Forum user luni couldn’t find a stepper motor library to meet his needs, so
he wrote his own. The library is able to handle up to 300,000 steps per second.
This video shows two steppers running up to 160,000 steps/sec.
There is a great write up and explanation on
luni’s GetHub Page. The page includes excellent explanations and diagrams on the three types of movements.
The library handles the three different movement modes when controlling more than one motor – Sequential Movement, Synchronous Movement, and Independent Movement.
Luni published performance metrics running 1 and 3 motors on 2 different boards.
Dimitre Lima was an artist in residence at the Red Bull Basement Festival and put together this impressive LED art installation.
Phillip Schuster built a
handy little mult-tool for working on hardware.
This neat little gadget can do things like generate PWM or DAC signals, read serial output of your microcontroller project, as well as several other useful functions. The design of the Little Helper was inspired by the iPod interface. It’s custom touch wheel allows for fast one-handed operation.
The project is open source. You can find the code on
There is some additional
discussion of the project on HackADay.
The folks over at Cirque have
put together a kit for trackpad development. This nifty little kit is Arduino based and includes everything you need to get going with trackpad development.
They have sample code, reference designs, and developer tools
available over on GitHub.
posted about his custom arcade machine over on the forum. This is a great looking cabinet and it even lights up with LEDs when not in use.
The forum post offers some more details about the build. vitormhenrique has made the
controller board public on OSH Park and is planning to make the plans and code available as well.
created The Knobber, a tiny MIDI controller with precisely one knob and one button. This compact design is pretty handy when you have limited space and you don’t need the many knobs your favorite controller offers.
Brendan’s website has a good write of the project and also offers the code he wrote.
put together this beautiful sensor box, primarily for controlling PureData, a programming language used for computer music and multimedia.
For the disks Jan hacked a couple of old hard drives for the motors and platters. The disk movement is sensed by IR LEDs and phototransistors and using quadrature encoding.
This video is a good demo of the box in action
breathed some new life into an old amp by adding a retrofitted display, a motorized volume knob, and improvements to the housing.
Years ago Travis
got his hands on an old Ford Probe Audio Amp. He got it working and improved the housing for it. Years later he re-visited the amp and did a few upgrades on it, including a motorized potentiometer for volume control, a new housing, and a new display screen. His website has a great write up on the project.