摘要：Automatic light timer circuit is a simple circuit that automatically apply theprinciple, whereby a system can operate with its own prior existence of humanintervention as the operator. This circuit uses an automatic switch, which thecentral processing circuit to work is there at IC IC programable AT89S51 whichis very influential in it. Output from the timer circuit automatically in the formof incandescent lamp that can light up automatically and manually extinguished,the number of incandescent lamps in series is 4 (four) incandescent lamps. In thecircuit analysis, circuit loading and automatic light timers there are 4 (four)blocks of the system ie, the block input (power supply), program control block,relay block and the block indicator lights as a supporter of the circuit blocks andanalyzes in detail the work.
