Posts with «touchpad» label

Control a Motor With a Touchpad

There are a surprising wealth of parts inside of old laptops that can be easily scavenged, but often these proprietary tidbits of electronics will need a substantial amount of work to make them useful again. Obviously things such as hard drives and memory can easily be used again, but it’s also possible to get things like screens or batteries to work with other devices with some effort. Now, there’s also a way to reuse the trackpad as well.

This build uses a PS/2 touchpad with a Synaptics chip in it, which integrates pretty smoothly with an Arduino after a few pins on the touchpad are soldered to. Most of the work is done on the touchpad’s built in chip, so once the Arduino receives the input from the touchpad it’s free to do virtually anything with it. In this case, [Kushagra] used it to operate a stepper motor in a few different implementations.

If you have this type of touchpad lying around, all of the code and schematics to make it useful again are available on the project page. An old laptop in the parts bin is sure to have a lot of uses even after you take the screen off, but don’t forget that your old beige PS/2 mouse from 1995 is sure to have some uses like this as well.

Hack a Day 11 Jun 06:00

Go Big or Go Home: A Tablecloth Touchpad

Phone screens keep getting bigger. Computer screens keep getting bigger. Why not a large trackpad to use as a mouse? [MaddyMaxey] had that thought and with a few components and some sewing skills created a trackpad in a tablecloth.

The electronics in this project are right off the shelf. A Flora board for the brains and 4 capacitive touch boards. If you haven’t seen the Flora, it is a circular-shaped Arduino made for sewing into things. The real interesting part is the construction. If you haven’t worked with conductive fabric and thread, this will be a real eye-opener. [Maddy’s] blog has a lot of information about her explorations into merging fabric and electronics and also covers things like selecting conductive thread.

As an optional feature, [MaddyMaxey] added vibration motors that provide haptic feedback to her touchpad. We were hoping for a video, but there doesn’t seem to be one. The code is just the example program for the capacitive sensor boards, although you can see in a screenshot the additions for the haptic motors.

We’ve covered the Flora before, by the way. You could also make a ridiculously large touch surface using tomography, although the resolution isn’t quite good enough for mouse purposes.


Filed under: Arduino Hacks, wearable hacks

Twine Cloud Shield puts Arduino gadgets online in seconds (video)

If you're hip-deep in Arduino projects, you're likely aware of shields: graft-on boards that add functionality, most often getting the Arduino in touch with the rest of the world. Many of these require more than a little coding skill to get the ball rolling, even in light of the Netduino, which has led Supermechanical to unveil its new Twine Cloud Shield. The board links the Arduino to a Twine WiFi sensor and gives the Arduino every internet feature the Twine can offer through just three lines of code. There's even a pair of touchpads on the shield to trigger actions through capacitive touch. Do be prepared to pony up for that ease of use when it costs $35 for the Cloud Shield alone, and $150 to bundle one with the Twine. Still, the outlay may be justified if you're more interested in quickly finishing a fun experiment than frittering your time away on the basics.

Filed under: Misc, Peripherals

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Source: Supermechanical