Use AT89C2051 microcontroller making steamed rice ark timer switch

Published:2011/5/22 8:19:00 Author:Crystal Liu | Keyword: AT89C2051 microcontroller making steamed rice ark timer switch, AT89C2051, 7805 | From:SeekIC

The circuit shows in figure 1.AT89C2051 single-chip microcomputer chip IC1 as the core of this circuit ,C3 and R10 formed simple automatic reset circuit.JT、 C1、C2 and ICl related pins formed SCM clock circuit.The display uses two share with anode type digital tube.15 I/O port of ICl all be used.Among them, the PI. 0 for seconds show lose exports,through a limited flow resistance of various digital tube connected to the decimal point electrode,during normal working,use decimal shining as seconds signal display ~P1．1-P1．7 as seven segment digital pipe section choose signal(Low-level effective) lose exports,through a limited flow resistance respectively ,connect the corresponding to the digital tube electrode.Digital pipe display dynamic scanning manner,it's dynamic bits choose signal respectively by IC P3．4 and P3．5 output ,high-level effective.



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