4 layers99.8 × 94.6 mm
4 layers27 × 94.5 mm
Soilmoisture
fredriknk/SoilSense- Size
- 27 × 94.5 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 21
- Nets
- 68
- Pads
- 116
- Tracks, vias
- 132, 40
- Pours
- 68
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 2 May 2023
- Updated
- 27 Sep 2024
Overview
Soilmoisture is an open-source printed circuit board by fredriknk, from the fredriknk/SoilSense repository on GitHub, published under the GPL-3.0 licence. It is a 4-layer board of 27 × 94.5 mm with 21 parts on 68 nets, routed with 132 tracks and 40 vias.
It is built around the BT840, BAT-HLD-001-TR and RC0603FR-07100KL, with the RMCF0603ZT0R00, 0603N120J500CT and ABS07-32.768KHZ-T among its other parts. Its parts include 6 capacitors, 4 resistors, 3 connectors, 2 ICs and 2 crystals.
Main components
9
BT840
LCC-LGA-40℃~+85℃ -96dBm 1.7V~5.5V 320m 4.9dBm Bluetooth 5.0 GPIO、PWM、SPI、UART、USB、I2C OTA (Over-The-Air) upgrade、Encryption function、Hardware TRNG nRF52840 LCC-LGA Bluetooth Modules ROHSFanstelBluetooth ModulesBAT-HLD-001-TR
SMT-SMDSMT-SMD Button And Strip Battery Connector ROHSTE ConnectivityButton And Strip Battery Connector
RC0603FR-07100KL
UncategorisedUnknown maker
RMCF0603ZT0R00
0603-55℃~+155℃ 0Ω 100mW 75V Thick Film Resistor 0603 Chip Resistor - Surface Mount ROHSStackpole Electronics (SEI)Chip Resistor - Surface Mount
0603N120J500CT
060312pF 50V NP0 ±5% 0603 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSWalsin TechnologyMultilayer Ceramic Capacitors MLCC - SMD/SMT
ABS07-32.768KHZ-T
SMD3215-2P-40℃~+85℃ 12.5pF 32.768kHz 70kΩ Crystal Oscillator ±20ppm SMD3215-2P Crystals ROHSAbraconCrystalsCDSU101A
0603/SOD-523FSMD-2P New Arrivals ROHSComchipUncategorised
20021121-00010C4LF
SMD,P=1.27mm1.27mm 1.27mm 10P 2 2x5P 3.05mm Black Copper alloy Gold Pin Header Surface Mount,Vertical SMD,P=1.27mm Pin Headers ROHSAmphenolPin Headers
SIT8008BC-23-18E-80.000000
SMD3225-4PSMD3225-4P Programmable Oscillators ROHSSiTimeProgrammable Oscillators
README
README.mdSOILSENSE
80 mhz MEMS oscillator Capacative soil sensor designed and routed in Kicad, the capacative probe is calculated to be between 1-70pF and uses a Festel BT840 nrf5284 system on chip zigbe bt5.0 module
TOP
BOTTOM
Source materials
The design is derived from from /u/bahildebrand/soil-moisture-pcb with an external 80mhz oscillator, added NTC tempsensor and a two prong coplanar capacative probe design.
Parts
21| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 100k 0603 1% | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R4 |
| 2 | 0R 0603 | Resistor_SMD:R_0603_1608Metric | JP1, JP2 |
| 2 | 100nF 0603 | Capacitor_SMD:C_0603_1608Metric | C3, C7 |
| 2 | 12pF 0603 | Capacitor_SMD:C_0603_1608Metric | C1, C2 |
| 2 | 4.7uf 0603 | Capacitor_SMD:C_0603_1608Metric | C4, C5 |
| 1 | 1-30pf | soil_lib:1-70pf_Soil_Probe | P1 |
| 1 | 100k NTC | Resistor_SMD:R_0603_1608Metric | TH1 |
| 1 | ABS07-32.768KHZ-T | soil_lib:XTAL320X150X90 | Y1 |
| 1 | BAT-HLD-001 | soil_lib:BAT-HLD-001 | U2 |
| 1 | BT840 | soil_lib:BT840-BT840 | U1 |
| 1 | CDSU101A | Diode_SMD:D_SOD-523 | D1 |
| 1 | Conn_01x02 0.1" | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J2 |
| 1 | Conn_ARM_JTAG_SWD_10 | Connector_PinHeader_1.27mm:PinHeader_2x05_P1.27mm_Vertical_SMD | J1 |
| 1 | SIT8008BC-23-18E-80.000000 | soil_lib:Oscillator_SMD_SeikoEpson_SG8002CE-4Pin_3.2x2.5mm | X1 |
Questions
How big is the Soilmoisture PCB?
It measures 27 × 94.5 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Soilmoisture use?
21 parts, built around the BT840, BAT-HLD-001-TR, RC0603FR-07100KL and RMCF0603ZT0R00. 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 Soilmoisture KiCad files?
From the fredriknk/SoilSense repository on GitHub, at the commit this page was made from: the board is CAD/soilmoisture.kicad_pcb and its schematic CAD/oscillator.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Soilmoisture design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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