Simple N20 Screw Driver
)
Cordless power screwdriver is not so expensive, I here to make a simple one with LED lighting in a cheaper way and is good for STEM project.
Supplies
- N20 (motor shaft ~1cm) motor (x1)
- 9V battery and cap (x1)
- microswitch (mouse) (x2)
- M2 screws and nuts (x4)
- White LED (x1)
- 330Ω resistor (x1)
- electric wires (some)
- zip tie (x1)
- copper connector for screw bits (optional)
- 3D printed parts (PLA, 20% density) : body, head (cylinder or hexagon)
Understanding the Circuit
There are plenty designs of cordless power screwdriver which using N20 motor, the circuit is simple and here I draw them for illustration.
Installing LED
The screwdriver using 2 LED for lighting, only "one" will be "ON" when pressing the switch.
The 330Ω resisitor is used for limiting the current.
Installing Screwdriver Bit
U can using a "copper connector" to connect hex bits (precision) or using the 3D printed part (provided) for commonly used hex bits
Installing Microswitches
U need to drill 4 holes for holding the microswitches and secure them by using M2 screws and nuts.
Please refer to "Step 1" for wiring and using zip tie to organize them.
Finished
Although u can use 9V battery, I usually use old one (from previous arduino projects)
Use at your own risks !
Cheers