The Simple Power Monitor for High Current Projects
Need a simple way to monitor high current power draw? The SparkFun ACS37800 Qwiic Power Meter makes it easy to measure up to 60V and 30A without cutting traces or adding complex wiring.
Whether you’re building a high-power solar array or just want to see exactly how much juice your 3D printer is pulling, getting accurate data shouldn't mean dealing with bulky, heat-generating shunt resistors. In our latest video, we’re taking a look at the SparkFun ACS37800 Qwiic Power Meter, a compact, non-invasive solution for simultaneous voltage, current, and power tracking.
This power meter was tried, tested and determined to be trusted through our rapid-prototyp wing, SparkX, and has been designed to slide seamlessly into your next Qwiic project. This board allows you to monitor voltage (up to 60VDC) and current (up to 30A) simultaneously without cutting traces or managing complex wiring.
$19.95
Isolated & Efficient Power Monitoring
Unlike traditional sensors that rely on hot, inefficient shunt resistors, the ACS37800 uses Hall-effect technology to measure current.
- Cool Operation: Because there is no shunt resistor, there is no heat generation or voltage drop, meaning the sensor itself doesn't waste the power it is trying to measure.
- Galvanic Isolation: The internal construction provides reinforced isolation between the current-carrying conductor and the sensing electronics, keeping your logic-level microcontroller safe from the high-current path.
Is This the Right Power Meter for You?
While the ACS37800 Qwiic Power Meter is excellent for heavy loads, including motor control, battery charging, solar arrays, and devices drawing less than 1 Amp, it is not suitable for low-current applications such as microcontrollers in sleep mode, single LEDs, or applications requiring milliamp-level precision. The ACS37800 has a noise floor of approximately ±0.1A RMS on its current channel.
