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Button Pad 2x2 - LED Compatible
sku: COM-07836
Description: This is a translucent silicon rubber button pad with 4 buttons orignally inspired by the folks at monome.org. Each button has a hole underneath that accepts either a 3mm or 5mm standard LED. The idea is that you can create a button interface of your choice with the ability to display simple colors under each button. Mainly, we wanted to use our tri-color LEDs to create a full RGB color for each button.
Each button has a conductive circle backing so that a switch can be created with exposed PCB traces. Button force is between 190 and 210grams activation force (nice tactile feel like on your TV remote).
- Dimensional Drawing (2x2 section only)
- SFE Eagle Library has this part!
Pricing
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Comments
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It doesn't appear that SparkFun carries a matching PCB for this button set like it does for the other mini-buttons (COM-08998 and COM-08963).
You're technically correct in that there is no 2x2 breakout board, but you pretty much could use the Simon board for that purpose.
Or use Sparkfun's Eagle library and make your own. It takes all of 45 seconds to have a fully functional 2x2 board.
I recently made a board with the 2x2 simply because the 4x4 exceeds the size limitations of the freeware license of Eagle. That and my board was Eurocard, and I didn't want/need 16 buttons.
Simon board is only $25, you can simply change the firmware so that a pin turns on every time each button is pressed. The micro can take care of debounce as well.
The Simon board is $25.
Or get the freeware version of Eagle and design your own 2x2 board. It'd be pretty simple, as Sparkfun has a part for the 2x2 in their Eagle library that's available for free. See Sparkfun's excellent tutorial on schematic and board layout in Eagle.
Then you send the gerber files off to a PCB maker. BatchPCB works great and is cheap if you don't mind waiting a while. That'd be about $20 without shipping. And you'd still have to buy the 2x2 pad.
So all in all it's probably just easier to get the 4x4 board, unless portability is an issue. Than you're best off making a board with the 2x2 pad on it and putting everything else on it too. But that takes time, and if you just want a quick and dirty solution, hacking the 4x4 board will probably work.