I am trying to build a feedback circuit in which a drill blade touches a conductor at either 3.3 or 5V and the newly electrified drill bit, feeds current through a carbon brush from a DC motor into an off switch that districts current between the trigger assembly and the DC torque motor driving the …

Turning off a high voltage circuit with D3, HIGH

system May 7, 2014, 3:33am 2

"Districts"= disrupts in my above comment.

I wanted to power at 3.3v so I could use nano, and I thought it doesn't take much current to turn D3, HIGH.

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