Power monitor
About the Power monitor PCB
Power monitor is an open source ESP32 PCB design by radioelf, published on GitHub. It is a 2-layer board measuring 92 × 63 mm, with 68 components from 32 distinct parts.
Its main chip is the ESP32-WROOM-U, from the ESP32 family. Other key parts include the H11AA1-X009T and MAX3483. By type, the board carries 32 resistors, 12 capacitors, 7 diodes, 4 microphones, 3 ICs and 3 connectors.
It belongs with the iot & wireless designs in this gallery.
From the project
Software and hardware for monitor the electrical network (MQTT, Home Assistant)
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Main components on the Power monitor
Power monitor bill of materials (BOM)
68 components, 32 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ESP32-WROOM-U | ESP32-WROOM-32U | U1 |
| 1 | H11AA1-X009T | DIP-6_W7.62mm_LongPads | U2 |
| 1 | MAX3483 | PowerIntegrations_SO-8 | U3 |
| 1 | 230V AC | TerminalBlock_bornier-3_P5.08mm | J1 |
| 1 | CT-1-5 | PhoenixContact_MCV_1,5_10-G-3.5_1x10_P3.50mm_Vertical | J2 |
| 1 | Modbus | Wago_734-133_1x03_P3.50mm_Vertical | J3 |
| 1 | 200mA | Fuseholder_TR5_Littlefuse_No560_No460 | F1 |
| 1 | 500mA | Fuseholder_TR5_Littlefuse_No560_No460 | F2 |
| 1 | TXD | Pin_D1.0mm_L10.0mm | MK1 |
| 1 | RXD | Pin_D1.0mm_L10.0mm | MK2 |
| 1 | GND | Pin_D1.0mm_L10.0mm | MK3 |
| 1 | +3.3V | Pin_D1.0mm_L10.0mm | MK4 |
| 1 | HLK-PM03 | HLK-PM01 | PS1 |
| 1 | Varistor | RV_Disc_D7mm_W3.5mm_P5mm | RV1 |
| 1 | Reset | SW_SPST_REED_CT05-XXXX-J1 | SW1 |
| 1 | Boot | SW_SPST_REED_CT05-XXXX-J1 | SW2 |
| 1 | 230V - 12V | Transformer_BV-202-0159 | TR1 |
| 6 | BAV199 | D_SOT-23_BAV199 | D1, D2, D3, D4, D5, D6 |
| 1 | STATUS | LED_0603_1608Metric | D7 |
| 1 | 100uF | CP_Elec_8x5.4 | C1 |
Show 12 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 22uF | CP_EIA-3216-12_Kemet-S | C2 |
| 4 | 100nF | C_0805_2012Metric | C3, C10, C11, C12 |
| 6 | 10uF | CP_EIA-3216-12_Kemet-S | C4, C5, C6, C7, C8, C9 |
| 7 | 1K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2, R6, R7, R8, R19, R20 |
| 5 | 47R 1% | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3, R4, R5, R17, R18 |
| 12 | 470K 1% | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R9, R10, R11, R12, R13, R14, R21, R22 +4 |
| 1 | 120K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R15 |
| 1 | 10K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R16 |
| 1 | 10K | R_0805_2012Metric | R27 |
| 3 | 100R | R_0805_2012Metric | R28, R29, R32 |
| 1 | 120R | R_0805_2012Metric | R30 |
| 1 | 330R | R_0805_2012Metric | R31 |
Power monitor design files
The KiCad project lives in the radioelf/power_monitor repository on GitHub; these links point at the commit this page was built from.
- Layoutcad/monitor_ESP32.kicad_pcb
- Schematiccad/monitor_ESP32.kicad_sch
Power monitor: common questions
What microcontroller does the Power monitor use?
The Power monitor is built around the ESP32-WROOM-U, from the ESP32 family.
How big is the Power monitor PCB?
The Power monitor measures 92 × 63 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Power monitor?
68 components, from 32 distinct parts. The full bill of materials is listed on this page.
Where can I download the Power monitor design files?
From the radioelf/power_monitor repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Power monitor design in my own project?
The repository has no license, so all rights stay with radioelf. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Power monitor without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.
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