ѕυρєямαη said:I like using this one http://dartfordsound.com/dmx-dip-switch-calculator.php
i would rather get it from the people that designed it
http://www.ukslc.org/tools/dmx/dip_switch_calculator_20060624768.html
cause they also have a downloadable version http://www.ukslc.org/tools/DMX/DMXCalc.zip
thought this might help