Use waste circuit board (TDA1013) to make inexpensive audio ----- TDA1013 AMPLIFIER

Using WPCB (TDA1013) made cheap stereo, TDA1013 amplifier Keywords: TDA1013, PA I bought three ternary price TDA1013B blocks, and scrap circuit boards and disassemble parts produced a super-low sound. TDA1013B commonly used in large-screen color television sound system, which has an internal volume by logarithmic curve DC control circuit, a power supply voltage 10V ~ 30V, a separate pre-amplification and power amplification, the power supply voltage 14V, the load 8 ohms, the output power of 10w. ⑦ feet changing voltage (0v ~ 5V), adjust the volume level, and no sliding noise. To find a suitable waste board, all parts removed, in accordance with the circuit of Figure 1, fitted with three integrated circuits in the respective welding positions around the RC element, fly line or off carefully increased copper wires. Subwoofer dual op amp circuit (the NE5532) requires positive and negative power supply, preferably a mobile phone charger in the waste does not exceed the height of 4cm transformer 3 constitute a positive and negative power in accordance with the circuit of FIG. The power amplifier power electronic ballasts transform shown in Figure 4. Remove the original choke coil, the primary coil change, enameled secondary winding 18 with Φ0.31mm circle, the center tap. The diode must use a quick recovery diode. FIG 2 is a dual input of the switching circuit, J is small 12v dual relay, with a housing car cassette player transformation. Author: Chung Sang Wai

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