This expandable LED display for a microcontroller in Figure 1 has a simple interface with only 6 data/control wires and can be easily accommodated to a DIY design. The display has static indication.

A blast from the Elektor archives: this 1998 battery tester uses a simple LED display to reveal a battery’s true condition under load — even below 1 V.

Discover how to create a functional DIY solar panel using a compact disc, copper foil, aluminum foil, and LEDs in this engaging science experiment. Watch as we assemble the components, connect the ...

These light up paper circuit cards were much easier to make than I expected and only need a few inexpensive materials.

For me, when I start a new project, I am not interested in directly copying an idea that is already out there. On the contrary, I find it more fulfilling to work to improve those ideas by adding new ...