With the help of this DC drill speed controller circuit you can control the number of revolutions of your drilling machine. A mini-drill machine is always needed in drilling the printed circuit board.

A mini drilling machine is a device, which can be used for a lot of activities related to small-scale household building or fitting activities. You can use mini-drills for making small holes in your ...

Many types and sizes of drilling machines are used in manufacturing. They range in size from a simple bench mounted sensitive drill press to the large multiple-spindle machines able to drive many ...