How to make a speaker? Please tell me "

For beginners, it is recommended to use integrated circuits. The peripheral circuits are simple and have better effects.

The most suitable power amplifier integrated circuits for beginners, I personally recommend the following two:

1. TDA2822 (the number can end with M), the maximum power is 1W per channel*2 =2W, it belongs to a two-channel power amplifier circuit;

2. TDA2030 (the tail number can contain A), the maximum power is 18W, it belongs to a mono-channel power amplifier integrated circuit;

Choose well After understanding the integrated circuit, you need to find the corresponding circuit diagram. A good circuit diagram plays a decisive role in the effect of the work!

If you choose TDA2822, it is recommended to use a single power supply. Do not use the so-called "BTL output" method on the Internet to connect the circuit. Although such a circuit has high power and low noise; for TDA2030, it is recommended to use dual power supplies. power supply, which reduces crossover distortion and improves efficiency. (Note: Do not use a switching power supply. The audio power amplifier circuit is only suitable for using a linear power supply, which is commonly known as a transformer)

The maximum power that the power amplifier integrated circuit can achieve under different operating voltages is different. , but the power supply must leave enough margin for the power amplifier. It is recommended that the power supply power be twice the maximum power of the power amplifier. In theory, the bigger the better, because this can avoid insufficient power supply when the instantaneous output power of the power amplifier is large, causing distortion. The filter capacitor should be a high-quality aluminum electrolytic capacitor. The withstand voltage should be higher, usually 25-50V. The power capacity is generally calculated as 5 watts per 1000 microfarads. You can try to get it as large as possible.

Search the Internet for circuit diagrams. Try to use the public version or the manufacturer's version instead of modified or simplified ones. Although the circuit is simple, it is prone to problems.

In response to your questions, I can generally only answer so much. I usually stay on the AiHIFI Forum. If you have any questions, please come to me on the expert version of the AiHIFI Audio Forum.