5.1 Surround Sound Decoder

The circuit of 5.1 surround sound decoder (audio  5.1/ Dolby Prologic), this circuit serves to convert analog signals stereo or 2-channel, into 5.1 ch. By using the non-digital decoder method, so this circuit processes analog signals with the IC Op-Amp 4558, so that signals that were stereo can change to 5.1 or 6 channels, namely Left, Right, Center, Rear Left, Rear Right, and Subwoofer. This circuit works with a 12V symmetrical voltage (12VDC CT). The following PCB Layout (Electro India) and its component list,

5.1 Surround Sound Decoder single layer PCB:

Part List Surround sound decoder:
2 Capacitor 1000UF25V
3 Capacitor 100uF
20 Capacitor 4.7uF
2 Capacitor 0.015uf = 153
1 Capacitor 0.022uf = 223
4 Capacitor 0.033uf = 333
2 Capacitor 0.04uf = 403 or 0.047uf = 473
5 Capacitor 0.1uf = 104
3 Capacitor 0.22uf = 224
1 Connector - Screw Terminal 3 Pin (5mm pitch)
1 Connector 2 Pin (2.54mm)
5 Connector 3 Pin (2.54mm)
2 Connector 6 Pin (2.54mm) for BASS TREBLE
4 Diode 1N4007
4 IC 4558D
1 IC UA741
4 Jumper
3 Preset 100K
1 Preset 10K
2 Preset 20K or 22K
15 Resistors 1/4 Watt 10K
1 Resistors 1/4 Watt 1K
1 Resistors 1/4 Watt 1K5
2 Resistors 1/4 Watt 220 OHM
4 Resistors 1/4 Watt 22K
6 Resistors 1/4 Watt 2K2
3 Resistors 1/4 Watt 33K
2 Resistors 1/4 Watt 390K or 330K
8 Resistors 1/4 Watt 3K3
4 Resistors 1/4 Watt 470 OHM
1 Resistors 1/4 Watt 470K
7 Resistors 1/4 Watt 4K7
2 Resistors 1/4 Watt 6K8
4 Transistor BC548
2 Zener Diode 12VZ
1 Diode 1N4148

Build and test by ELECTRO INDIA:

2 comments for "5.1 Surround Sound Decoder "

1. Is this prologic ii?

2. May I known Volume adjuster diagram in this video?