2 layers120.1 × 120 mm
Mono amplifier
dario0603/AB-class-amplifier
Design and simulation of a Class-AB audio power amplifier, focusing on output-stage linearity, crossover distortion reduction, and overcurrent protection.
97 parts1
4 layers149.2 × 185.3 mm
Amplifier
scout-cc/SkripsieProjectDesigns and reports for personal final year engineering project
- Size
- 149.2 × 185.3 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 239
- Nets
- 153
- Pads
- 663
- Tracks, vias
- 1,370, 10
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 2 Jun 2026
- Updated
- 23 Oct 2026
Overview
Amplifier is an open-source printed circuit board by scout-cc, from the scout-cc/SkripsieProject repository on GitHub. It is a 4-layer board of 149.2 × 185.3 mm with 239 parts on 153 nets, routed with 1,370 tracks and 10 vias.
It is built around the TL081, TLV75533PDBVR-MS and BC546, with the BD140, BD139 and TIP36 among its other parts. Its parts include 72 capacitors, 57 resistors, 22 transistors, 12 ICs and 11 connectors. It belongs with the audio and music boards and the STM32 boards of this library.
Main components
6
TL081
SOP-8-18V~18V -20℃~+85℃ 1 1.8mA 100pA 200nA 20V/us 3MHz 3mV 85dB Built-in compensation SOP-8 Operational Amplifier ROHSGcoreOperational Amplifier
TLV75533PDBVR-MS
SOT-23-5SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMSKSEMIUncategorised
BC546
TO-921 NPN 100mA 100nA 300MHz 500mW 65V 6V 800 90mV、250mV NPN TO-92 Bipolar (BJT) ROHSDDFBipolar (BJT)
BD140
TO-126-65℃~+150℃ 1 PNP 1.25W 1.5A 100nA 500mV 5V 63 80V PNP TO-126 Bipolar (BJT) ROHSSTMicroelectronicsBipolar (BJT)BD139
TO-126-65℃~+150℃ 1 NPN 1.5A 10uA 12.5W 500mV 5V 63 80V NPN TO-126 Bipolar (BJT) ROHSSTMicroelectronicsBipolar (BJT)
TIP36
TO-3PN1 PNP 125W 25A 3MHz 40V 4V 5V 700uA 75 PNP TO-3PN Bipolar (BJT) ROHSSPTECHBipolar (BJT)
README
README.mdSkripsieProject
Designs and reports for personal final year engineering project
Parts
239| Qty | Value | Footprint | References |
|---|---|---|---|
| 28 | 100n | Capacitor_THT:C_Rect_L7.2mm_W2.5mm_P5.00mm | C10, C15, C18, C19, C24, C25, C26, C27, C34, C35, C37, C45, C46, C47, C51, C53 +12 |
| 11 | GND | TestPoint:TestPoint_Bridge_Pitch2.0mm_Drill0.7mm | TP21, TP22, TP23, TP24, TP25, TP26, TP27, TP28, TP29, TP30, TP31 |
| 10 | 100u | Capacitor_THT:CP_Radial_D6.3mm_P2.50mm | C30, C32, C36, C38, C41, C43, C48, C49, C63, C66 |
| 9 | 4.7u | KiCADModels:GCJ31CC71H475KA01L | C1, C2, C28, C39, C52, CIN1, CIN2, CIN3, CIN4 |
| 8 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2, R11, R12, R49, R50, R51, R52 |
| 8 | 1u | KiCADModels:GJ821BR71H105KA12L | C11, C12, C17, C21, C22, C23, CVCC1, CVCC2 |
| 8 | BC546 | Package_TO_SOT_THT:TO-92_Inline | Q1, Q2, Q4, Q6, Q11, Q13, Q14, Q16 |
| 7 | 100k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R6, R7, R9, R48, R55, RFBT1, RFBT2 |
| 6 | 1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R17, R19, R22, R32, R34, R39 |
| 6 | TL081 | Package_DIP:DIP-8_W7.62mm_LongPads | U1, U2, U3, U4, U5, U6 |
| 5 | 3.3k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R4, R25, R26, R40, R41 |
| 4 | .33 | Resistor_THT:R_Box_L26.0mm_W5.0mm_P20.00mm | R28, R29, R44, R45 |
| 4 | 10k | KiCADModels:Bourns_PTD902_Dual_Horizontal | RV5, RV6, RV7, RV8 |
| 4 | 1N4007 | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D1, D2, D3, D4 |
| 4 | 22k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R18, R23, R33, R38 |
| 4 | 22u | KiCADModels:G-32_MUR | COUT1, COUT2, COUT5, COUT6 |
| 4 | 270 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R27, R30, R42, R43 |
| 4 | 470 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3, R5, R8, R10 |
| 4 | BD140 | Package_TO_SOT_THT:TO-126-3_Vertical | Q5, Q7, Q15, Q18 |
| 4 | T4A | Fuse:Fuseholder_Cylinder-5x20mm_Schurter_0031_8201_Horizontal_Open | F1, F2, F3, F4 |
| 4 | TestPoint | TestPoint:TestPoint_Bridge_Pitch2.0mm_Drill0.7mm | TP13, TP16, TP17, TP20 |
| 3 | 2.2u | KiCADModels:ECEA1HN2R2U | C3, C4, C5 |
| 3 | VCC | TestPoint:TestPoint_Bridge_Pitch2.0mm_Drill0.7mm | TP2, TP3, TP9 |
| 2 | +5V | TestPoint:TestPoint_Bridge_Pitch2.0mm_Drill0.7mm | TP4, TP5 |
| 2 | 1.8k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R21, R37 |
| 2 | 10 | Resistor_THT:R_Axial_DIN0411_L9.9mm_D3.6mm_P15.24mm_Horizontal | R31, R46 |
| 2 | 100p | KiCADModels:C0805C101J5GACTU | C29, C40 |
| 2 | 10u | KiCADModels:IND_SRP1038A_BRN | L1, L2 |
| 2 | 10u | KiCADModels:CAP_GCM32_MUR | C20, C54 |
| 2 | 1k | Potentiometer_THT:Potentiometer_Bourns_3296W_Vertical | RV1, RV2 |
| 2 | 2.7k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R13, R16 |
| 2 | 220 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R14, R15 |
| 2 | 220n | Capacitor_THT:C_Rect_L7.2mm_W2.5mm_P5.00mm | CHF1, CHF2 |
| 2 | 22n | Capacitor_THT:C_Rect_L7.2mm_W2.5mm_P5.00mm | C6, C13 |
| 2 | 24.9k | Resistor_SMD:R_0805_2012Metric | RFBB1, RFBB2 |
| 2 | 27k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R20, R35 |
| 2 | 300p | KiCADModels:C0805C301J5GACTU | C33, C44 |
| 2 | 300p | KiCADModels:C0805C101J5GACTU | C31, C42 |
| 2 | 47p | Capacitor_THT:C_Rect_L7.2mm_W2.5mm_P5.00mm | C14, C16 |
| 2 | 560 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R24, R36 |
| 2 | BCM846BS-7 | Package_TO_SOT_SMD:SOT-363_SC-70-6 | Q23, Q24 |
| 2 | BD139 | Package_TO_SOT_THT:TO-126-3_Vertical | Q9, Q17 |
| 2 | LMR36520FADDAR | Package_SO:Texas_HTSOP-8-1EP_3.9x4.9mm_P1.27mm_EP2.95x4.9mm_Mask2.4x3.1mm_ThermalVias | U7, U8 |
| 2 | TIP35 | Package_TO_SOT_THT:TO-247-3_Horizontal_TabDown | Q8, Q20 |
| 2 | TIP36 | Package_TO_SOT_THT:TO-247-3_Horizontal_TabDown | Q10, Q19 |
| 1 | +15V | TestPoint:TestPoint_Bridge_Pitch2.0mm_Drill0.7mm | TP10 |
| 1 | +3.3V | TestPoint:TestPoint_Bridge_Pitch2.0mm_Drill0.7mm | TP6 |
| 1 | -15V | TestPoint:TestPoint_Bridge_Pitch2.0mm_Drill0.7mm | TP7 |
| 1 | 0.1u | Capacitor_THT:C_Rect_L7.2mm_W2.5mm_P5.00mm | C50 |
| 1 | 1.5n | Capacitor_THT:C_Rect_L7.2mm_W2.5mm_P5.00mm | C9 |
| 1 | 100 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R53 |
| 1 | 220u | Capacitor_THT:CP_Radial_D6.3mm_P2.50mm | COUT4 |
| 1 | 2N3904 | Package_TO_SOT_THT:TO-92_Inline | Q21 |
| 1 | 2N7002 | Package_TO_SOT_SMD:SOT-23 | Q22 |
| 1 | 4.7k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R54 |
| 1 | 6.8k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R47 |
| 1 | Conn_01x03_Pin | KiCADModels:CUI_SJ1-3513 | J1 |
| 1 | DEBUG | Connector_JST:JST_PH_B5B-PH-K_1x05_P2.00mm_Vertical | J7 |
| 1 | EQ_OUT | Connector_JST:JST_PH_B3B-PH-K_1x03_P2.00mm_Vertical | J11 |
| 1 | Fan Power and GND | KiCADModels:Molex_Micro-Fit_3.0_43045-0812_2x04_P3.00mm_Vertical | J5 |
| 1 | Fan Tach and PWM | Connector_JST:JST_XH_B8B-XH-A_1x08_P2.50mm_Vertical | J4 |
| 1 | FanPWM | TestPoint:TestPoint_Bridge_Pitch2.0mm_Drill0.7mm | TP12 |
| 1 | FanPWR | TestPoint:TestPoint_Bridge_Pitch2.0mm_Drill0.7mm | TP1 |
| 1 | In+ | TestPoint:TestPoint_Bridge_Pitch2.0mm_Drill0.7mm | TP14 |
| 1 | In- | TestPoint:TestPoint_Bridge_Pitch2.0mm_Drill0.7mm | TP15 |
| 1 | LCD I2C | Connector_PinHeader_2.00mm:PinHeader_1x04_P2.00mm_Vertical | J3 |
| 1 | LM317_TO-220 | Package_TO_SOT_THT:TO-220-3_Horizontal_TabDown | U10 |
| 1 | LM337_TO220 | Package_TO_SOT_THT:TO-220-3_Horizontal_TabDown | U11 |
| 1 | Main Power In | KiCADModels:PHOENIX_1829167 | J2 |
| 1 | Out+ | TestPoint:TestPoint_Bridge_Pitch2.0mm_Drill0.7mm | TP18 |
| 1 | Out- | TestPoint:TestPoint_Bridge_Pitch2.0mm_Drill0.7mm | TP19 |
| 1 | PA_IN | Connector_JST:JST_PH_B3B-PH-K_1x03_P2.00mm_Vertical | J10 |
| 1 | Power In | KiCADModels:PHOENIX_1829167 | J9 |
| 1 | Power To Amp | KiCADModels:PHOENIX_1829167 | J8 |
| 1 | STM32G031K8Tx | Package_QFP:LQFP-32_7x7mm_P0.8mm | U12 |
| 1 | SW_Push | Button_Switch_THT:SW_PUSH_6mm_H5mm | SW1 |
| 1 | Speakers | KiCADModels:PHOENIX_1757242 | J12 |
| 1 | TLV75533PDBVR | Package_TO_SOT_SMD:SOT-23-5 | U9 |
| 1 | TempPUL | TestPoint:TestPoint_Bridge_Pitch2.0mm_Drill0.7mm | TP11 |
| 1 | VEE | TestPoint:TestPoint_Bridge_Pitch2.0mm_Drill0.7mm | TP8 |
The 231 most common of 239 parts.
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Questions
How big is the Amplifier PCB?
It measures 149.2 × 185.3 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Amplifier use?
239 parts, built around the TL081, TLV75533PDBVR-MS, BC546 and BD140. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Amplifier KiCad files?
From the scout-cc/SkripsieProject repository on GitHub, at the commit this page was made from: the board is Amplifier KiCAD/amplifier.kicad_pcb and its schematic Amplifier KiCAD/-15VRegulator.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Amplifier design in my own project?
Its repository states no licence, so its author keeps all rights: ask scout-cc before reusing the design.