Arduino Mega Control Shield for a 6-Axis Robotic Arm on a 4-Wheel Mobile Base
Wiring a robot with a mobile base and a robotic arm on top quickly gets messy. You end up with dozens of jumper wires for stepper drivers, endstops, servos and power, all going into an Arduino Mega. A single loose Dupont connector can cost you an afternoon of debugging. To fix this, I designed a […]
A 6-Axis Endstop Breakout Board with Built-In Pull-Ups and Filtering
If you’ve ever wired more than two or three limit switches to a microcontroller, you already know the pain: a rat’s nest of resistors, a breadboard that shakes loose the moment the machine starts moving, and, worst of all, endstops that trigger randomly because of electrical noise picked up next to your motor cables. I […]
DIY Relay Oscillator: Building an Electromechanical Flasher with a Relay and a Transistor
When people think of an “oscillator,” their mind usually jumps straight to a 555 timer, a microcontroller blinking an LED, or a quartz crystal. Long before these became the standard approach, electromechanical relay oscillators were a common and elegant solution for generating periodic signals, driving flashers, or switching loads in a repeating cycle. The project […]
