Testing for failure with a multimeter is only partially effective, whereas a dedicated optocoupler testing circuit provides clear results in just seconds. For related tutorials and step-by-step build ...

In this project I did a Christmas jumper with rgb LEDs, this can also be a creative clothing project or whatever you want, it uses rgb LEDs that are controlled by an Arduino-based microcontroller that ...

Like many of us, [Tim]’s seen online videos of circuit sculptures containing illuminated LED filaments. Unlike most of us, however, he went a step further by using graph theory to design glowing ...

A basic building block is often the key to completing an analog signal path in various applications, such as automated test equipment.

Using a single GPIO port on a microcontroller to control N bits of arbitrary parallel binary outputs, e.g., a multi-digital display.

Although it dates back to the early days of the Marconi Company in the 1920s, the Franklin oscillator has remained a ...

Custom Samsung nozzle (Part #2026-5654) supports placement of LiteOn TLMH4TGVADA LEDs on Samsung CP45 and SM10–SM421 pick-and-place platforms. Design incorporates a Samsung-style nozzle base with a ...

Abstract: In this brief, an inductor-less low-noise amplifier (LNA) that utilizes a noise-canceling technique along with dual-resistor feedback is proposed. The conventional single-resistor feedback ...

The FreeCad files can be downloaded here (top half) and here (bottom half). The STL files for the slicer can be downloaded here (top half) and here (bottom half). Two 9 mm long sections of used empty ...