but after looking around, i saw that everyone who did this was only worried about making it work. and often resulted as a very hard to use system with only potentiometers to use as controllers. so in my attempt at this, i decided that it needs to be much more polished if it is ever to be something of use. so heres how i did it:
UPDATE! ive managed to shink it down into an entire atari themed mint tin! check it out here
Step 1: Get the stuff.
first off, we obviously need an Arduino, we are also going to need an atari joystick, a rs232 socket, a rca jack, 1Kohm resistor and a 330 ohm resistor, a switch for power, and something to cram all the guts into , i decided to use a busted digital tv receiver as my enclosure
Step 2: Hack the enclosure.
Step 3: Install the rca jack.
then we can drill a hole in the back of the enclosure for the rca jack to come through and then glue it in place.
Step 4: Wire the serial port
so using the following pinout, connect the following to the corresponding pins on the Arduino
pin1 up, to Arduino pin 7
pin2 dn, to Arduino pin 6
pin6 fire,to Arduino pin 2