is a great little amplifier for anyplace you need to boost signal levels. One helpful hint: If the gain of 200 is too high (and it usually is for me) just remove C1 to drop the gain to 20.
Andrew Hynson
Comentado en los Estados Unidos el 9 de agosto de 2023
Easy to connect and it works
Josey
Comentado en los Estados Unidos el 12 de julio de 2022
If you are familiar with the lm386, that’s what you are getting . The lm386 uses a single rail voltage rather than a dual rail of +v and -v. They have about a 200 times amplification and are basically the only single rail amplifier out there. The lm386 IC chips are cheap but then you have to build a bunch of parts around it. This is a nice little package and you get 5 for a fair price. The wattage is about 125 milliwatts into an 8 ohm load. Decent for small speakers .
Shawn beeter
Comentado en los Estados Unidos el 4 de marzo de 2021
Absolutely terrible. I went against my gut to believe the previous reviews and I was dead wrong. These barely worked. I'm better off going to buy a $10 bluetooth speaker at dollar store to take it's board out.
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