Sequence controller

A sequence controller for digital control of alternative digital output signals employed to control sequential energization and deenergization of a plurality of incremental loads in response to a received variable analog input signal, said sequence controller comprising an input terminal, a plurality of output terminals, a mode reference, comparing means producing a first digital mode response when the input signal received at said input terminal exceeds the mode reference and a second digital mode response when said mode reference exceeds the input signal, a clock producing digital pulses, means for sequentially shifting from a first to a second of said alternative output signals at an additional of said output terminals with each pulse produced by said clock while said first mode response is present, and an inhibitor controlled by said comparing means and coupled to said clock to selectively prevent shifting by the sequencing means.