Energy monitoring breakout board for Arduino, Raspberry Pi and other maker-friendly microcontrollersDesigned by Upbeat Labs in United States of America
I am delighted to announce that 15A conversion for Dr. Wattson is now available! Check the Dr. Wattson product page for more details! :-)
Dr. Wattson Energy Monitoring Breakout Board for Arduino, Raspberry Pi and other Maker-Friendly Microcontrollers. Easily integrate quality AC energy measurements into your next project! What is it?...Read More…
Energy Monitoring Breakout Board for Arduino, Raspberry Pi and other Maker-Friendly Microcontrollers. Easily integrate quality AC energy measurements into your next project!
Dr. Wattson is a new energy monitoring breakout board from Upbeat Labs.
Based on the MCP39F521, a single-phase power monitoring chip from Microchip, it is coupled with rich Arduino and Python libraries (for boards like Raspberry Pi and BeagleBoards) to facilitate energy monitoring without much ado. The board is designed to be tolerant of a wide range of voltages, which means that it can also be used with the Raspberry Pi or any other 3.3v MCUs just as easily.
Dr. Wattson makes Professional-Quality energy monitoring and measurement available to the Maker, catering to both the novice and advanced user! The unit comes pre-calibrated, enabling measurements from 1mA up to 4A, to enable you to start taking quality measurements on the get-go with just a couple of simple commands.
If you want to measure higher current, do not fear! It also has a 15A conversion capability - change the burden resistors on the board to 20 ohms each and apply the new calibration settings we provide using the library to increase your measurement range to 15A! (with reduced sensitivity at the lowest readings) Or alternately, if you would rather not deal with the nitty gritty of the conversion, we can do the conversion for you for a nominal fee!
If you are a more advanced user, you have a wide range of functionality available from the rich library, as well as the ability to tweak the hardware to suit your needs and recalibrate using the library.
Whether you want to measure small standby power consumption or larger loads, Dr. Wattson has you covered. Boasting a 4000:1 Dynamic Range, and capable of 0.1% accuracy, the MCP39F521 is a versatile chip, allowing you great flexibility with measurements. Dr. Wattson takes that flexibility and makes it easy to use! Dr. Wattson comes calibrated to measure currents from 1mA up to 4A. [Now with a 15A conversion capability - change the burden resistors on the board to 20 ohms each and apply the new calibration settings we provide using the library to increase your measurement range to 15A! (with reduced sensitivity at the lowest readings) Or alternately, if you would rather not deal with the nitty gritty of the conversion, we can do the conversion for you for a nominal fee!]
A comprehensive, yet easy-to-use Arduino library means you can integrate this into your application and jump right away into making measurements and other functionality.
A comprehensive, yet easy-to-use Python library using smbus2 means you can now easily use Dr. Wattson with Raspberry Pi (or BeagleBone Black) and integrate it into your next project.
There are quite a few code samples to get you started as well as give you some inspiration. You have code samples to show basic usage, like
and more advanced examples such as
Environmentally friendly and high-quality ENIG finish (lead free) with lead-free solder with 2 oz copper and wide high-voltage-traces and quality components are rated to 12A or more!
(traces 10A @ 10˚C rise, 15A @ 25˚C rise, with the terminal connectors rated for 300V, 12A)
Since it is an isolated design, you can bypass the board completely for high current, bypassing the high current neutral line through the CT core and bypassing the board altogether. (You will still need to connect AC line and neutral IN for enabling voltage measurements via the voltage transformer)
It includes 4 mounting holes (2-56) to enable you to put it into a safe enclosure.
Solder jumpers on the board enable you to pick from 4 possible I2C addressing schemes, allowing you to control 4 of these boards from a single MCU using the same I2C bus.
Use the Zero Cross Detector (ZCD) output to orchestrate any synchronization like firing a Triac for dimming, or making a clock based on your AC line frequency!
The event pin gives you output indication on the presence of configured events of interest, like voltage surge/sag, over-current, over-power.
Configure the events of interest via the Arduino/Python library, and get notifications by connecting these pins to any externally interruptible pin in your MCU. Using the library, you can then query the board to find out which event occurred.
While the board is powered by 3.3v, it includes a Vin pin (set it to your MCU voltage) and bi-directional level shifting on all IO pins, so you can use a 5v system or a 3.3v system without any modifications or need for level shifting.
You are purchasing the Dr. Wattson Energy Monitoring Board. In addition, you will need the following:
I worked on a Smart Outlet project called BuffI the Ampere Slayer (see my presentation from Maker Faire 2017 in San Mateo, CA - https://youtu.be/LzQakUzzlg4), and part of the work that was done there was to enable quality energy monitoring, including the ability to measure small standby power consumption. I thought that a well-calibrated breakout board to make quality energy monitoring as a subcomponent available to the Maker community would be very useful, and so I decided to create Dr. Wattson and put in all the features that I wanted to see, as a Maker myself.
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Raymond | Aug. 16, 2018
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