DIY High Fidelity Deaf Hearing Aids Audio Amplifier Kit Digital Amplifier Board Module
Product Description
Product Description
Now our store is introducing a set of hearing aids made of discrete components, which is suitable for students majoring in electronics to study, research and school teaching and training.
Although the circuit is simple, but due to the addition of a negative feedback circuit, and the selection of a high-sensitivity electret microphone, making the sound loud and bright, high fidelity, can be heard within 10 meters.
As long as the correct welding according to the diagram, connected to the 3V button battery, plug in headphones (mono or dual channel headphones can be), the switch to the "on" position, you can normally use.
1 x DIY High Fidelity Deaf Hearing Aids Audio Amplifier Kit
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