Ryan Mitchell

Frame flex is the silent killer of robot performance. You spend weeks tuning PID loops, calibrating sensors, and perfecting your navigation stack, only to discover your robot drifts, wobbles, or veers off course because the chassis bends under load. If you have ever watched your autonomous robot miss its target by inches and suspected the … Read more

You power up your robot arm, quadcopter, or RC car, and the servo starts vibrating like it has a mind of its own. That rapid, nervous twitching is called servo jitter, and it is one of the most common problems hobbyists and engineers face with servo motors. I have spent years building Arduino and Raspberry … Read more

I have spent the last decade building robots and motor-driven gadgets, and I can tell you that nothing unlocks bidirectional motion quite like the H-bridge motor driver. An H-bridge motor driver is a circuit built from four switches arranged in an “H” shape that lets you reverse the polarity of the voltage applied to a … Read more

I have been building robots for over a decade, and the question I get most often is still the simplest: should I use aluminum or 3D printed parts for my robot chassis? It is a fair question, because the choice defines everything that follows. Your motor sizing, your battery budget, your fabrication timeline, even your … Read more

Every robot arm joint lives or dies by one number: torque. Get the calculation right, and your arm moves smoothly, lifts its payload, and runs for years without burning out a motor. Get it wrong, and you end up with a stalled joint, a smoking servo, or an arm that collapses under its own weight. … Read more

When you build a mobile robot, the wheel system you choose shapes everything that follows. Your decision affects how the robot moves, how hard it is to program, what surfaces it can handle, and how much money you spend over its lifetime. The three options that dominate mobile robot locomotion are differential drive, mecanum wheels, … Read more

PWM servo control is the signaling method that tells a hobby servo exactly where to point its shaft. Every RC car steering linkage, robot arm joint, and drone gimbal relies on these tiny electrical pulses to move with precision. If you have ever wondered why your servo jitters, why it only responds at 50Hz, or … Read more

Every robotics builder hits the same fork in the road eventually. You stand in front of three boards — an Arduino, a Raspberry Pi, and an ESP32 — and the question stares back at you: which one do I actually need? I have been building robots and embedded systems for over a decade, and our … Read more

Interrupt handling on a microcontroller is the mechanism that lets the processor pause whatever it is doing, respond immediately to an important event, and then pick up right where it left off. Instead of constantly checking whether something happened, the CPU waits for a signal and reacts only when needed. This approach saves processing time, … Read more

If you have spent any time around robotics engineering, you have probably heard the term FPGA thrown around in conversations about motor controllers, sensor fusion, and real-time processing. But what exactly is an FPGA, and does it actually matter for building robots? An FPGA, or Field-Programmable Gate Array, is a type of integrated circuit that … Read more