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December 2023 Newsletter

Welcome to the final Joulescope Newsletter of 2023!  While the Joulescope team is looking forward to some relaxing holiday time, we still have some exciting announcements to fit into 2023:

• Multiple, Simultaneous Joulescope Support - New feature!

• JS220 Offset Trim Calibration - New feature!

• New JS110’s Available for Sale

• Calculate Board Runtime - YouTube video

• 2023 Wrap and 2024 Preview

• Happy Holidays!

Multiple Joulescope Support

Joulescopes are now even happier together!  The latest Joulescope UI 1.0.48 dropped Tuesday, including a long-awaited new feature: multiple, simultaneous Joulescope support.

When starting out designing an energy-efficient product, a single Joulescope is often enough to get up and running.  However, you may soon want to know how different subsystems behave, the energy efficiency of your regulators, and the changes in the subsystem you are currently developing.  Adding multiple channels using multiple Joulescopes makes these measurement challenges easier.

Many of you have tried connecting multiple Joulescopes to the same host computer.  While multiple Joulescopes worked great for Python automation, the UI “worked” in that it enumerated both Joulescopes and displayed data.  However, control and configuration were largely absent.

Joulescope UI 1.0.48 introduces full support for multiple Joulescopes.  Connect two Joulescopes to the same host computer and instantly start measuring data.

The Joulescope UI will automatically select one source device as the default.  The UI displays the default source data automatically in each widget.  You can use the Device Control widget to choose a different default source device, like this:

The Multimeter, Value, and Accumulator widgets allow you to select a different source device.  Right-click on the widget and choose the Source.

The Waveform widget can now select the source for up to four traces.  You will see the new trace selection widget when more than one Joulescope instrument is connected.

The Waveform widget’s markers and right-hand-side statistics display the selected, active trace.

Multiple device support requires instrument time synchronization.  With UI 1.0.48, time synchronization relies on the USB connection, which has variable latency.  While we did not have high expectations with this approach, we observe typical synchronization better than 100 µs with Joulescope JS220’s.

Here is one example of two JS220’s measuring the same rising edge.

Do you have the original JS110?  You can use multiple JS110’s with the new UI, too!  You can expect to see on the order of 10 milliseconds of time alignment accuracy with JS110’s.

JS220 Offset Trim Calibration

The Joulescope JS220 User’s Guide states the instrument’s lifetime specifications.  The specifications include temperature changes and aging tolerances.  Sometimes, you want to make extra effort to get even better accuracy.

With Joulescope UI 1.0.48, you can perform a manual offset trim calibration for current and voltage.  You can start an offset trim calibration from within the Device Control widget by pressing the Calibrate button:

Then follow the onscreen instructions.  This operation can significantly reduce the JS220 offset error in all current ranges with only a couple extra minutes of setup time.

New JS110’s Available for Sale!

We know that some of our customers have been looking for JS110’s to keep their measurement hardware consistent for existing projects.  We thought they were all sold out, but two of our distributors still have a few in stock!  If you are looking for a new JS110, visit:

• Adroit

• Shenzen LeaderX

Calculate Board Runtime

Video by Robert Feranec with Andrea Longobardi

Andrea has been busy using his Joulescopes to help customers build awesome products.  He recently spoke with Robert Feranec to create an excellent tutorial video that is worth checking out:

2023 Wrap and 2024 Preview

2023 has been a hectic year.  Although we launched the Joulescope JS220 at the end of 2022, we spent this year adding the JS220-specific features.  The 2023 UI developments include:

• UTC timestamps for matching recordings to other events

• JLS v2 for faster navigation, even with Terabytes (TB) of data

• Updated Waveform widget with more features & better graphics

• Full JS220 support

• Multiple simultaneous Joulescope support

• JS220 software-controlled fuse

• Automated issue reporting

• and many, many smaller improvements and fixes

We are looking forward to 2024.  With the supply chain shortages finally fading away, we can spend even more time focusing on Joulescope features and future products.

The next JS220 feature is a software-configurable current threshold for driving Trigger Out.  You can then connect the JS220’s Trigger Out to external equipment so you can signal when your device under test wakes up.

Do you have an idea or feature that would help with your measurement challenges?  Please let us know!  The best way is to start a new topic or add to an existing topic on the Joulescope forum.  If you prefer to talk privately, you can contact us.

Happy Holidays!

We hope you and your loved ones have a wonderful holiday season filled with joy and relaxation.

In observance of the holidays, the Joulescope store will be closed from December 23, 2023, through January 1, 2024.  Orders placed after 3 pm US EDT (UTC-5) on December 22 will ship on January 2, 2024.  If you need a new Joulescope to ship this year, please place your order by December 21, 2023!

Thank you for selecting Joulescopes for your measurement needs. We are thrilled and honored to help you build better, more energy-efficient products. We look forward to hearing about what you create with Joulescopes in 2024 and beyond!

Curious about whether a Joulescope is the perfect fit for your needs or have questions about its functionalities? We're here to help! Reply to this email, contact us directly, or join the conversation on the Joulescope forum!