2 layers97.5 × 79 mm
RGB LED Driver
PCB-Design-MIT/Wi-Fi-Controlled-RGB-Light
A demo board for students to learn to solder and debug
144 parts4
2 layers76.5 × 78 mm
Hardware for the emonTH3 temperature, humidity, and pulse sensing node
- Size
- 76.5 × 78 mm
- Copper layers
- 2
- Thickness
- 1.67 mm
- Parts
- 56
- Nets
- 55
- Pads
- 197
- Tracks, vias
- 294, 85
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 21 Nov 2024
- Updated
- 16 Oct 2026
Overview
EmonTH is an open-source printed circuit board by openenergymonitor, from the openenergymonitor/emonTH3 repository on GitHub, published under the CC-BY-SA-4.0 licence. It is a 2-layer board of 76.5 × 78 mm with 56 parts on 55 nets, routed with 294 tracks and 85 vias.
It is built around the ATSAML10E15A-MF, HDC2010YPAR and TPS61291DRV, with the AP2112K-3.3TRG1, LQG15HS15NJ02D and MDMK2020T3R3MM among its other parts. Its parts include 15 resistors, 9 capacitors, 6 connectors, 5 ICs and 3 diodes. It belongs with the SAM D and SAM boards of this library.
Main components
10
ATSAML10E15A-MF
VQFN-32(5x5)-40℃~+125℃ 1.62V~3.63V 10bit 12bit 25 2KB 32 Bit 32KB 32MHz 8KB ARM Cortex-M23 Built-in FLASH VQFN-32(5x5) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
HDC2010YPAR
DSBGA-6-40℃~+85℃ 0%RH~100%RH 1.62V~3.6V 11bit 550nA I2C ±0.2℃ ±2%RH DSBGA-6 Temperature and Humidity Sensor ROHSTexas InstrumentsTemperature And Humidity Sensor
TPS61291DRV
WSON-6-EP(2x2)-40℃~+85℃@(TA) 1 2.5V、3V、3.3V 5.7uA 700mA 900mV~5V Adjustable Boost Boost Built-in Yes WSON-6-EP(2x2) DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
AP2112K-3.3TRG1
SOT-25-5-40℃~+85℃@(Ta) 1 250mV@(600mA) 3.3V 50uVrms 55uA 600mA 65dB@(1kHz) 6V Fixed Over Current Protection、Thermal Shutdown、Enable control Positive SOT-25-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSDiodes IncorporatedVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
LQG15HS15NJ02D
040215nH 2.5GHz 320mΩ 450mA 8@100MHz ±5% 0402 Inductors (SMD) ROHSMurataInductors (SMD)MDMK2020T3R3MM
SMD,2x2mm1.15A 1.35A 155mΩ 3.3uH ±20% SMD,2x2mm Power Inductors ROHSTaiyo YudenPower InductorsANT-433-HETH
插件-40℃~+80℃ 1.9dBi 2 40MHz 433MHz 50Ω 8.89mm Spring antenna 插件 Antennas ROHSTE ConnectivityAntennasRS1-05-G
插件,P=2.54mm-40℃~+105℃ 1 2.54mm 250V 3A 5P 8.51mm Brass Gold Square Hole 插件,P=2.54mm Female Headers ROHSADAM TECHFemale HeadersPH1-06-UA
插件,P=2.54mm-40℃~+105℃ 1 2.54mm 250V 3A 6P Black Brass Gold Through Hole 插件,P=2.54mm Pin Headers ROHSADAM TECHPin Headers
219-2MST
SMD,P=2.54mm-55℃~+85℃ 100mA 2 2.54mm 20V Black SPST Slide, Recessed SMD,P=2.54mm DIP Switches ROHSCTS Electronic ComponentsDIP Switches
README
README.mdemonTH3
Introduction
The Energy Monitor Temperature Humidity 3 (emonTH3) is an ultra low power temperature and humidity monitoring node with support for pulse counting and additional external sensors.
It is an update to the OpenEnergyMonitor emonTH2 with the following goals:
- Increase the battery life from the current ~4 years on 2xAA
- Update to modern components
- Reduce the overall cost of the system
- Provide user expansion for other sensors
- ATSAML10E15A-MU Microprocessor
- TI HDC2010 Low-Power Humidity and Temperature Digital Sensors
- Sensirion SEK-STCC4 Co2 sensor (optional)
It should be used with the emonTH-fw firmware.
Getting started
The board is designed using KiCAD version 9. The schematic and floorplan are provided as PDF files. If you want to render your own files, run ./generate.py. This produces Gerber files as well as KiCAD PCB and schematic files tagged with the git commit for traceability.
[!NOTE] The emonTH3 will be available fully assembled and programmed from the OpenEnergyMonitor shop.
Feedback and Issues
These can be reported:
- as a GitHub issue
- on the OpenEnergyMonitor forums
Contributing
As the hardware design flow doesn't quite follow as nicely as software, if you want to contribute a change, please raise an issue as described above and we can collaborate.
After cloning the repository, run ./install-hooks.sh to add the render on commit.
References
Acknowledgements
- Glyn Hudson and Trystan Lea @ OpenEnergyMonitor
- Gordon Davidson @ OpenEnergyMonitor Forums
Parts
56| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 470K | Resistor_SMD:R_0402_1005Metric | R2, R3, R8, R10, R14, R15 |
| 5 | 100n | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C7, C9 |
| 5 | 1K | Resistor_SMD:R_0402_1005Metric | R1, R7, R9, R12, R17 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3_DIN965 | H1, H2, H3, H4 |
| 3 | 4K7 | Resistor_SMD:R_0402_1005Metric | R4, R5, R6 |
| 3 | TestPoint | TestPoint:TestPoint_Pad_D1.0mm | TP1, TP2, TP3 |
| 2 | LED | LED_SMD:LED_0603_1608Metric | D1, D3 |
| 2 | SW_Push | Button_Switch_SMD:SW_Tactile_SPST_NO_Straight_CK_PTS636Sx25SMTRLFS | SW2, SW3 |
| 1 | 100K | Resistor_SMD:R_0402_1005Metric | R11 |
| 1 | 10p | Capacitor_SMD:C_0402_1005Metric | C5 |
| 1 | 10u | Capacitor_SMD:C_0805_2012Metric | C4 |
| 1 | 15n | Inductor_SMD:L_0402_1005Metric | L2 |
| 1 | 1u | Capacitor_SMD:C_0402_1005Metric | C8 |
| 1 | 22u | Capacitor_SMD:C_0805_2012Metric | C6 |
| 1 | 3u3 | Inductor_SMD:L_Taiyo-Yuden_MD-2020 | L1 |
| 1 | AP2112K-3.3 | Package_TO_SOT_SMD:SOT-23-5 | U7 |
| 1 | ATSAML10E15A-MUT | Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.45x3.45mm | U5 |
| 1 | Antenna | ant-433:ANT-433-HETH | AE1 |
| 1 | Battery | Battery:BatteryHolder_Keystone_2468_2xAAA | BT1 |
| 1 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J3 |
| 1 | Conn_01x05 | Connector_PinSocket_2.54mm:PinSocket_1x05_P2.54mm_Vertical | J6 |
| 1 | Conn_01x06 | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J7 |
| 1 | Conn_ARM_JTAG_SWD_10 | Connector_PinHeader_1.27mm:PinHeader_2x05_P1.27mm_Vertical_SMD | J2 |
| 1 | D_Schottky | Diode_SMD:D_SOD-523 | D2 |
| 1 | FerriteBead_Small | Inductor_SMD:L_0402_1005Metric | FB1 |
| 1 | Fiducial | Fiducial:Fiducial_0.5mm_Mask1mm | FID1 |
| 1 | HDC2010 | hdc2010:DSBGA-6 | U1 |
| 1 | LOGO | graphics:starlings | G*** |
| 1 | MountingHole | MountingHole:MountingHole_2.7mm_M2.5_DIN965 | H5 |
| 1 | RFM69W | RF_Module:HOPERF_RFM69HW | U8 |
| 1 | SW_DIP_x02 | Button_Switch_SMD:SW_DIP_SPSTx02_Slide_6.7x6.64mm_W8.61mm_P2.54mm_LowProfile | SW1 |
| 1 | Screw_Terminal_01x05 | TerminalBlock_Phoenix:TerminalBlock_Phoenix_PT-1,5-5-3.5-H_1x05_P3.50mm_Horizontal | J5 |
| 1 | Screw_Terminal_01x06 | TerminalBlock_Phoenix:TerminalBlock_Phoenix_PT-1,5-6-3.5-H_1x06_P3.50mm_Horizontal | J1 |
| 1 | TPS61291 | Package_SON:WSON-6-1EP_2x2mm_P0.65mm_EP1x1.6mm | U4 |
Questions
How big is the EmonTH PCB?
It measures 76.5 × 78 mm and has 2 copper layers, 1.67 mm thick.
What parts does the EmonTH use?
56 parts, built around the ATSAML10E15A-MF, HDC2010YPAR, TPS61291DRV and AP2112K-3.3TRG1. 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 EmonTH KiCad files?
From the openenergymonitor/emonTH3 repository on GitHub, at the commit this page was made from: the board is emonTH.kicad_pcb and its schematic emonTH.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the EmonTH design in my own project?
Its repository publishes it under the CC-BY-SA-4.0 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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