Usually, when you want a servo motor, you simply buy one already made. But if you need something unusual, you can turn any DC motor into a custom servo you can control just like [Dejan] did.

But if you’re going to really go far you’ll also need to get good at electronics, which was part of the reason behind this Arduino servo tester. [Peter Pokojny] decided to take the plunge ...

ECM's new servo motor delivers 18.8Nm of torque from just 0.57kg-achieving an exceptional torque-to-weight ratio in an ultra-compact footprint. ECM's ‘Eight Ball' integrates a PrintStator ...