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Bill of materials
Dilshan R Jayakody edited this page Jun 29, 2019
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Following tables contain components needed to assemble the USB display module. To overcome the PCB manufacturing cost, and reduce the board size, we employ many surface-mounted components into this module.
| Reference designator | Value | Quantity | Notes |
|---|---|---|---|
| C1, C2 | 100pF | 2 | SMD 0805 Package |
| C3, C4 | 22pF | 2 | SMD 0805 Package |
| C5, C6, C7, C8, C9 | 0.1μF 16V | 5 | SMD 0805 Package |
| R1, R4, R15, R16, R17, R18, R19, R20, R21, R22, R23, R24, R25 | 10K | 13 | SMD 0805 Package |
| R2, R3 | 22Ω | 2 | SMD 0805 Package |
| R5, R6, R7, R8, R9, R10, R11, R12 | 100Ω | 8 | SMD 0805 Package |
| R13, R14 | 100K | 2 | SMD 0805 Package |
| FB1 | BL01RN1A2A2 | 1 | 5mm Ferrite Bead |
| Y1 | 32.768kHz - AB26T crystal | 1 | |
| Y2 | 8.00MHz - HC49-U crystal | 1 | |
| BT1 | CR2025 / CR2032 battery holder | 1 | |
| BZ1 | 12x 9.5 Buzzer | 1 | |
| J1 | USB female type B vertical connector | 1 | |
| J2 | 2.54mm - 4pin vertical pin header | 1 | |
| J3 | 2.54mm - 2pin vertical pin header | 1 |
This section contains a list of semiconductor components used in the USB display module. Most of these components can replace with substitute components available the market.
| Reference designator | Value | Quantity | Package | Datasheet |
|---|---|---|---|---|
| Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, Q10, Q11 | MMBT3904 | 11 | SOT-23 | https://assets.nexperia.com/documents/data-sheet/MMBT3904.pdf |
| U1 | STM32F103CBT6 | 1 | LQFP-48 | https://www.st.com/resource/en/datasheet/cd00161566.pdf |
| U2, U3, U4, U5, U6, U7, U8, U9, U10, U11, U12 | LTS-6780R | 10 | http://datasheet.octopart.com/LTS-6780R-Lite-On-datasheet-7270056.pdf | |
| U12 | AMS1117-3.3 | 1 | SOT-223 | www.advanced-monolithic.com/pdf/ds1117.pdf |