Skip navigation
Introduction This short blog post documents a simple project to measure current in devices that may have low power operation for periods, but possibly have periods of high current draw. I recently needed to monitor the current of a few wireless devices, and I wanted a way to measure up to an amp or so, but to also be able to resolve tens of microamps in the same range. This is a simple project that can be constructed in half an hour, so there’s not a lot of text to read!     W ...
I have a ST Micro Nucleo board with a low power microcontroller. The STM32F030R8 I'm going to measure its power consumption, to see how well it would do in low power designs. ST has a good power measurement example; called PWR_CurrentConsumption. It allows to measure power in SLEEP, STOP and STANDBY mode. This blog shows the power in the different modes.   Probe Point  The Nucleo 64 boards have a jumper called IDD. It's in the direct current path to the controller. You can replac ...
Mutekimaru has already logged over 780 hours of Pokemon Ruby. (Image Credit: Mutekimaure Channel)   I’ve been a huge fan of fish ever since my “Project Goldie" internet controlled fishtank build here on element14. This is a pretty fun way of interfacing your fish to the world.   Who says fish can’t do anything other than swim around? A fish in Japan named Mutekimaur (aka Maurice) is playing the Pokemon Ruby video game. The fish’s progress is being tracked o ...
This image shows a monolayer WSe2 housing "composite fermions," a quasi-particle created from the interaction between electrons. It's also responsible for the sequence of fractional quantum Hall states. (Image Credit: Cory Dean/Columbia University) Researchers from Columbia University successfully examined a quantum fluid called the fractional quantum Hall states (FQHS) in a monolayer 2D semiconductor. The team's discovery shows the high intrinsic quality of 2D semiconductors and establishes t ...
This real world example shows how to trigger a RIGOL DS1054Z oscilloscope at a specific point in an i2c communication, and then check signal + data. The DS1054Z comes with i2c functionality. In the past they were options you bought separately. Since 2019 they are standard.     Test Setup and Hooking up the Oscilloscope  Any i2c setup will do. Just pick whatever design you have that uses the protocol. I used a very simple design: An Arduino UNO talking to an RGB + ir sensor fr ...
The very first video call took place fifty years ago, which involved using the Picturephone Mod II device. (Image Credit: Chris Harrison/Carnegie Mellon University)   Fifty years ago, the first-ever video call took place using AT&T’s Picturephone Mod II between Peter Flaherty, then-Pittsburgh Mayor, and John Harper, former chairman of Alcoa. This was the first video phone that could be installed in your home or office, and when AT&T’s network went live on July 1, 1970, ...
A new prototype from UCLA can translate sign language using a smartphone with 98.63% accuracy. Unlike previous devices, this one is lightweight and inexpensive. (Image credit:  UCLA)   American Sign Language (ASL) is a difficult language to learn, but a new glove by UCLA could make things easier. Researchers have developed an inexpensive glove that translates sign language into written and spoken words on a smartphone.   The prototype is made up of a pair of gloves with thin, s ...

Filter Blog

By date: By tag: