Building LED arrays that can display all sorts of different patterns is pretty easy these days. Hook up an Arduino ... His LED chaser/light show does not use any microcontrollers at all, rather ...

Here you can find the circuit diagram for the Bidirectional Counter using Arduino. The circuit diagram below represents how ...

So [Todd] has set out to build an Arduino frequency counter for a Kenwood TS-520S HF ham radio. This post (and the video found after the break) doesn’t cover the entire project. It’s rather ...