By connecting an Arduino board and using some simple circuitry and a vintage voltmeter, 'skytee' has created a bandwidth meter that certainly falls into the steampunk category of devices. Here it is in action:
By using a perl script, the incoming torrent speed is sent to an Arduino board which then drives the meter using a simple pulse-width modulation circuit. To recreate this meter from a hardware perspective is quite simple - with one of our Freetronics LeoStick boards and a matching ProtoStick for the PWM circuitry.
Finally, for more information, circuitry and the required software, click here.