Tutorial written by : The Reverend Boltron

This is an activity meter for the hard drive of the XBox. It has 16 LEDS on it, with four of them constantly lit up. When there is activity, they "chase" each other, giving a "box" type effect. Where they are constantly equally spaced from each other, but rotating around the origin of the jewel. You can add more LED's to this if you want, by putting them in another parallel set .. or, if you want to just add more leds outside the four constantly lit.. like, say you want only two lit or if you want only one lit, then you can change the connection of the reset pin (15), .. like if you wanted to have 20 led's in a circle with two chasers.. you would take one of the parallel circuits away, so instead of the path being split into four, it would be split into two. and you could take away the connection from pin 1 to pin 15, and continue all the way down to pin 11 with leds coming out.. and have pin 15 and pin 8 connect, then go to ground. So just connect the pins in order that they are on the layout of the circuit for however many you want.. i.e. 8 leds to be lit up, without adding more in a parallel, pin 6 would have the last led, then you would connect pin 9 to pin 15. if you have any questions, FEND FOR YOURSELVES.. or email me at ifoundthetao@aol.com. if i am wrong about anything, please let me know.. hopefully everything is correct, but i would suggest asking someone who knows more about this type of thing on this forum.. i'm not too great at designing circuits, but this one should work.. This circuit was a Bob Bowden circuit, then jamella changed it around a little bit, then i changed it to this.. ok.. i think everyone who needs credit for this got it.. so hopefully nobody will get pissed.. ok ..

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happy modding

The Reverend Boltron

oh yeah.. incase anyone is confused about the picture that is attached to this .. the thickness of the lines determines which leds should be connected to each other.. they're all identified, and they're marked on the 4017 IC as well.. and you'll have to calculate the ohms on the resistor too, so you can choose what type of leds you want.. .. ok.. i think thats it now..