The ones I got actually run the LEDs in parallel, and have a small SMD resistor that acts as a voltage divider for each one, so that they get the appropriate voltage across to light up correctly.

This raised a question for [Tim], as typically, different LEDs light up at different forward voltages and this can cause issues when running different color LEDs in parallel together.

Christmas lights themselves are a very simple circuit—in fact, they’re a great medium to learn about the flow of electricity.

Parallel LED drivers can be used to create the fast, square, high-current waveforms required for automated image processing. And it’s possible to extend such waveforms to higher ...

This raised a question for [Tim], as typically, different LEDs light up at different forward voltages and this can cause issues when running different color LEDs in parallel together.

The LEDs may dim if the motherboard can't supply enough current to the LEDs (make sure you wire them in parallel), but other than that no.<P>Try two LEDs first, then 3. Don't use super-powerful ...

Many devices use multi-digit seven-segment LED indicators with dynamic indication. Usually they are connected to the ports of the microcontroller or to specialized driver ICs, such as the MAX7219.