A transistor tester can be a handy addition to your electronics workbench. This versatile transistor tester design, first presented a decade ago, enables you to quickly assess the functionality of NPN ...

LED chaser lights (or) sequential LED flasher circuit on a breadboard using 555 timer + 4017 IC and a few other components. The LED’s chasing rate can be adjusted using a potentiometer in place of 47K ...

Over the last year, the production of homebrew electronic badges for conferences has exploded. This is badgelife — the creation of custom hardware, a trial by fire of manufacturing, and a mountain of ...

[Collin Cunningham] over at Make recently wrapped up another edition of “Collin’s Lab” – this time around, the subject is breadboards. He starts off by discussing a common solderless breadboard, ...

Simple but effective all-analog fading LED circuit. This simple fading LED circuit is basically a relaxation oscillator based on a PUT (Programmable Unijunction Transistor) device, that is formed by ...

PCB design is easy, right? To a certain extent that’s fair to say; with a growing number of schematic design and PCB layout packages available — normally integrated, increasingly free — almost anyone ...