The most affordable and easy-to-use
precision DC energy analyzer.

Did you just miss out on the Kickstarter? For a limited time, preorder a Joulescope for $599, a $200 savings off the retail price of $799!

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Ships July 2019

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Joulescope measures current and voltage,
then computes power and energy.

Joulescope™ enables designers, engineers, and makers to quickly and easily optimize the energy consumption and battery life of a target device. Joulescope is designed to automatically handle wide current ranges and rapid changes in energy consumption, while allowing the target device to run normally.

Key features

Amazing dynamic range

Joulescope accurately measures electrical current over 9 orders of magnitude from amps down to nanoamps. This wide range allows accurate and precise current measurement for modern devices. Sleep modes are often just nanoamps (nA) or microamps (µA). Active modes are often milliamps (mA) or amps (A).

Low voltage drop

Most multimeters and current meters have a significant voltage drop (sometimes called burden voltage or insertion loss) which effects the actual voltage delivered to the device under test. Joulescope has a total voltage drop of 25 mV at 1 A, which keeps your target device running correctly. Joulescope's extremely fast current range switching maintains low voltage drop even under rapidly varying current demands.

Makes the invisible visible

Joulescope measures current and voltage 2 million times per second with 250 kHz bandwidth. This high sampling rate makes the power consumption of interrupt service routines, inrush currents and other short events visible.

Easy to use

Joulescope reports cumulative energy consumption along with real-time current, voltage, and power. The multimeter view clearly shows the most recent value while the oscilloscope view allows you to explore changes over time. Much simpler and more accurate than anything in its class!


The Joulescope host software is open source on GitHub. You can also swap the banana jack front panel with front panels that have other connector types! The front panels are open source on GitHub.


Joulescope is affordable and priced so that every developer on the team can have one at their desk. With such convenient access, Joulescope allows developers to see the impact of their changes on energy consumption immediately. Developers can make informed choices to account for battery life during design. Eliminate power consumption surprises during final product testing!

Why Joulescope?

Most modern electrical devices actively manage their power consumption. For example, many battery powered sensors spend most of their time in a very low powered sleep mode and only occasionally wake up to take the sensor reading and communicate the value. These devices have a high dynamic current range, and they switch rapidly between very low current consumption and very high current consumption. When “sleeping”, the devices consume nanoamps (nA) or microamps (µA), but when active, they consume milliamps (mA) or amps (A).

Measuring the total energy consumed by these devices has either required expensive equipment or a tedious, time-consuming process. Joulescope combines high-speed sampling and rapid dynamic current range switching to provide accurate and seamless energy measurements, even for devices with rapidly varying current consumption. The unprecedented accuracy and low-cost of Joulescope allows every engineer to measure the energy consumed by the target device during development and provides rapid feedback on how changes affect the overall product battery life.

Joulescope's multimeter view provides the present values for current, voltage, power and energy.

The more detailed oscillosope view provides a view of current and voltage over time. The oscillosope view allows engineers to identify and troubleshoot interrupt handlers, tasks, and other events.

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