Night Light Saver


Posted on Feb 7, 2014

A Microchip PIC12C508 8-pin CMOS Microcontroller turns a night light on and off with preset time everyday. Save Energy, No EMI, No Battery, Built-in Lamp Fixture, and Peak Shaving It`s time for 8-pin microcontroller Microchip PIC12C508, the SAVER V3. 2, my latest design of a device that turns a night light on and off everyday. The circuit uses only


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

a PIC12C508 8-pin CMOS micontroller and a small triac, MAC97A6. The Saver V3. 2 also demonstrates the use PCW PIC C Compiler. The schematic of the SAVER V3. 2 is depicted in Figure 1. A transformerless power supply uses Xc of a 0. 22uF capacitor to limit current providing about 10mA current source. The diodes rectifies ac current to dc current which in turns charged to filtering capacitor, 100uF. A 5. 1V zener diode provides dc supply ~5V to the PIC12C508. The microcontroller circuit runs with low power 32kHz X-tal. GP2 connects a momentary button for setting time to 8:00. GP1 drives small dot LED that blink every 5 s for normal running. GP0 directly drives with source current to a small triac MAC97A6. Saver. hex is HEX file suitable for writing the code to the PIC12C508 chip. This file sets time to 8:00 when press S1 once. Time on and off is set to 19:00 to 22:00 everyday. Although the Saver can operate even wrong connection of L and N to the circuit. The author suggests to correct AC line connection to L and N of the circuit. After finished installation, turn the main switch on, functioning LED will blink every 1 second. Let try press S1 once, the lamp will turn on 1 minute then off. The Saver assumes the current time is then be 8:00. Note that every time you press S1, the lamp will turn on 1 minute only once. The day after the lamp will then turn on and off at preset time. Functioning LED will blink at low rate...




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    FM reciever with classic TDA7000
    Two channel panning circuit
    Audio-power-amplifier
    Fire Alarm Circuit using LDR (Light Depending Resistor)
    Oscillator Core Examples
    Battery-Charging Indicator For Mains Adaptor
    AM Receivers
    Automatic UPS system wiring circuit diagram for Home or Office (New Design With One Live Wire)
    building my own aux circuit car stereo feedback
    LED-Circuits 7
    NMEA 2000 CAN Marine Interface
    Clock keeps on ticking
    Dimming Control Circuit for LEDs
    UV/IR/Visible LED Flashlight with Intensity Control



    Top