Abstract
Along with electronic technology swift development, the people living standard's enhancement and rhythm of life's quickening, the electrical appliances product is more and more thorough people's daily life. This system research's content is take the monolithic integrated circuit as the central washer control system design, the system uses the common low-price quality merchandise ATMEL monolithic integrated circuit AT89C51 to take the control core. In order to prevent because of the power source to be excessively low or the power source discontinuity power supply causes the computer active status to be chaotic, has designed the undervoltage examination protection circuit. If has the dehydration to uncap or the dehydration by mistake not balanced and so on conditions, the buzzer sounds, to prompt the user to carry on processing, guarantees the washer and the personal safety. This design pressed key are few, selects the single end direct input method, makes the electric circuit to be simple. The power driving circuit carries on first after the triode tube the electric current enlarges adds to relay's control again on extremely, takes relay's trigger pip. Implements by the relay to the electric motor, the inlet valve, draw-off valve's control. The display circuit uses three light emitter diodes to make the program selection key function demonstration. The power circuit passes through the live pressure, the rectification, after the filter, after three end integration manostat 7805 output stable 5V DC voltage, takes program timer's main power source.
key word: Monolithic integrated circuit washer procedure power source
