Circuit Audio Power Amplifier with Subwoofer – Mount Bridge – Using Ne5532 and 4 TDA2030 – 2 x 18 Watts stereo + 30 W sub
This circuit is typical of systems sold for 2.1 PC surround systems, left and right channel and subwoofer. Just plugging in the stereo audio and adjust the volume
Audio amplifier circuit using integrated TDA2030 and op amp Ne5532, has two stereo amplifier left and right satellite and Bass amplifier using TDA2030 in bridge for more power. The filter is made by double operational amplifier Ne5532. Complete assembly with the suggestion of the printed circuit board and has a power supply coupled to the circuit.
This circuit is a remake of another already posted on the Blog, but with some changes, uses two TDA ic’s in bridge to the subwoofer amp, with a new board design with some improvements. The idea is that to achieve maximum 18Watts satellites and the outputs 32 watts in Subwoofer … This power with a maximum of + -18 Volts Speakers and 4Ω. The circuit has adjustable volume for the stereo and subwoofer. Use pots of good quality to make this work.
By making the assembly check all connections and all components are correctly positioned, and the orientation of the pcb, be mounted inverted not seen it work, the components have to be positioned as illustrated above. When mounting make sure that the pin 7812 is different from 7912. Use a good heat sink to the TDA IC’s.
The power supply is already fixed in the pcb and simply add the transformer, to be with center tap on the secondary and primary according to the network (110/220). The capacitors can be supply of the 4700μF at 10000μF, the resistors are in parallel to discharge these capacitors Great. Always use good quality components in its assembly.
The appropriate transformer to the circuit, according to my withdrawal must be at least 4.5 A transformer or to the 55VA 12-0-12 Volts, to be about-16V +.
Schematic 2.1 audio Amplifier with TDA2030 in bridge (small size)
Suggested Printed Circuit Board 2.1 audio amplifier with Subwoofer Amplifier (small size)
List of material for assembly of the power amplifier with subwoofer using TDA2030 and Ne5532
|Resistors 1/4 W 5%|
|R1, R11, R22, R24||470 – Yellow, Violet, Brown, Gold|
|R13, R16, R26||22K – Red, Red, Orange, Gold|
|R2, R7,||22K 2 Watts – Red, Red, Orange, Gold|
|R3, R12, R23||33K – Orange, Orange, Orange, Gold|
|R4, R5, R14, R25||4.7K – Yellow, Violet, Red, Gold|
|R6, R10, R15, R18, R21, R29||10 – Brown, Black, Black, Gold|
|R8, R9, R17, R19, R20, R27, R28||10K – Brown, Black, Orange, Gold|
|C1, C4||10µF/25v – Polarized Electrolytic Capacitor|
|C2, C7||10000µF/35v* – Polarized Electrolytic Capacitor|
|C3, C8||1µF/250V – Polyester Film Capacitor|
|C5, C10, C13, C15, C17, C19, C22, C23, C24, C28||100n/ 100V- Polyester Film Capacitor|
|C6, C16,||2n2/100V – Polyester Film Capacitor|
|C9, C11, C12, C14, C18, C21, C25, C26||10µF/25v – Polyester Film Capacitor|
|C20||47µF/25v – Polyester Film Capacitor|
|C27||220n/100V – Polyester Film Capacitor|
|IC1||7912T – Negative Voltage Regulator -12V. Any prefix (LM, NS, KA, etc.).|
|IC2, IC4, IC5, IC7||TDA2030V – Audio amplifier integrated circuit|
|IC3||7812T – Positive Voltage Regulator +12 V Any prefix (LM, NS, KA, etc.).|
|IC6||NE5532N – Integrated Circuit Dual Operational Amplifier|
|B1||KBU8B – 100V 8A bridge rectifier or equivalent.|
|LED1||LED 3 or 5 mm any color|
|R-IN||2 Terminals Connector left channel audio input|
|R-OUT||2 Terminals Connector right channel audio output|
|L-IN||2 Terminals Connector left channel audio input|
|L-OUT||2 Terminals Connector left channel audio output|
|SUB||2 Terminals Connector Subwoofer audio output|
|AC||3Terminals Connector to the transformer|
|J1, J2, J3. J5, J6, J7, J9||J12MM – Piece of wire 12mm|
|J4||J5MM -Piece of wire 5mm|
|J8||J7MM – Piece of wire 7mm|
|P1||10k – Double logarithmic pot, Main Volume Adjustment|
|P2||10k – Logarithmic pot, adjust the subwoofer volume|
|Soldering, transformer 12 +12 / 4 Amps (50 Va), Wire, Box for Amplifier, PCB, heat sink for the IC TDA, etc..|
Download files for this assembly – PDF PCB, Schematic,PDF, silk screen, TDA2030A and NE5532 Datasheet .
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About the Author: Xtronic.org blog author. Electronics technician for the technical school of Brasilia - Brazil. Interested in electronics, circuits and technology in general.