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 […]