JPS6490614A - Switch controller - Google Patents

Abstract

PURPOSE:To make the operation timing of a switching circuit accurate by operating each switching circuit by means of a microcomputer in a prescribed timing at a prescribed time difference. CONSTITUTION:A power on/off signal is supplied to a microcomputer 11 to output power on/off control signals C1, C2 corresponding to the input signal. The signals C1, C2 are fed sequentially to switching circuit 2, 3 with a preset time difference sequentially. The circuits 2, 3 consist a relay and a transistor, to which DC voltages V1,V2 are applied. Moreover, the computer 11 uses a timer function to control the timing of the input signals C1, C2 of the circuits 2, 3. In receiving the signal C1 or C2, since the circuits 2, 3 execute the switching, then outputs V3, V4 are outputted at a time difference to make the operation timing of the circuit accurate.