A soil pH and moisture logging module.
- Project Description
- Schematics
- PCB Design Properties and Specifications
- Board Presentation
- Bill of Materials
- Version History
- Download Project Files
- Used By
- License
This project aimed to develop a visual representation of soil moisture and pH across farmlands. We can do this by acquiring PH and Moisture data using suitable sensors. The module's location (later vision) will help establish a GPS waypoint on the farmland to help us understand which area of the farmland is being measured. GPS coordinates, soil moisture, and soil PH is collected and transmitted to a gateway.
The schematics are all on one sheet. The Sheet contains symbols and connections for a USB-C, ESP32-C3 Soc, RGB module, 2MB flash storage, terminal blocks, a buzzer, optocouplers, and 12V to 5V power converter
This image is compressed. You can download the schematics in the Project files section below if you struggle with seeing certain details. Thanks!!
| Category | Description |
|---|---|
| Board Thickness | 1.6178 |
| Dimension | 80mm x 50mm |
| Number of Layers | 4 |
| Soldermask | Black |
| Silkscreen | White |
| Mounting Holes | 4 |
| Edge Fillet size | 6mm |
| Impedance Profile (Antenna) | 50 |
| Impedance Profile (USB) | 90 |
| Minimum Hole Size | 0.2mm |
| Maximum Hole Size | 7.62mm |
Below is the board in different views. To see areas of the board not shown below, please visit the Altium 365 project link.
| S/N | Name | Description | Designator | Revision Status | Quantity | Manufacturer | Manufacturer Part Number | Supplier | Unit Price |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Antenna | Antenna module | AE1 | Up to date | 1 | Murata | GRM1885C1H100JA01D | Mouser | 0.1 |
| 2 | GRM1885C1H100JA01D | Capacitor, 0.10uF, 6.3V | C1, C2 | Up to date | 2 | Murata | GRM1885C1H100JA01D | Mouser | 0.1 |
| 3 | GRM033R60J104KE19D | Capacitor, 10uF, 6.3V | C3, C4, C5, C6, C15 | Up to date | 5 | Murata | GRM033R60J104KE19D | Newark | 0.008 |
| 4 | GRM188R60J106ME47D | Capacitor, 10uF, 6.3V | C7, C9, C16 | Up to date | 3 | Murata | GRM188R60J106ME47D | Newark | 0.065 |
| 5 | C0805C226M9PACTU | Capacitor, 22uF, 6.3V | C10, C11 | Up to date | 2 | KEMET | C0805C226M9PACTU | Digikey | 0.21 |
| 6 | GRM188R71A225KE15D | Capacitor, 2.2uF, 10V | C12, C13 | Up to date | 2 | Murata | GRM188R71A225KE15D | Digikey | 0.17 |
| 7 | GJM1555C1H3R3CB01D | Capacitor, 3.3pF | C18, C19 | Up to date | 2 | Murata | GJM1555C1H3R3CB01D | Digikey | 0.1 |
| 8 | PMEG6020AELRX | Schottky Diode, 60V | D2 | Up to date | 1 | Nexperia | PMEG6020AELRX | Newark | 0.115 |
| 9 | 16V Resetable Fuse | Resettable Fuse | F1 | Up to date | 1 | Murata | BLM18PG121SN1D | Digikey | 0.1 |
| 10 | W25Q16JVUXIQ | Flash memory, 16Mb | IC1 | Up to date | 1 | Winbond | W25Q16JVUXIQ | Digikey | 0.45 |
| 11 | TYPE-C-31-M-12 | USB Connector | IC2 | Up to date | 1 | STMicroelectronics | USBLC6-2SC6 | Mouser | 0.36 |
| 12 | USBLC6-2SC6 | Integrated Circuit | IC3 | Up to date | 1 | STMicroelectronics | USBLC6-2SC6 | Mouser | 0.36 |
| 13 | AMS1117-3.3 | Voltage Regulator | IC4 | Up to date | 1 | AMS | AMS1117-3.3 | Digikey | 0.12 |
| 14 | LQW18AN2N2C80D | Inductor, 2.2nH | L2 | Up to date | 1 | Murata | LQW18AN2N2C80D | Mouser | 0.18 |
| 15 | 150060VS75000 | LED Indicator | LED1 | Out of date | 1 | Wurth Electronics | 150060VS75000 | Digikey | 0.15 |
| 16 | PS1720P02 | Piezo Transducer | LS1 | Up to date | 1 | TDK | PS1720P02 | Arrow | 0.0551 |
| 17 | 691322110002 | Header pins | P1-P7 | Up to date | 7 | Wurth Electronics | 691322110002 | Digikey | 0.44 |
| 18 | 691305140004 | Connector | P8 | Up to date | 1 | Wurth Electronics | 691305140004 | Digikey | 1.2 |
| 19 | KSC1815YTA | Transistor | Q1 | Up to date | 1 | Fairchild | KSC1815YTA | Digikey | 0.05 |
| 20 | HCPL-181-00CE | Optocoupler | Q2, Q3 | Up to date | 2 | Broadcom Avago | HCPL-181-00CE | Mouser | 0.76 |
| 21 | RT0603FRE075K1L | Resistor, 5.1K OHM | R1, R4, R5 | Up to date | 3 | Yageo | RT0603FRE075K1L | Digikey | 0.018 |
| 22 | RC0402JR-07220RL | Resistor, 220 OHM | R2 | Up to date | 1 | Yageo | RC0402JR-07220RL | Newark | 0.045 |
| 23 | ERJ-2RKF1001X | Resistor, 1K OHM | R6, R8 | Up to date | 2 | Panasonic | ERJ-2RKF1001X | Newark | 0.004 |
| 24 | ERJ-3EKF1650V | Resistor, 1.65K OHM | R7, R9 | Up to date | 2 | Panasonic | ERJ-3EKF1650V | Newark | 0.006 |
| 25 | CRCW1206220RFKEA | Resistor, 220 OHM | R11, R12 | Up to date | 2 | Vishay | CRCW1206220RFKEA | Digikey | 0.1 |
| 26 | ERJ1GNF4700C | Resistor, 470 OHM | R13, R14 | Up to date | 2 | Yageo | RC0201FR-07470RL | Newark | 0.005 |
| 27 | B3F-1000 | Tactile Switch | SW1 | Up to date | 1 | Omron | B3F-1000 | Newark | 0.199 |
| 28 | ESP32C3 | WiFi/BLE Module | U1 | Up to date | 1 | Adafruit Industries | 1655 | Arrow | 2.89 |
| 29 | 1655 | Integrated LED | U2 | Up to date | 1 | Adafruit Industries | 1655 | Arrow | 2.89 |
| 30 | ABM8-40.000MHZ-10-1-U-T | Crystal, 40MHz | Y1 | Up to date | 1 | Abracon | ABM8-40.000MHZ-10-1-U-T | Digikey | 0.43 |
| 31 | ABM8-40.000MHZ-10-1-U-T | Crystal, 40MHz | Y2 | Up to date | 1 | Abracon | ABM8-40.000MHZ-10-1-U-T | Digikey | 0.43 |
https://oreofeoluwa-ayoola.365.altium.com/designs/28BCF5DB-3B28-4A5B-AA95-F2BDC21DAB44This software is licensed under the MIT