JasonDL13 said: This reminds me of an idea I had. Since I can code in Java. Click to expand...

zhmeigen said:

View attachment 4499

Then I copied some codes of CCT to my timer app, and finally it worked well. Yes. I used an Android phone (HTC Desire-Z) to connect the stackmat, and the signal seemed very nice.Then I copied some codes of CCT to my timer app, and finally it worked well. Click to expand...

Andreaillest said: This is really neat! Also pro timer compatibility ftw. If you ever start some sort of kickstarter, I will definitely support it. Click to expand...

DanielH said: The stackmat sends out serial data. In the usb-cabel (I give my friend creed for that one, both know how to do and some soldering) there is a chip that creates a "virtual com port". It uses a standard driver witch is available on Windows/Linux/OS X. This chip is reprogrammable so my friend configured it to invert the signal. In the phone/pc you just read serial data on right baud rate. I have thoughts about to get hold of a bluetooth-unit that a can connect to the cable instead of the host-cable. With that I should be able to read the signal on all smartphone (and many "dumbphones") wireless and not be dependent on working drivers of the cables chip. Click to expand...

Yeah, there are potential applications for this outside of competitions. Anyone who wants to use the android library I created is more than welcome to ( https://github.com/jfly/fskube/tree/gh-pages/android ). Without the board, it will only work on a select few smartphones (see http://www.jflei.com/stackmat-phones/ ). For now, I want to focus on changing the way we run competitions.Yay CCT! If you still have the phone, could you record a bit of the signal and send it to me? I'll put it up on http://www.jflei.com/stackmat-phones/ so we have a record of it.Thank for the kind words. Current plan is to move forward with phones that don't need the chip, but I am looking into mass production on the side, so people can use this with any smartphone they own.Daniel, I'm so sorry for not mentioning your USB cable in my post! It honestly completely slipped my mind. The reason I wanted to go through the microphone jack is to have an option for iPhones. However, now that I'm just interested in building something for competitions, buying a bunch of cheap Android devices and connecting via USB becomes a real option, if your cable can be made for less than the cost of producing the board we made. Any idea how much it costs? Just curious, does the microcontroller in the cable need a battery, or is is powered over USB?