A simple app that converts a number up to 512 into binary - useful for calculating DMX Dip Switch values when it's dark and you're up a ladder! 

I am a lighting technician, not a developer, so it's pretty basic!

Center button switches between the two modes. In address to binary mode, up/down keys increment or decrement the number. In binary to address mode, up/down keys select either '1' or '0' one at a time, so pressing up-up-down-up would result in 1-1-0-1