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STD PreAmp4v3-public
Profile：An Audio Pre-Amplifier that provides active Volume, Bass and Treble Control.
Description
An Audio Pre-Amplifier that provides active Volume, Bass and Treble Control.
Based on the Baxandall design for Logarithmic Volume, Bass and Treble Control.
Complete instructions, test results, detailed description and more can be found at https://www.protoriam.com/preamp4/index.html
Design Drawing
schematic diagram
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| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | PORT-2PIN-P2.54 | AIN1,AOUT1,PWR1 | PORT-2PIN-P2.54-GENERIC | 3 |
| 2 | 15n | C1,C2 | C1206 | 2 |
| 3 | 100n | C3,C32 | C1206 | 2 |
| 4 | 22p | C4,C12 | C1206 | 2 |
| 5 | 10uF | C11,C31 | C1206 | 2 |
| 6 | 1uF | C21 | C1206 | 1 |
| 7 | RED (1.7V) | D31 | LED1206-R-RD | 1 |
| 8 | SPACER1 | P1,P2,P3,P4 | SPACER1 | 4 |
| 9 | GND | POT-GND1,POT-GND2 | PORT-1PIN-P2.54 | 2 |
| 10 | 2k | R1,R2,R31 | R1206 | 3 |
| 11 | 10k | R3,R14 | R1206 | 2 |
| 12 | 4.7k | R4,R11,R12 | R1206 | 3 |
| 13 | 100k | R21,R22 | R1206 | 2 |
| 14 | 10k | RB1,RT1,RV1 | RK0971110D88 | 3 |
| 15 | PJ-327A0-SMT | AIN3 | AUDIO-SMD_PJ-327A0-SMT | 1 |
| 16 | TL972IDR | U1 | SOIC-8_L5.0-W4.0-P1.27-LS6.0-BL | 1 |
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