How to hack a vending machine?

How to hack a vending machine?
1.The latest commissioning high frequency radio frequency signal.
2.It is suitable for the machine more and stronger flash alarm prevention ability.
3.Adopt imported transistor has a strong compression capacity.
4.Using grouping hole charge, the power supply voltage can be higher,
5.Charging bore three each 15 to 20 minutes, try not to overshoot.

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