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I used a penny
I tried it again with a penny from 1963 to make sure it was copper and it kina worked
i forgot about it and left it in for over 2 hours and well it is skin couloured but thier is still that black area so I will just paint it
In the procces I have destroyed 2 alligator clips used 4 batteries messed a heatsink and discolored all of my pennies
are you sure that the heatsink gives the motor power because I think your wrong no offence its not touching a power supply the tabs at the bottem of the motor well give it power
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