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Bill of materials
Dilshan R Jayakody edited this page Oct 21, 2025
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The following is the complete Bill of Materials (BoM) for the Arduino Mini Amplifier project.
All resistors used are ±5% tolerance types. To minimize PCB size, SMD components were used wherever possible, while still ensuring all parts remain commonly available and easy to source.
| Reference | Description | Package | Qty | Link | Datasheet |
|---|---|---|---|---|---|
| A1 | Arduino Nano V3 | THT | 1 | Arduino Store | Datasheet |
| U1 | TDA8425 Stereo Tone Control IC | DIP-20 | 1 | AliExpress | Datasheet |
| U2-U4 | NE5532 Dual Op-Amp | SOP-8 | 3 | AliExpress | Datasheet |
| U5 | YDA138 Digital Audio Amplifier | SSOP-42 | 1 | AliExpress | Datasheet |
| U6 | MC78L05 Voltage Regulator | SOT-89-3 | 1 | AliExpress | Datasheet |
| U7 | AC6939 Bluetooth Audio Module | THT | 1 | AliExpress | — |
| DS1 | WC1602A 16x2 LCD Display (Blue) | THT | 1 | AliExpress | Datasheet |
| Reference | Value | Package | Qty | Link |
|---|---|---|---|---|
| C1, C15, C20, C21 | 100µF / 16V | SMD 6.3×5.4 | 4 | AliExpress |
| C2, C7, C8, C28, C30, C35, C51, C52, C55 | 0.1µF | SMD 0805 | 9 | AliExpress |
| C3-C6 | 0.47µF | SMD 0805 | 4 | AliExpress |
| C9, C11 | 0.0056µF | SMD 0805 | 2 | AliExpress |
| C10, C12 | 0.033µF | SMD 0805 | 2 | AliExpress |
| C13, C14 | 0.015µF | SMD 0805 | 2 | AliExpress |
| C16-C27, C42, C57 | 1µF | SMD 0805 | 12 | AliExpress |
| C40, C41 | 1µF / 50V | SMD 4×4.5 | 2 | AliExpress |
| C29 | 33µF / 25V | SMD 6.3×5.3 | 1 | AliExpress |
| C31, C53 | 220µF / 16V | SMD 6.3×5.7 | 2 | AliExpress |
| C32, C34 | 10µF / 25V | SMD 5×5.3 | 2 | AliExpress |
| C33, C43, C44, C54 | 330µF / 25V | SMD 6.3×5.8 | 4 | AliExpress |
| C36-C39 | 4.7µF / 50V | SMD 4×5.4 | 4 | AliExpress |
| C45, C47, C48, C50, C56 | 0.01µF | SMD 0805 | 5 | AliExpress |
| C46, C49 | 0.22µF | SMD 0805 | 2 | AliExpress |
| Reference | Value | Package | Qty | Link |
|---|---|---|---|---|
| R1, R2 | 0Ω | THT wire | 2 | — |
| R3, R4 | 2.2KΩ | SMD 0805 | 2 | AliExpress |
| R5-R8, R11, R12, R17, R18, R24 | 10KΩ | SMD 0805 | 9 | AliExpress |
| R9, R10 | 15KΩ | SMD 0805 | 2 | AliExpress |
| R13-R16, R22 | 1KΩ | SMD 0805 | 5 | AliExpress |
| R19 | 20KΩ | SMD 0805 | 1 | AliExpress |
| R20 | OPT (Optional) | SMD 0805 | 1 | — |
| R21 | 330KΩ | SMD 0805 | 1 | AliExpress |
| R23, R25, R26, R28 | 5.6KΩ | SMD 0805 | 4 | AliExpress |
| R27, R29 | 47KΩ | SMD 0805 | 2 | AliExpress |
| R30 | 330Ω | SMD 0805 | 1 | AliExpress |
| R31, R34, R35 | 100Ω | SMD 0805 | 3 | AliExpress |
| R32, R33 | 4.7KΩ | SMD 0805 | 2 | AliExpress |
| RV1 | 50KΩ Potentiometer (TC33X-2-503E) | SMD | 1 | AliExpress |
| Reference | Description | Package | Qty | Link | Datasheet |
|---|---|---|---|---|---|
| D1 | 1N5401 Rectifier Diode | DO-201 | 1 | AliExpress | Datasheet |
| D2, D3 | LL4148 Switching Diode | SOD-80 | 2 | AliExpress | Datasheet |
| D4 | M7 Rectifier Diode | SMA | 1 | AliExpress | Datasheet |
| Q1 | BC858 PNP Transistor | SOT-23 | 1 | AliExpress | Datasheet |
| Q2-Q4 | BC817 NPN Transistor | SOT-23 | 3 | AliExpress | Datasheet |
| Reference | Value | Package | Qty | Link |
|---|---|---|---|---|
| L1 | 330µH | SMD 10.4×10.4 | 1 | AliExpress |
| L2-L5 | 22µH | SMD 7.3×7.3 | 4 | AliExpress |
| L6 | 2.2mH Power Inductor | THT 9.5mm | 1 | AliExpress |
| Reference | Description | Package | Qty | Link |
|---|---|---|---|---|
| J1, J3 | PJ307 3.5mm Stereo Jack | THT | 2 | AliExpress |
| J2 | DC-005 5.5×2.1mm Power Jack | THT | 1 | AliExpress |
| J4, J5 | RCA Jack (AV-8.4-3) | THT | 2 | AliExpress |
| JP3, JP4 | 3-pin Header + Jumper Cap | 2.54mm | 2 | AliExpress |
| F1 | RUEF300 Resettable Fuse | THT | 1 | AliExpress |
| K1 | HK19F-DC-12-SHG Relay | THT | 1 | AliExpress |
| SW1-SW4 | 6mm Tactile Push Button | THT | 4 | AliExpress |
| — | 2.54mm Female Header (40-pin) | THT | 2 | AliExpress |
| — | 2.54mm Pin Header (40-pin) | THT | 1 | AliExpress |