A Professional Precision Current Adapter for Multimeters.
The only low cost industry solution for multimeter burden voltage and nanoamp level current measurement.
The uCurrent™ is the only commercially available solution to the problem of burden voltage on a multimeter. See the article below to see why this little known problem can be a real big issue, even with your “precision” 0.05% Fluke multimeter. It also turns your multimeter into a powerful and precise nanoamp level measurement tool!
Thousands are in use all around the world, and it has quickly become the industry standard low cost tool for low power current measurement in modern low power microcontroller based digital electronics.
The µCurrent™ GOLD is the latest design with greatly improved specs over the original. Improvements have been made in basic accuracy, bandwidth (now you can measure fast changing “sleep” modes), current handling, and an added shorting mode to ensure uninterrupted power to your device under test while changing ranges. The µCurrent can rival 5 1/2 digit multimeters in accuracy, it is truly a precision instrument.
For increased battery life and greater potential output voltage swing, 3 x AAA batteries in series can be used instead of the coin cell. No modifications are required, just wire in parallel with the existing coin cell holder. A 3 x AAA holder fits in the existing box.
As published in the April 2009 issue of Silicon Chip Magazine.
Specifications – µCurrent™ GOLD
PLEASE NOTE: Due to need to keep the burden voltage low, overload protection is NOT INCLUDED in the design. That means NO FUSES. Care is required in using the unit to prevent overloads.
Read the FULL ARTICLE (Description, Design, How it Works, Parts List, Testing etc, as published in Silicon Chip magazine) NOTE: This is the old design.
View the SCHEMATIC
View the BOM
Download the original Gerber, Altium PCB and Schematic files HERE.
NOTE: The old model is now discontinued.
In Europe you can buy one HERE