AT89C2051 Night Light Saver


Posted on Feb 4, 2014

The Saver V5. 0 runs simple clock emulation program, turns a night light on and off with preset time, say 19:00 to 22:00 everyday. The design features low cost, easy installation, no battery backup and no EMI. The AT89C2051 uses external oscillator generated by Schmitt trigger gate CD4093, ~680kHz. Reference frequency was derived from 50Hz main lin


AT89C2051 Night Light Saver
Click here to download the full size of the above Circuit.

e. Time setting only allows at 18:00 by pressing time set button once. If main line has failed, functioning LED will blink at high rate. Since there is no battery backup, thus repressing the button is then needed. The output is capable of driving say, a 25W incandescent lamp.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    200mW FM transmitter
    Tri-Tet Oscillator
    A 555 TIMER LED FLASHER CIRCUIT
    LM1800 Stereo Demodulator
    Timed Burglar Alarm N/O - N/C
    Digital Step-Km Counter
    Wireless microphone schematic
    ZAP Xebra circuit diagram
    AP500 and its application circuit ab
    RF Remote Control Switch Rx-Tx circuits



    Top