Arduino Shield / Feather Wing Current/Voltage/Power Monitor with high and low current option.Designed by Pier 42 in Canada
What is it? The Watt-A-Live is a versatile embedded power monitor based on the Texas Instruments INA209 with full connectivity to the unit under test. It measures the load current through a shunt r...Read More…
The Watt-A-Live is a versatile embedded power monitor based on the Texas Instruments INA209 with full connectivity to the unit under test. It measures the load current through a shunt resistor and has separate GND connections to the power supply and the load to make it a true power monitor. It is designed as an Adafruit Feather Wing and Arduino Shield. The Arduino Shield needs 2 wire mods to give full functionality. If you would like to get more details, please contact me.
Alternatively it can be used as a breakout board with any other controller that has I2C and optional GPIO connectivity. 2 jumpers can select between 2 different shunts to measure different current ranges. The board is populated with a 0.10 Ohm shunt to measure 3.2A to 100µA. Optionally a 500 Ohm shunt can be added for a current range of 640uA to 20nA. Maximum bus voltage is 26V.
Full feature set:
A pair of barrel jack connectors (1 male, 1 female) and a pair of banana jacks can be added for additional functionality.
I wanted to provide a holistic solution for embedded power monitoring.
It enables a wider variety of features compared to the standard INA219 solutions with 2 screw terminals. Most importantly it has 2 dedicated screw terminals for GND connection to measure the bus voltage and power. No need to solder the GND wire somewhere to the breakout board. It also has 16 selectable slave addresses, so multiple units can be used at the same time. And it has additional signalling pins for alerts and warnings. It can be used as Feather Wing, Arduino Shield, as breakout board or on a breadboard.
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