DATA LOGGER

FEATURES:
Measures Voltage and Current values and logs them to EEPROM(bad idea)
Logs time and date together with measured values
 SETUP:
 At startup press INC key to set date, DEC key to set time
 In Date setup mode, press INC key to set year, DEC key to set month, AUX key to set day
 In Time Setup mode, press INC key to set hour, DEC key to set minute, AUX key to set second
 Use INC, DEC keys to increase or decrease values
Note*
Time may not be so accurate
Download Files HERE!

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!

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:

 

Simple step down and rectification is used

Current Sensing:

Current is sensed using an acs712 current sensor from allegro

Power Sources:

Display Unit and Relay Driver:

Microcontroller:

Download Design files and Code here!

Microcontroller Based Automatic Three-Phase Change Over Switch

.......Work in PROGRESS!!

Features
Over voltage protection
Under voltage protection
Protection against Unbalance due to one or more phases going off
Etc etc.

Make your own PIC programmer!!

CLICK here to see more.....