Bwlr1b
About the Bwlr1b PCB
Bwlr1b is an open source PCB design by teapotlaboratories, published on GitHub under the MIT license. It is a 2-layer board measuring 38.6 × 72.1 mm, with 38 components from 22 distinct parts.
Other key parts include the BME680 and RAK3172. By type, the board carries 14 capacitors, 8 test points, 5 resistors, 3 battery holders, 2 ICs and 2 jumpers.
It belongs with the sensors, rf & radio and iot & wireless designs in this gallery.
From the project
Teapot BWLR1B: Wireless Environmental Sensor over LoRa
Teapot BWLR1B is a wireless LoRa environmental sensor capable of sensing temperature, humidity, air pressure and air quality using the on-board BME680. By using an STM32WLE MCU, the device is capable of multi-year operation before changing the batteries
Teapot BWLR1B is part of Teapot open-hardware project.
On top of their technical expertise, their customer support has been responsive, and easy to work with.
Main components on the Bwlr1b
Bwlr1b bill of materials (BOM)
38 components, 22 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | BME680 | BME680-PSON80P300X300X100-8N | U1 |
| 1 | RAK3172 | RAK3172 | U2 |
| 1 | AO3407 | SOT-23 | Q1 |
| 1 | 915MHz SMA | SMA_Amphenol_132289_EdgeMount | J3 |
| 2 | CR2450 | BatteryHolder_Keystone_3008_1x2450 | BT1, BT3 |
| 1 | 2x AA | BatteryHolder_Keystone_2462_2xAA | BT2 |
| 1 | USER0 | SolderJumper-3_P1.3mm_Bridged12_RoundedPad1.0x1.5mm_NumberLabels | JP1 |
| 1 | USER1 | SolderJumper-3_P1.3mm_Bridged12_RoundedPad1.0x1.5mm_NumberLabels | JP2 |
| 1 | RESET | SW_SPST_Omron_B3FS-100xP | SW3 |
| 1 | BOOT | SW_SPST_Omron_B3FS-100xP | SW4 |
| 1 | VCC | TestPoint_Keystone_5019_Minature | TP1 |
| 1 | TXD2 | TestPoint_Keystone_5019_Minature | TP2 |
| 1 | SWDIO | TestPoint_Keystone_5019_Minature | TP3 |
| 1 | RXD2 | TestPoint_Keystone_5019_Minature | TP4 |
| 1 | RST | TestPoint_Keystone_5019_Minature | TP5 |
| 1 | SWCLK | TestPoint_Keystone_5019_Minature | TP6 |
| 1 | GND | TestPoint_Keystone_5019_Minature | TP7 |
| 1 | RF | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP8 |
| 10 | 330uF | CP_EIA-3528-15_AVX-H_Pad1.50x2.35mm_HandSolder | C1, C2, C4, C6, C7, C8, C9, C10 +2 |
| 4 | 100nF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C3, C5, C11, C12 |
Show 2 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | 10K | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R2, R3, R6, R7 |
| 1 | 1K | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R5 |
Bwlr1b design files
The KiCad project lives in the teapotlaboratories/bwlr1b repository on GitHub; these links point at the commit this page was built from.
Bwlr1b: common questions
How big is the Bwlr1b PCB?
The Bwlr1b measures 38.6 × 72.1 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Bwlr1b?
38 components, from 22 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Bwlr1b design files?
From the teapotlaboratories/bwlr1b repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Bwlr1b design in my own project?
Yes, under the terms of its MIT license, which teapotlaboratories chose for the repository.
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