A stepper motor's coils need more current than a GPIO pin can supply directly. The ULN2003 board sits between the ESP32-S3 and the motor, amplifying 4 weak digital signals (IN1 – IN4) into the ...

We present colosseum, a low-cost, modular, and automated fluid sampling device for scalable microfluidic applications. The colosseum fraction collector can be built for around $100 using off-the-shelf ...

Split-flap displays are a great, low-power way to display text to a wide audience. Compared to other display technologies like LCDs they only use energy when the characters change, but have fallen out ...

This is a DIY electronics project article that teaches readers how to build a low-cost 3D LiDAR mapping system using a ...

If you grew up playing with LOGO on an old 8-bit computer, you’re probably familiar with the concept of a drawbot. It’s a simple robot that drags a pen around to draw on paper. [Tim] decided to build ...