Hacklet 42 – Mouse Projects

Ever since [Douglas Engelbart] and his team came up with the computer mouse, hackers, makers, and engineers have been creating ways to change and improve the design. Even the original mouse was something of a hack, built form a block of wood, a button, and two encoder wheels. The wire exited toward the user’s wrist, making the device look like it had a tail. Even after all these years, folks are still working to make the perfect pointing device. This week’s Hacklet highlights some of the best mouse projects on Hackaday.io!

mouseballzWe start with [s_sudhar] and ORB – A 3D gaming mouse. Orb uses accelerometers and gyros to track its location in 3D space. The popular MPU-6050 chip provides all the sensors to create an Inertial Measurement Unit (IMU). The controller is an Arduino Micro, which provides the USB interface to a PC with the help of Arduino’s MouseKeyboard library. Two micro switches handle button duties. The original Orb was built up in a cardboard box. [S_sudhar] created a more advanced version housed in a 3D printed sphere with two buttons. The translucent joint between the two halves of the sphere is just begging for some RGB LEDs. We can already see them flashing red when you’re getting shot in Team Fortress 2!

mouse-wheelAnyone who has used X-Windows with a three button mouse knows how maddening the modern clickable center scroll wheel can be. You can’t click the wheel without it rolling, and causing all sorts of mayhem. There are plenty of software solutions and window manager mods to work around this, but [mclien] wanted a real three button mouse with a side scroll wheel. He didn’t want just any mouse though – it had to be a Silicon Graphics International (SGI) 3 button unit. His project 3-buttonmouse with seperate wheel used a dremel, drill press, and glue to transplant the electronics of a 3 button scrolling mouse into the classic SGI plastics. The final wheel placement did work – but it didn’t quite fit [mclien’s] hand. It did fit one of his friends hands perfectly though. So well in fact that the friend borrowed [mclien’s] creation. Neither the mouse nor the friend have been seen since!

jimmy[Jay-t] decided that mice are for more than pointing, so he built Jimmy the mouse bot. Jimmy is a robot built from an old Commodore Amiga two button mouse. His brain is a Parallax Propeller processor. Two outrigger mounted gear motors help Jimmy drive around. Jimmy has plenty of sensors, including infrared object detectors, switches, and a GPS module from Adafruit. Jimmy may be the world’s first homing mousebot. [Jay-t] does all his interactive testing with Tachyon Forth on the Prop. The great thing about having an 8 core processor is that there is plenty of room for expansion. Even with all these sensors, Jimmy is still only using 3 cores!



Finally we at [Clovis Fritzen] and the Wireless Batteryless Mouse. This is our favorite type of project – the kind that has just been uploaded. [Clovis] plans to use a movement based system to charge up a supercapacitor – eliminating the need for batteries or wires. He’s also hoping to use an accelerometer to detect the mouse’s position rather than a power-hungry optical system. The details are still sparse, because he’s just started the project! These are exactly the type of projects that get us thinking. How will [Clovis] translate movement to energy? Will it be weights, like a self-winding watch? Maybe pizeo elements in the buttons. Will people mind having to jiggle their mouse to get it working once that capacitor is discharged? One thing we’re sure of, [Clovis] has a proven track record of implementing projects like his weather station. Get in there and help with your own ideas, or simply follow along with us and see how this one turns out.

Not satisfied? Want more mousy goodness? Check out our freshly minted mouse and pointer projects list!

That’s about all the time we have for this week’s Hacklet. As always, see you next week. Same hack time, same hack channel, bringing you the best of Hackaday.io! 

Laser marquee projector

This laser message scroller is built with inexpensive parts. The heart of [Raul’s] system is a spinning pill-box with eight mirrors on it. Each redirects the laser to a different vertical portion of the projection surface. There are eight small arms on the apparatus that each break the beam of an optical sensors as it spins, facilitating the precise synchronization needed to generate the projected image correctly. In the video after the break we can make out what looks like an Arduino controlling the system. This makes sense as it’s easy to connect the laser pointer and sensor, and the USB connection allows for the streaming of messages to the system.

Want to see a more complicated setup? Check out the POV laser projector from a few years back. Continue reading “Laser marquee projector”

Auxiliary scoreboard reads status directly from memory

[StaticChanger] built a scoreboard to display his kill statistics from Halo for the PC. Yes, we’ve seen kill counters before, but we like the way that he gathers the data. This project is reading the score directly from an address in memory.

Using a program called Cheat Engine, the memory used by a program can be sniffed. After a few passes, the program will help you find a static memory address for your desired data. Once you have that it’s just a matter of using a pointer to that address in your desired programming language. In this case, a C# program polls the value and instructs an Arduino to display the value on a couple of 7-segment displays. Voila, the number appears next to your screen as you see in the image above.

How to use Wiimotes w/ Linux

[Sprite_tm] has whipped up yet another interesting tutorial – software-based this time. He basically describes how he connected his Wiimotes to an HTPC. A USB Bluetooth receiver, and a little bit of Linux scripting,  was all that was necessary to get the system up and running. To add to the fun, [Sprite_tm] configured a the controllers to work with MAME (an arcade machine emulator), allowing one to play Duck Hunt on a computer in its full glory!