4 layers90 × 21 mm
Soilsense
fredriknk/ssense
Open hardware for a Zigbee nrf52833 soil moisture probe, It is designed for using M3 stainless steel rods as probes screwed into the headers H1,H2,H3.
74 partsMIT
2 layers124.2 × 30.5 mm
LoraSensor
mjeanrichard/LoraSensor- Size
- 124.2 × 30.5 mm
- Copper layers
- 2
- Thickness
- 1.29 mm
- Parts
- 32
- Nets
- 31
- Pads
- 111
- Tracks, vias
- 246, 201
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 6 Jun 2024
- Updated
- 22 Jun 2026
Overview
LoraSensor is an open-source printed circuit board by mjeanrichard, from the mjeanrichard/LoraSensor repository on GitHub. It is a 2-layer board of 124.2 × 30.5 mm with 32 parts on 31 nets, routed with 246 tracks and 201 vias.
It is built around the SHTC3, 1N4148WS and MMBT3906. Its parts include 10 resistors, 8 capacitors, 3 ICs, 3 connectors and 2 diodes.
Main components
3
SHTC3
Digital I²C temperature / humidity sensor. Input voltage: 1.62 - 3.6 V Typical accuracy: ±2 %RH and ±0.2 °C Datasheet: https://www.sensirion.com/shtc3/SensirionUncategorised
1N4148WS
SOD-3231.25V@150mA 100V 150mA 1uA@75V 200mW 2A 4ns Independent SOD-323 Switching Diodes ROHSJiangsu Changjing Electronics Technology (CJ)Switching Diodes
MMBT3906
SOT-23-55℃~+150℃ 1 PNP 100 100nA 200mA 200mW 300MHz 300mV 40V 5V PNP SOT-23 Bipolar (BJT) ROHSTWGMCBipolar (BJT)
Parts
32| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 10k | Resistor_SMD:R_1206_3216Metric | R3, R4, R5, R7, R8, R9, R10 |
| 2 | 1N4148WS | Diode_SMD:D_SOD-323 | D1, D2 |
| 2 | 2.2u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C6 |
| 2 | 2M | Resistor_SMD:R_1206_3216Metric | R1, R2 |
| 1 | 100n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C7 |
| 1 | 10n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C8 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C4 |
| 1 | 1M | Resistor_SMD:R_1206_3216Metric | R6 |
| 1 | 1n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5 |
| 1 | 1u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2 |
| 1 | 47u | Capacitor_Tantalum_SMD:CP_EIA-3216-18_Kemet-A_Pad1.58x1.35mm_HandSolder | C3 |
| 1 | CapSense | Custom:CapSense | J4 |
| 1 | Conn_01x02_Socket | Custom:532614002 | J1 |
| 1 | HT-CT62 | RF_Module:Heltec_HT-CT62 | U3 |
| 1 | Lora | Custom:ANT-868-uSP410 | AE2 |
| 1 | MMBT3906 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | Reset | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1 |
| 1 | SHTC3 | Custom:Sensirion_DFN-4-1EP_2x2mm_P1mm_EP0.7x1.6mm | U2 |
| 1 | SW_Push | Custom:smd-tactile | SW1 |
| 1 | TPS7A2633DRVR | Custom:TI_WSON-6-1EP_2x2mm_P0.65mm_EP1x1.6mm | U1 |
| 1 | USB_B_Micro | Connector_USB:USB_Micro-B_Molex_47346-0001 | J2 |
| 1 | Upload | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP2 |
| 1 | Wifi | Custom:2450AT18A100E_JOT | AE1 |
Questions
How big is the LoraSensor PCB?
It measures 124.2 × 30.5 mm and has 2 copper layers, 1.29 mm thick.
What parts does the LoraSensor use?
32 parts, built around the SHTC3, 1N4148WS and MMBT3906. 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 LoraSensor KiCad files?
From the mjeanrichard/LoraSensor repository on GitHub, at the commit this page was made from: the board is Board/LoraSensor/LoraSensor.kicad_pcb and its schematic Board/LoraSensor/LoraSensor.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the LoraSensor design in my own project?
Its repository states no licence, so its author keeps all rights: ask mjeanrichard before reusing the design.
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