Open Hardware: Raspberry Pi, Arduino, and more
-
Creating mesmerising kinetic art furniture with Sisyphus
In a list of things I thought I’d ever read about alongside Raspberry Pi, “coffee tables” and “sand” were not near the top. Sisyphus started life as an art installation for museums, but Raspberry Pi has allowed the company behind this mesmerising creation to scale up and offer you “museum-quality kinetic sculpture” for your own living room. They’re named “Sisyphus”, of course, because they never finish pushing the ball bearing across the sand, leaving patterns behind it.
-
power_dist r4.5b
The changes are largely the same as for the new pi3hat: [...]
-
Build your own tachometer with an IR sensor and an Arduino
This infrared sensor module works by emitting infrared light from an LED and monitoring the reflection. When one of the wheel’s spokes passes in front of the sensor, the reflection becomes strong and easy to detect. An Arduino Nano board measures the time between those events and multiplies the result by the number of spokes to determine the total time for a complete revolution. Divide 60 by that number and you get the RPM. The Arduino continuously calculates that value and displays the number on a small OLED screen. Power comes from a 9V battery.
-
An Arduino Leonardo-powered, 3D-printed robotic arm designed from scratch
The premise of the arm project was to utilize a total of five servo motors for manipulating each degree of freedom, as well as an Arduino Leonardo and a PCA9685 driver for controlling them. Once the components had been selected, Build Some Stuff then moved onto the next step of creating 3D models of each of the robot arm’s joints in Fusion 360 before 3D printing them. He also made a scaled-down version of the larger arm assembly and replaced the servo motors with potentiometers, therefore allowing him to translate the model’s position into degrees for the motors.