If you live in a house with stairs and have to traipse up and down at night, it’s best to have some sort of light that guides you. Although a cell phone can work just fine, or you could likely activate bright overhead lighting, creator MagicManu devised an automatic and progressive solution to illuminate his path instead.
MagicManu’s system knows when someone is there using PIR sensors arranged at both ends, and only activates if it’s dark enough thanks to a photoresistor. The entire setup is controlled by an Arduino Nano, while two potentiometers adjust light sensitivity and duration of ignition.
As MagicManu walks up, a rainbow pattern emanates from the bottom to the top via addressable WS2812B LEDs, or vice versa if he’s descending.
If you’ve ever wanted to wind balls of yarn, then look no further than this automated machine from Mr Innovative. The YouTuber’s DIY device is powered by an Arduino Nano and an A4988 stepper driver, spinning up a round conglomeration of yarn via a NEMA17 motor and a timing belt.
The ball is wound on an offset spindle, which is mechanically controlled to pitch back and forth and spin itself as the overall assembly rotates, producing an interesting geometric pattern.
User interface consists of a potentiometer and 16×2 I2C LCD display, allowing Mr Innovative to set the winding speed as a percentage. As seen in the video below, it’s able to “spool up” at an impressive rate, potentially creating lots and lots of balls o’ yarn as needed!
‘Raspberry and chips,’ not something you’d like to eat but in the world of silicon it’s actually a great combination. Eben Upton recently shared with us Raspberry Pi’s exciting vision for a revolutionary product that they were working on: a microcontroller, the RP2040, based on Raspberry Pi silicon.
The news was both disruptive and exciting at the same time. At Arduino, we love to put our hands on innovative technologies, micros, sensors and all the building blocks that allow us to fulfill our mission of making technology simple to use for everyone. The curiosity was growing and a few weeks later we were already tinkering with the initial development tools. The processor is a very intriguing beast — it’s a dual-core Cortex-M0+ microcontroller with fairly sophisticated architecture.
Since we have been experimenting quite a bit with multi-core processors with our Pro product, the “Portenta,” we decided to build an Arduino board based on this new silicon.
We started from the Nano format with its own tiny footprint, leveraging on some of the existing key features of other Nanos like the versatile u-blox NINA WiFi and Bluetooth module. The goal being to enable people to develop connected products leveraging our hardware powered by Raspberry silicon, a solid radio module with exceptional performance, and the Arduino Create IoT Cloud.
The new board will come packed with some high-quality MEMS sensors from STM (namely a 9-axis IMU and a microphone), a very efficient power section, and a bunch of other innovations that you can already spot from the design.
Whereas the majority of microcontrollers use embedded flash, the new RP2040 chip uses external flash. To provide plenty of space for all your code and storage we’ve included 16MB flash memory — this is also particularly useful to allow OTA (over-the-air) updates.
But there’s more! We are going to port the Arduino core to this new architecture in order to enable everyone to use the RP2040 chip with the Arduino ecosystem (IDE, command line tool, and thousands of libraries). Although the RP2040 chip is fresh from the plant, our team is already working on the porting effort… stay tuned.
While we consider what other products to develop to leverage the RP2040 architecture, we’d love to hear what you’d like us to build with this exciting new processor.
Join us in welcoming the new Raspberry Pi RP2040 and the newborn Arduino Nano RP2040 Connect, which will be available for pre-order in the next few weeks!
– Massimo Banzi (co-founder & chairman) and Fabio Violante (CEO)
The Coanda effect, as you may or may not know, is what causes flowing air to follow a convex surface. In his latest video, James Bruton shows how the concept can used as a sort of inverted ping pong ball waterfall or staircase.
His 3D-printed rig pushes balls up from one fan stage to another, employing curved ducts to guide the lightweight orbs on their journey.
The fan speeds are regulated with an Arduino Uno and motor driver, and the Arduino also dictates how fast a feeder mechanism inputs balls via a second driver module. While the setup doesn’t work every time, it’s still an interesting demonstration of this natural phenomenon, and could likely be perfected with a bit more tinkering.
As shown in the video below, the first step was to get it physically set up, modding an old metal bed frame into a support structure. He then added a recessed NPN capacitive sensor to pick up when the bag hits the back of the platform.
The sensor sends “hit” signals to an Arduino Uno via a PC817 optocoupler. The board then counts punches and displays the number of hits on an LCD screen mounted just above eye level.
Whether it’s competing with friends or simply improving your boxing skills, DuctTapeMechanic’s system looks like a fun one to build yourself!
The device is controlled by an Arduino Uno, along with a pair of motor drivers implemented handle the device’s high current needs. An MPU-6050 allows it to react as the rider leans forward and backwards, moving with the help of a PID loop. Steering is accomplished via a potentiometer, linked to a bent-pipe control stick using a bottle cap and glue.
Impressively, the only things purchased for the build were the motor controllers, as the rest of it was hacked together with available parts. As seen in the video below, it looks like a fun conveyance, though they were certainly wise to wear helmets while testing!