This is a simple 0 to 9 counter circuit constructed using Arduino! Here, a common cathode 7-segment LED display is connected to Arduino for displaying the digits. The code (Arduino sketch) allows push ...

So [Todd] has set out to build an Arduino frequency counter for a Kenwood TS-520S ... It’s rather involved just to make sure that [Todd’s] initial idea is viable so he spends about 35 minutes ...

And what's a geiger counter without ominous clicking? The Arduino microcontroller counts ... they released everything onto the web to make sure that our friends in Japan can check themselves ...

Making a microcontroller perform as a frequency ... It’s something [FrankBuss] has approached with an Arduino-based counter that offloads the timing question to a host PC, and thus claims ...