Small amplifier and speakers made with TDA1521 ----- TDA1521 AMPLIFIER

Small amplifier and speakers made with TDA1521, TDA1521 AMPLIFIER Keywords: small amplifiers and speakers made with TDA1521 Small amplifier and speakers made with TDA1521 First, the power amplifier part The high-fidelity set is a block TDA1521, which is extremely concise, and there is also an overheating, stainless, short circuit and other protection circuits, suitable for beginners. The front level is enlarged by NE5532. Coupled capacitors can be used in domestic CBB capacitors, or tantalum capacitors. The front-level power supply is obtained by 7815, 7915 regulation, and the power transformer should be used for 30W. The rectifier can be used with a 3A full bridge. The power amplifier section is shown in Figure 1. The power supply part circuit is shown in Figure 2, and the circuit board can be carried out by an aesthetic knife, and the power platen should add a sufficiently large heat sink. Second, speaker 1. Speaker Unit: The treble unit uses a 3-inch high-frequency speaker for a surround box. The bass unit uses a 4.5-inch speaker for car audio. 2. Cabinet Making: The medium-thickness plate can be made of a medium-thickness plate with a thickness of 270 mm, a width of 170 mm, a thickness of 220 mm, and the guide hole is designed, so it should be kept at a certain distance from the wall when placing the speaker. Pick up the power amplifier and speaker, try to listen. I believe that the sound of causing the cost of hundreds of dollars will not be disappointed.

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