Just a standard multimeter that can check resistance and voltages. You can get one from your local radioshack for around $20. You can check the resistance of your pencil mod while the card is off and see if it is in the correct range. But you can only check the voltages while the card is on. When you check the voltages, make sure you check them very soon after turning it on. Otherwise you may be running them to high and risk burning out your card.



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