For the odd job every now and then, a regular screwdriver does the job. However, in situations like a small production operation, it can quickly become uncomfortable to use. In these situations, an electric screwdriver is incredibly useful. There’s no need to rush out to the store, however – you can build one yourself, and [Electronoobs] did just that.
The build is simple, consisting of a series of cheap modules hooked up together. An 18650 battery provides power through a boost converter to an H-bridge motor controller, which allows the DC geared motor to be driven both forwards and backwards. There’s also a USB battery charge module, that allows the screwdriver to be recharged from a standard micro USB charger. It’s all neatly packaged in a 3D printed case with a couple of tactile buttons for forward and reverse operation.
It’s a testament to the quality of modern supply chains that one can assemble a usable tool like this at home from prepackaged modules. All the parts, including the bearing and drill chuck, were sourced from eBay.
We’ve seen servos repurposed into electric screwdrivers, too. Video after the break.