Like many hackers, [Matthias Wandel] has a penchant for measuring the world around him, and quantifying the goings-on in his home is a bit of a hobby. And so when it came time to sense the current flowing in the wires of his house, he did what any of us would do:Â he built his own […]
USING HOMEBREW COILS TO MEASURE MAINS CURRENT, AND TAKING THE CIRCUIT BREAKER CHALLENGE Read More »
Overview This lesson describes how to control both the speed and direction of a DC motor using Pythonand a L293D chip. In Lesson 8, we used the Pi to generate pulses to control the position of a servo motor. In thislesson we use pulses to control the speed of a regular DC motor and the L293D motor controlchip to reverse the direction of the current through the motor
Adafruit’s Raspberry Pi Lesson 9. Controlling a DC Motor Read More »
Introduction Access to internet and social media has resulted in an exponential increase of digital marketing and targeted advertising. One of the ways targeted advertising is achieved is through e-mails. Most of the times, the advertisement e-mails are unsolicited and provide no useful information to the users. These are better classified as spam. E-mail spam
E-mail Spam Filtering on Raspberry Pi using Machine Learning Read More »
In the age of business Zoom rooms, having a crisp webcam is key for introducing fellow executives to your pet cat. Unfortunately, quality webcams are out of stock and building your own is out of the question. Or is it? [Dave Hunt] thought otherwise and cooked up the idea of using the Raspberry Pi’s USB
A PI USB WEBCAM THAT WAS BORN TO BOOT QUICK Read More »
[Rowan Patterson] informed us about a recent ticket he opened over at the Raspberry Pi Documentation GitHub repository. He asked about the the lack of updates to the Raspberry Pi 4’s USB-C power schematics for this board. You may recall that the USB-C power issue was covered by us back in July of 2019, yet the current official  Raspberry Pi
THE COMPROMISES OF RASPBERRY PI HARDWARE DOCUMENTATION Read More »
It’s not a stretch to say that most devices these days have settled on USB as their power source of choice. While we imagine you’ll still be running into the occasional wall wart and barrel jack for the foreseeable future, at least we’re getting closer to a unified charging and power delivery technology. But are
A CLOSE LOOK AT USB POWER Read More »
The plethora of wireless communications technologies have cut the comms wire for many applications, but these devices still require power. For home automation, this might mean a battery or mains power, but there is also an alternative that we don’t see often: Kinetic power. [Bigclivecom] bought some kinetic switches from eBay and gave it his usual reverse
REVERSE ENGINEERING SELF-POWERED WIRELESS SWITCHES Read More »
There’s plenty to love about antiques, from cars, furniture, to art. While it might be a little bit of survivorship bias, it’s easy to appreciate these older things for superior quality materials, craftsmanship, or even simplicity. They are missing out on all of our modern technology, though, so performing “restomods” on classics is a popular
ANTIQUE MAP OF PARIS WITH MODERN TECH Read More »
For American readers of a certain age, Local on the 8s likely holds a special spot in your heart. The program, once a staple of The Weather Channel, would provide viewers with a text and eventually graphical depiction of their local forecast set to some of the greatest smooth jazz ever heard outside of an elevator. In the
REVERSE ENGINEERING THE WEATHER CHANNEL’S MAGIC Read More »
Simple Pi Robot aims to put robot control in simple form. Simple Pi Robot aims to put robot control in simple form. The part list (1) Raspberry pi (Any model) but with the recent launch of pizero or pi 2 shall be a good option, my current model employs B+. (2) 40 pin GPIO cable
