ET-P15
INA226 Power Monitor 36 V
16-bit current, voltage and power monitor, ±5 A, Qwiic
AED 29.00
Out of stockOverview
16-bit current, voltage and power monitor, ±5 A, Qwiic
The ET-P15 is built around the TI INA226 — 16-bit, 0–36V bus, ±81.92mV shunt range, 0.1% gain error, averaging. It talks over I2C 0x40 (A0/A1 = GND) and runs from VIN 3.3–5.5V from Qwiic.
Two Qwiic / STEMMA QT connectors let you chain it with other boards without soldering, and the 2.54 mm header fits a breadboard.
Designed in Dubai by ElectroTrical — the full schematic, BOM and design notes are published below.
Good for
- Solar and battery monitoring
- Measuring motor or LED current
- Power logging for IoT
Key features
What makes it different
IC
TI INA226: 16-bit, 0–36V bus, ±81.92mV shunt range, 0.1% gain error, averaging
Range
15mΩ shunt → ±5.4A, 2.5µV/LSB = 0.17mA
Interface
I2C 0x40 (A0/A1 = GND)
Supply
VIN 3.3–5.5V from Qwiic
Qwiic / STEMMA QT
Two JST-SH connectors plus a 2.54 mm header — 3.3 V and 5 V hosts.
Open documentation
Schematic, BOM and layout notes published for every board.
Specifications
Technical specifications
| IC | TI INA226: 16-bit, 0–36V bus, ±81.92mV shunt range, 0.1% gain error, averaging |
|---|---|
| Range | 15mΩ shunt → ±5.4A, 2.5µV/LSB = 0.17mA |
| Interface | I2C 0x40 (A0/A1 = GND) |
| Supply | VIN 3.3–5.5V from Qwiic |
| Size | 25.4 × 25.4 mm |
|---|---|
| Mounting | 4 × M2.5 holes, 2.54 mm from each corner |
| Connectors | 2 × Qwiic / STEMMA QT (JST SH 4-pin) · 5-pin 2.54 mm header · Screw terminal 2P 5.0mm 17A (THT) — Supply + in / load + out |
| Main IC | INA226AIDGSR (LCSC C49851) |
| Revision | Rev A |
| Libraries | RobTillaart INA226, ESPHome ina226, Linux hwmon ina2xx |
|---|
| JP1 (default Closed) | Cut to turn off the LED |
|---|---|
| JP2 (default Closed) | Cut to remove the host-side I2C pull-ups |
Performance
Resolution
Pinout
Pin map and connections
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VIN | Power | Sensor supply = host logic level |
| 2 | GND | Ground | Ground |
| 3 | SCL | I²C | I²C clock |
| 4 | SDA | I²C | I²C data |
| 5 | ALERT | Output | Open-drain alert, active low |
Qwiic / STEMMA QT pins: GND, VIN, SDA, SCL (same on both connectors). I²C pull-ups (10 kΩ) are on the board; cut JP2 to remove them.
Mechanical
Dimensions and what's in the box
In the box
- 1 × ET-P15 INA226 Power Monitor 36 V (assembled)
- 1 × 5-pin 2.54 mm male header, unsoldered
Getting started
- Plug in a Qwiic / STEMMA QT cable, or solder the header and wire VIN, GND, SDA and SCL
- Libraries: RobTillaart INA226, ESPHome
ina226, Linux hwmon ina2xx - Run an I²C scanner to confirm the address: 0x40
Compare
Which power monitor?
| INA226 Power Monitor 36 V (this board)This board | ET-S51 INA219 Current & Power Monitor | ET-S07 INA228 85 V Power Monitor | |
|---|---|---|---|
| What it does | 16-bit current, voltage and power monitor, ±5 A, Qwiic | Measure voltage, current and power up to 26 V / 3.2 A, Qwiic | 20-bit current, voltage, power and energy monitor |
| Interface | I²C 0x40 (A0/A1 = GND) | I²C 0x40 (4 addresses); Qwiic / STEMMA QT | I²C 0x40 default; 0x41/0x44/0x45 via JP3/JP4 (16… |
| Best for | Solar and battery monitoring | Battery and solar monitoring | Battery and solar monitoring |
| Price | 29 AED | 29 AED | 59 AED |
Downloads
Documents and design files
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