DIY Drill Controller

A small and effective DC drill machine controller which allows to control speed and direction along with providing over-current protection.

Srinivas Nistala

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Description

I was using a small MiniCraft drill machine for drilling holes into my home made PCBs and also for some cutting activity with some attachments. The problem that I had was that when I bought the drill it didn't come with any sort of controller. I used to use it with direct connection to battery.

It was difficult to every to remove the drill once it got stuck, because there was no way to reverse. So one sunday I thought of building this drill controller, which would allow me to control the direction and speed of the drill. But then I also thought of adding some over-current protection which might damage the motor driver IC (L293D).

I used an Arduino pro-mini and few other components like a POT and switches etc.

Below is the result of what I built :)

Details

You can find the demo in the video below and the schematic and code can be found on the Github link in this post. I am still working on a few glitches, feel free to modify or add any suggestions.