This is a pretty novel idea for a camera slider, called Slidee from maker Shivam Dehinwal. It has no motors, no Bluetooth, no electronics at all and no batteries. It’s built around a regular retractable tape measure. Well, ok, a not-quite-regular retractable tape measure. It’s built specifically around the Komelon Touch Lock measuring tape because it has built-in speed control – which is important when you want to control how quickly your camera moves.
It’s very cool, using a simple 3D printed housing with some bearing wheels and a simple mechanism to hold the retraction button at different positions to adjust the retraction speed. Essentially, the button acts like a variable speed control. The harder you push it, the quicker it retracts. You will, of course, need a 3D printer – or a friend willing to make the printed components – but this is about as simple as it gets.