| No | Part number | Description ( Function ) | Manufacturers | |
| 2 | TDA7468 | TWO BANDS DIGITALLY CONTROLLED AUDIO PROCESSOR TDA7468 TWO BANDS DIGITALLY CONTROLLED AUDIO PROCESSOR WITH BASS ALC SURROUND 1 FEATURES INPUT MULTIPLEXER – 4 STEREO INPUTS – SELECTABLE INPUT GAIN FOR OPTIMAL ADAPTATION TO DIFFERENT SOURCES ONE STEREO OUTPUT BASS ALC TREBLE AND BASS CONTROL IN 2.0dB STEPS VOLUME CONTROL IN 1.0dB STEPS TWO SPEAKER ATTENUATORS: – TWO INDEPENDENT SPEAKER CONTROL IN 1 |
 STMicroelectronics |
|
| 1 | TDA7468D | TWO BANDS DIGITALLY CONTROLLED AUDIO PROCESSOR WITH BASS ALC SURROUND TDA7468D TWO BANDS DIGITALLY CONTROLLED AUDIO PROCESSOR WITH BASS ALC SURROUND 1 ■ FEATURES INPUT MULTIPLEXER – 4 STEREO INPUTS – SELECTABLE INPUT GAIN FOR OPTIMAL ADAPTATION TO DIFFERENT SOURCES ONE STEREO OUTPUT BASS ALC TREBLE AND BASS CONTROL IN 2.0dB STEPS VOLUME CONTROL IN 1.0dB STEPS TWO SPEAKER ATTENUATORS: – TWO INDEPENDENT SPEAKER CONTROL IN 1.0dB STEPS FOR B |
 ST Microelectronics |
|
List of most widely used semiconductors
| Part Number | Function | Manufacturers | |
| 1N4007 | The 1N4007 is a rectification diode that is designed for high-voltage applications, typically up to 1000V. It has a maximum current rating of 1A and a forward voltage drop of around 0.7V. |
 Vishay |
|
| LM317 | This is a popular adjustable voltage regulator. |
 ON Semiconductor |
|
6N137 | LM393 | 2N3906 | 2N2222 | TIP120 | 1N5818 | LM324N | A1015 | SMAJ20CA |
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