## NEW PRODUCT! EEVblog uCurrent – Precision nA Current Measurement Assistant

NEW PRODUCT! EEVblog uCurrent – Precision nA Current Measurement Assistant – v3

An essential companion when working on a ultra-low-power projects! If you’ve ever used a portable multimeter (even your \$300 Fluke!) to measure sub-uA currents – say for a low power microcontroller or sensor project – you may notice that you’re not getting the precision you expect, or that your project is acting finicky.

How is this possible? – It’s called Burden Voltage. Many people are aware of Burden Voltage, but few people are aware of how bad this effect can be in practical circuit current measurements with a multimeter. Don’t believe it?, take this simple test with your multimeter:

• Try to measure 190mA on the 200mA current range (pretty simple huh?)
• Read your manual to find out your meters “burden voltage” (I bet you don’t know it off the top of your head) (e.g. a Fluke 87V is 1.8mV/mA)
• Do the simple math to see what voltage your meter is dropping (e.g. 190(mA) * 1.8mV = 0.342V
• Now calculate what effect this drop has on your circuit at 5V, 3.3V, or something like today’s modern devices that need 1.2V supplies.

Is your 1.2V circuit going to work the same at 0.86V?, or your 3.3V circuit at 2.96V?, or even your 5V circuit at 4.66V? That’s what a high-end Fluke 87V meter will do to your measurement!, and that’s a GOOD meter. Even if your circuit “works”, what will that change in voltage do to your current consumption?

The solution? Use a precision op-amp circuit designed specifically for measuring ultra-low currents. That’s what the uCurrent is! Keep it handy for when you need to tackle those low-power projects.

Each order comes with a pre-built and tested Rev 3 uCurrent adapter. Australian Made ABS box. Fully assembled and tested in Australia. PCB is made in New Zealand by CircuitLabs. No test leads are supplied, you have to supply your own for your own purpose.

Adafruit publishes a wide range of writing and video content, including interviews and reporting on the maker market and the wider technology world. Our standards page is intended as a guide to best practices that Adafruit uses, as well as an outline of the ethical standards Adafruit aspires to. While Adafruit is not an independent journalistic institution, Adafruit strives to be a fair, informative, and positive voice within the community – check it out here: adafruit.com/editorialstandards

Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.

Join over 36,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

CircuitPython – The easiest way to program microcontrollers – CircuitPython.org

Maker Business — “Packaging” chips in the US

Wearables — Enclosures help fight body humidity in costumes

Electronics — Transformers: More than meets the eye!

Python for Microcontrollers — Python on Microcontrollers Newsletter: Silicon Labs introduces CircuitPython support, and more! #CircuitPython #Python #micropython @ThePSF @Raspberry_Pi

Adafruit IoT Monthly — Guardian Robot, Weather-wise Umbrella Stand, and more!

Microsoft MakeCode — MakeCode Thank You!

EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey

New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — #NewProds 7/19/23 Feat. Adafruit Matrix Portal S3 CircuitPython Powered Internet Display!