This installation displays the current incoming internet traffic with fading led lights. The more traffic we have, the faster the LEDs are fading.
First i used some bell wire to attach a multiple LEDs on it. I used 2 colors, blue and cyan. These wires are attached to some simple PCB with a couple of BC337-16 transistors. These transistors are connected to my arduino uno PWM outputs.
Our small servers is connected to that arduino uno - which runs firmata 2.3. On that server we used node.js and node-firmata to communicate with the arduino uno board. To retrieve the network traffic i used snmp-native as an nodejs library, which retrieves the current bandwidth (wan incoming).
These values are used to speed up or slow down the fading. for this, a normal Sinus-function is used.
Here's the core of our warpcore:
which uses also this library:
You can watch a video here:
The project is documented here in german:
But can be translated with google here: