How Many LEDs Can An Arduino Control?

An Arduino can theoretically control as many LEDs as you require for your design, only limited by the power supply current available. However if you want to control more LEDs than there are digital pins on your Arduino board, you will need to use some additional hardware. In this tutorial we will investigate the advantages…

What Happens If You Don’t Use A Resistor With a LED? Essential LED guide

It is acceptable to use a LED without a resistor, but some method of limiting the current must be used in order to prevent the device from being destroyed. Failure to limit the current could lead to the device burning out, failing prematurely or even exploding. I have certainly blown up a few LEDs in…