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Bill of materials
Dilshan R Jayakody edited this page May 21, 2021
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1 revision
The following tables contain components needed to assemble the programmable timer module. To overcome the PCB manufacturing cost and reduce the board size, we use many surface-mounted parts in this module.
| Designator | Value | Package | Quantity | Notes |
|---|---|---|---|---|
| R201, R202 | 4.7K - 5% Resistor | SMD 0805 | 2 | |
| R203, R204 | 10K - 5% Resistor | SMD 0805 | 2 | |
| R205 | 1K - 5% Resistor | SMD 0805 | 1 | |
| C101 | 10MFD - 16V Electrolytic Capacitor | THT | 1 | |
| C102, C202, C303, C304 | 0.1MFD - 16V Ceramic Capacitor | SMD 0805 | 4 | |
| C103 | 4.7MFD - 16V Electrolytic Capacitor | THT | 1 | |
| C201 | 1MFD - 16V Ceramic Capacitor | SMD 0805 | 1 | |
| C301, C302 | 22pF - 16V Ceramic Capacitor | SMD 0805 | 2 | |
| D201 | SMD Red LED | SMD 0805 | 1 | |
| J101 | 3.5mm - 2 Pin Fixed Terminal Block | THT | 1 | Wurth 691214110002S |
| J202 | 2.54mm - 2 Pin Single Row Pin Header | THT | 1 | |
| J301 | USB Mini Type B connector | SMD | 1 | Wuerth 65100516121 |
| BT301 | CR1220 battery holder | SMD | 1 | BC501SM |
| U101 | AMS1117-3.3 | SOT-223 | 1 | |
| U201 | STM8S001J3M | SO-8 | 1 | |
| U301 | CH340G | SOP-16 | 1 | |
| U302 | DS3231M | SOIC-16W | 1 | |
| Q201, Q202 | MMBT3904 | SOT-23 | 2 | |
| Y301 | 12.000MHz Crystal | HC49 | 1 | |
| CR1220 3V Lithium Button Cell | 1 | Battery for BT301 |