This is an interesting way to count your website pageviews. The counter will be connected to rs232 port through a few of electronic components that performs as a counter driver and power supply circuit.The counter that I used is a mechanical counter or electromagnetic counter model SC-212 which I get from an old coin-op game machine as shown in the photo. It requires 12VDC power supply, this means that it requires a 12V pulse to increase the counter by 1.