Big Trak Jr accessory port, basic hack
This is my very quick hack for my brand new Big Trak Jr.
The Big Trak Jr could be an awesome platform for hacking. At $24.99 +pp from thinkgeek, you can't go wrong. You could gut the on board electronics & put in an arduino or PicAxe. I think I'll keep mine stock for the time being, but maybe in the future, I'll try to parallel the electronics in it, so it can work as is, or be switched over to microcontroller control.
I've attached a few pictures of the Big Trak for show.
But, anyway, the hack itself, is fairly simple. When I pulled the top off the Big Trak Jr, I could see the accessory port appeared to be just 2 wires, Positive & negative, connected to a 3.5mm TS jack, so as a proof of concept, I plugged in an appropriate plug into the port, and connected a LED, and programmed the Big Trak to output to the accessory port.
Once I had the LED connected the right way, it lit up nicely, so I soldered the LED to the port so it would protrude from the TS jack's plastic cover, then screwed the cover into place.
Sorry, I forgot to get a photo of it fully assembled, and in use, so I will try to get some pictures, and maybe a quick video when I can.
This project was really just a proof of concept, and an excuse to post the Big Trak. I'm hoping to be able to make up some accessories of my own, a DIY rocket launcher? an electric motor? I'm not sure. we'll have to have a look & see what I can work out.