Am mE!

Thursday, 7 March 2013

Automatic switch for indoor light(using human detection) and outdoor light(using photo resistors)

Component List:

Resistors(3)
AC source
5v battery/source
Push button switches(2)
Buzzer
Light bulbs
LED red
LM044L display
PIC16F877
1K potentiometer
RTD14005F miniature pcb DPCO relay
DPDT switch
Light dependent resistor
ULN2003A

Features:

System can be engaged or disengaged via start and stop buttons
Implements a two way switching system with already existing switching system
Immediately turns off outside light when the outside is bright enough, and on when place is dark. Sensitivity can be carried with the potentiometer
Automatically turns on light when person is detected in the room.
Sounds buzzer when person is not detected, and prompts person to move, just in case the PIR failed to detect person
Turns of light after 10 seconds if no human is detected. This time can be varied in the code.

Download ISIS design file and code(.gcb, .hex, .lst, .asm) here!

Saturday, 12 January 2013

SINGLE PHASE AUTOMATIC TRANSFER SWITCH WITH OVER CURRENT PROTECTION USING PIC16F877

FEATURES:

*May add frequency sensing

Over current protection
Over voltage protection
Under voltage protection

Mode of Operation:
The default source of power is the utility supply. In a situation where the utility supply voltage is below 210V or above 270V the system would start the generator and cut of the utility supply, provided that the generator voltage is also within the specified range. In a case where both sources are out of range, no power would be supplied until one of them comes into the voltage range.

The current sensor monitors the current drawn. When the current goes above 10A, the system is cut off completely, a message is displayed instructing that the fault be cleared and the reset button press afterwards.

The LCD constantly displays the Voltages of both sources, the current drawn as well as the states of both sources(whether they are on or off)

THE VARIOUS PARTS

Voltage Sensor: