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Descrição
3D printed electric screwdriver
Gear ratio 25:1
Just enough torque for smartphones and such with more speed than an average commercial screwdriver of similar type.
It requires:
.Powerful type 130 dc motor (peak current of mine at 4 volts is about 3 Amps) (Also as it turns out stock brushes of this motors last for about a week) I upgraded mine with graphite brushes i took from another motor. Yet to find out how long that would last.
. 18650 lithium-ion cell . Lithium cell protection board . Couple of buttons . H bridge motor controller (i used TA6586) . Micro USB . Some litium battery charging chip
