As first reported by Technabob, almost two years after he made a rather stunning Saturn V lamp, SimonRob decided to create something a bit different in the form of his Saturn V planter.
The device is based on the lower section portion of a 3D-printable rocket model, which is modified and sealed to hold dirt and water. A succulent now pops out where the rest of the rocket should be, and when combined with a 30mm thick wood plank, gives it a very unique and polished look.
A switch on the front lights up the printed flame assemblies emanating from the engines, using a trio of SMD LEDs on each exhaust. These LEDs are controlled by an Arduino Nano nestled inside the wooden base to produce random lighting effects when an activation button is pressed.
While taking photos today is normally a digital affair, there is a wealth of visual information stored on film negatives. Digitization is possible, but it tends to be rather time-intensive, so photographer/hacker Seckin Sinan Isik decided to automate the process.
His setup uses a film carrier augmented with a stepper motor and belt drive to advance the 35mm film under a tripod-mounted digital camera. This is controlled by an Arduino Nano, with the camera’s view shown via a video capture device on a nearby computer.
In one mode, the user can adjust the film position semi-manually using pushbuttons, then scan the negative. The whole process can also be automated, with a Python computer vision routine.
While this project took him over 100 hours to complete, creator Whity claims that his glowing geodesic domes were worth the effort. As seen below, each dome is able to light up its triangular faces, using via WS2812B programmable LEDs embedded inside. The effect is mesmerizing on video, and has to be even more so in person.
Each device is controlled by an Arduino Nano, along with a MPU-6050 inertial measurement unit. A series of 18650 rechargeable batteries provide power for the numerous lights involved. Magnets hold the two halves of the spheres together for easy access, and the triangles were 3D-printed with hinges to make assembly easier.
Optical media normally contains information in the form of 1s and 0s that are much too small to be seen by the human eye. This can make understanding their operation less than straightforward. To solve this problem, Jon Bumstead constructed an Arduino Nano-controlled player that uses wooden discs, with holes and solid sections large enough to clearly show what’s going on.
The discs spin under power from a DC motor, while a stationary laser/sensor pair keeps track of its rotation via repeating holes. A second laser assembly moves in and out on the disc using a stepper motor to read data, returning short messages like “don’t panic” on the LED matrix screen below.
Instead of being based on light interference like CD players, the device I built plays wooden discs with holes and “non-holes” (as I refer to them in this instructable) that either pass or block a laser beam. These holes and non-holes correspond to 1’s and 0’s in binary data that code a text message, like song lyrics or a quote. The binary information is read off the disc, stored on an Arduino, and decoded to display the text message on an LED matrix on the front of the device. As the data is being read, the LED matrix is populated to visualize the binary information. When a high bit is read, a MIDI note is also played. The music produced may sound random, but it symbolizes a series of 1’s and 0’s that actually holds meaningful information.
The wooden disc player I created can only hold about 700bits (<0.1kB) because of how large the holes are in the disc. Therefore, the messages that can be stored are short. For reference, a CD can hold around 700MB of information, which is about 10 million times more information than the wooden discs I made. The whole project helps imagine the scale of information storage on CDs (an already dated storage device) and how the digital information is read and decoded into something meaningful to humans.
If you want to build your own first-person view RC rover for some backyard exploration, this design by “MoreMorris” is a great place to start.
The tank-esque vehicle features a 3D-printed frame, including print-in-place tracks, and is able to traverse rough terrain as seen in the video below. Meanwhile, a servo-mounted FPV camera on top allows it to look left and right without swinging the body around.
Inside the vehicle, an Arduino Uno board controls its two motors with the help of an L298N driver module. User interface consists of a Nano-based remote, while communication is handled via a pair of nRF21L01 radio transceivers.
Moritz v. Sivers recently got into river surfing, which unfortunately leaves him with less time for other hobbies, like making electronics projects. The solution, of course, was to create a teched out surfboard.
His build features an array of WS2812B LEDs embedded into the sides of the board, controlled by an Arduino Nano housed in a Tupperware box strapped to the back.
The device also includes an MPU-6050 inertial measurement unit, allowing the unit to react to Sivers’ movements through the water. Left and right turns, standing, pumping the board, and surfing straight all have their own animations.
A demonstration can be seen below, along with shots of it in action at night, on the Eibach river in Munich, Germany. It looks brilliant, and like a lot of fun!