Small wood lathes don’t typically come with an RPM readout, so after obtaining such a machine several months ago, engineer Zach — also known as ‘byte sized’ — decided to build his own custom display.
The device uses a Nano for control, along with a Hall effect sensor to pick up on four magnets attached to the spinning handwheel.
RPM values are shown on a series of four 7-segment displays, and everything is enclosed in a nicely 3D-printed housing. LEDs shine through a sanded acrylic window that acts as a diffuser. Power for the lathe is still provided by a single cable, with a transformer module used to convert the AC input into 5V DC for the Arduino and other electronics.
Our dev team is grateful for the high quality contributions that the project is receiving, and is working hard to collect all the lovely feedback we have received to shape the Arduino CLI into the best tool possible for the community!
Wow! Another release just after two weeks, you ask?
Well, we fixed some serious bugs related to the compiler, and more importantly, we had to take a step back with respect to the transition to the new Java Virtual Machine from OpenJDK. Since we had received so many reports from our users, we decided to do a release with the old JVM in order to have a bit more time to properly handle those issues and at the same time guarantee a better experience to our users.
What we carry today in our pockets is nominally called a “phone,” but more often than not we’re using it to do various other computing tasks. Justine Haupt, however, wanted an actual phone that “goes as far from having a touchscreen as [she could] imagine.”
What she came up with is a rotary cellphone that’s not just a show-and-tell piece, but is intended to be her primary mobile device. It’s reasonably portable, has a removable antenna for excellent reception, a 10-increment signal meter, and, perhaps most importantly, doesn’t make her go through a bunch of menus to actually use it as a phone. Other features include number storage for those she calls most often and a curved ePaper display that naturally doesn’t use any power when revealing a fixed message.
The project was prototyped using an Arduino Micro. It was then laid out of a PCB with an an Adafruit FONA 3G board and an ATmega2560V, programmed in the Arduino IDE.
Flip displays are an interesting piece of technology, physically moving segments into place that stay put until other information is needed. Michael Klements has been especially fascinated by these devices, and after inspiration from another project, he decided to craft his own.
His version utilizes 14 micro servos to flip segments into a visible position, then rotate them to 90° when no longer needed. This “off” mode displays a slimmer profile, and the sides and back are painted black, making them much less visible.
An Arduino Mega, with 15 possible PWM outputs, is used to control the servos, while a hobby RC-style battery eliminator circuit provides power to the motors.
Be sure to check out the build process and in-action shots below!
SunVox synth software allows you to create electronic music on a wide variety of platforms. Now, with his ZT-2020 project — which resembles a miniature arcade game — YouTuber “fascinating earthbound objects” has a dedicated input scheme.
This cabinet prominently features a wide array of buttons, a directional input from a PlayStation controller, and 16 potentiometer knobs. There’s also a screen on top for video output.
Inside a Raspberry Pi runs SunVox, while most of the buttons and all of the input knobs are connected to an Arduino Mega. The Mega plays the role of MIDI controller as well, passing digital music info along to produce beautiful electronic music!