Week 5

Research about the Schematic Diagram

For this project, i have use PIC 16F72. In this project, i have use Port A, Port B and Port C. All this port have  own function

PORT A

Port A can acts as a both input as well as output port. It is having 6 pins (A0-A5). In these A0 is connected to Dimmer1, A1 is connected to Dimmer2 and A4 is connected to ZCD output.

PORT B

Port B can acts as a both input as well as output port. It is having 8 pins (B0-B7). In these B1 connected to register selection pin(R/S), B2 is connected to read/write(R/W) and B3 pin is connected to enable pin.

PORT C

Port C can acts as a both input as well as output port. It is having 8 pins (C0-C7). In these RC3 and RC4 connected to the thermostat pins.12M Hz Crystal Oscillator is connected in between 9th and 10th pins of micro controller. Reset pin is connected to the pin number1 i.e., MCLR/VPP.8th and 19th pins are connected to ground (Vss).