Joystick Port Logic Box
Entry posted by k-Pack
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Not that many of my projects get past the prototype stage. Once I find out that something can be done I rapidly lose interest. I have found in the past that once built, the circuits rarely get used because Im working on the next project. But every so often a circuit gets soldered together and put in a project box to have on hand. Such is the case with the Joystick Logic Box.
While programing the Spinax light control circuit I wished I had the ability to quickly hook up some LEDs to the Joystick pins to view their logic state as they were changing. With the LEDs hooked up I would be able to get the program working without having to wonder if the circuit or the program is causing problems.
So, before I start my next project wishing I had this little tool at my disposal, I built one using a perforated prototype board and solder and put it in a small project box.
The electronics is nothing revelatory but I was surprised that it went into a project box measuring 1.25 X 2 X 0.5 using through hole components. It would also surprise me if someone has not done this before.
Joystick Logic Box
You may have to resize R5-R8 depending on the LED you use.
A DB9 female connector was mounted on the box to allow a joystick extension cable to connect the computer and box.
The Spinax light control program can be used to test the LEDs.
http://atariage.com/forums/blog/572/entry-11864-light-control-hardware-spinax-part-003/
They should all be on when you boot up and start blinking on pins 1, 2 and 3 when the program runs.
Now Im ready for that next project.
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