2.1 Power Amplifier using TDA7377

This Power Amplifier using or based on IC TDA7377, that the TDA7377 IC has 4 channel input and 4 channel output. For using 2.1 Power Amplifier on two channel is bridge to one output so the output is 3 channel , one channel using for bass or subwoofer speaker. And the other 2 channel is using for mid and treble speaker. see circuit diagram below

2.1 Power Amplifier using Part Value :

Resistor 1/4W 5%

R1, R3, 2.7K – Red, Violet, Red, Gold

R2 3.3K – Orange, Orange, Red, Gold

R4, R11, R13 47K – Yellow, Violet, Orange, Gold

R5, R12, R15, R19, R20 8.2K – Gray, Red, Red, Gold

R6, R7 1k – Brown, Black, Red, Gold

R8 68K – Blue, Gray, Orange, Gold

R9, R10, R14, R18, R23, R26 10K – Brown, Black, Orange, Gold

R16, R17 22K – Red, Red, Orange, Gold

R21, R23 1.8K – Brown, Gray, Red, Gold

R22, R24 6.8K – Blue, Gray, Red, Gold

P1, P3 47K or 50K – Dual Potentiometer logarithmic

P2 100k – Dual Potentiometer

P4 47K or 50K – Single Potentiometer logarithmic

Capacitors electrolytic

C1 6800µF

C3, C4,C14, C19, C30 10µF

C5, C7, C8, C9, C10 4.7µF

C6, C28, C31 100µF

C22 0.47µF or Polyester

C33, C34 1000µF

Capacitors Polyester and ceramic

C2, C15, C20, C32 100nF (104) – Ceramic or Polyester

C11, C12 100pF (101) – Ceramic

C13 220nF (224) – Polyester

C16, C26, C27 100nF (104) – Polyester

C17, C18 6.8nF (682) – Polyester

C21, C23 4,7nF (472) – Polyester

C24, C25 33nF (333) – Polyester

C29 1nF (102) – Polyester

Semiconductors

B1 Bridge Rectifier FBU8K or equivalent 200V / 2A

IC1 7812 – positive voltage regulator 12 Volts

IC2, IC3 LM4558N or equivalent – Dual Operational Amplifier

IC4 TDA7377 

LED1 Red Led 5mm
Buy these components parts, go to Allchips.

The power amplifier includes a subwoofer and treble control, the power supply voltage 12 -15 Volt, you can use AC Current Voltage and DC Current Voltage So you can use battery 12V to operate this power amplifier.

2.1 Power Amplifier using TDA7377 Test