PREPARATION AND ANALYSIS OF AUTOMATIC LIGHT TIMER CIRCUITS WITH IC MICROCONTROLLER AT89S51.

Automatic light timer circuit is a simple circuit that automatically apply the principle, whereby a system can operate with its own prior existence of human intervention as the operator. This circuit uses an automatic switch, which the central processing circuit to work is there at IC IC programable AT89S51 which is very influential in it. Output from the timer circuit automatically in the form of incandescent lamp that can light up automatically and manually extinguished, the number of incandescent lamps in series is 4 (four) incandescent lamps. In the circuit 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 and analyzes in detail the work.