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JTAG Saver
Current Version: v1.0
Written by Xbox1Crew
Category: Developers Tools
Page Views: 4,298
Reasoning behind the design:
We wanted a simple, easy, and effective way of shutting down the jtag when it wasnt needed any longer.
Trying a 555 timer circuit, the circuit worked well, but was too expensive for people to get behind. This revision actually costs about 2 dollars USD to implement and works well, without all of the extra components that were needed for our first revision.
What will Jtag Saver do for me?
It will, in essence, allow you to safely use your jtagged xbox 360 without worry due to extra voltage or current being applied to areas that weren't meant to have them applied. This circuit will shut the jtag circuit off after 15 seconds to try and limit the damage that could be caused after long periods of use.
We developed this circuit after a few boards died soon after jtagging. It was too close together to be coincidental. Most boxes that died did so within a week of jtagging. THIS is the reason for our pursuit.
The circuit has been tested thoroughly. Many on/off cycles were gone through to make sure that it worked every single time. It did.
Optionally, you can add a resistor and LED to pin 7 to show you when pin 6 is shut off (goes high). A 220 ohm resistor should suffice, but this part is up to the end user.
Parts list:
* PIC12f629
* Octal switch cbt3244ad,112
* 2 1n4148 diodes
* 1 100 - 470 ohm resistor (for the "jumper")
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