Archive for the ‘Touchpad’ Category

Tutorial: Reading a 12-Button Keypad

Thursday, April 8th, 2010

Nice nifty tutorial (difficulty level = 1) on hooking up a 12 button keypad on your Arduino.

Most keypads like this are wired so it makes it straightforward to figure out what button is being pressed. With 3 columns and 4 rows of buttons, you only need 7 wires. Typically all the buttons in a column are connected together with the same wire, and all the buttons in a row are connected together with the same wire. To determine which button is pressed, you apply a voltage to the wire attached to a column and then check the wires attached to each row to see if current is flowing through any of them. If so, then the switch for a particular button is closed (button pressed). Then you proceed to the next column and try each row again, etc. Not rocket science — just scanning a bunch of switches to see which one is closed. In fact, there is a keypad library in the Arduino Playground that makes it easy to do this.

[Michael] from nootropicdesign.com is using a 10 wires non-standard keyboard. Check-out his code.

Via [nootropicdesign]

You got a Mail

Wednesday, March 24th, 2010

If you checked our last post, you still may want learn and compare different codes about mail receiving & notifying.

you got a mail” was Rasomuro‘s answer to this question.

via [Rasomuro]

Arduino to Nintendo DS interface

Saturday, February 6th, 2010

[Hounjini] was poking around at the Game Boy Advanced bus of his Nintendo DS lite and figured out how to use it to connect an Arduino to the DS. For testing he’s soldered an IDC plug to the cartridge cover pin interface but this only requires four connections. The Arduino can both send and receive data from the DS lite as shown in the example videos after the break. The data access is made possible by making the Arduino look like a controller that the DS is happy to talk to.

via ps2cover

Arduino + Laptop Touchpad

Tuesday, February 2nd, 2010

Yeah. It is what it seems to. Here’s the code & tutorial to hack a laptop touchpad and use it with arduino.
Clear nice pictures, thought.

thanks for the link to [electoday] user M150. the full thread at [allthemods.com] from japala user.

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