circuit diagram and component

figure: circuit diagram for pic

component discribtion

1. power supply

figure: This is a regulator power supply to + 5v.maximun flow to this regulator is 1amp.

2.  Xtal ceramic 4MHz

figure: Pictured above is a ceramic resonator for a timer for PIC. Ceramic resonator in use is 4Mhz.Ceramic resonator must be used to enable PIC 16F873A / maximum 16F877A for ceramic resonator in use is 20MHz.

3. lcd 16 bit

figure: LCD in use is measuring 16x2. The objective in use is to display the results in the programming examples such as display temperature, time and etc.LCD has a 16-foot (pin).

Adjustable resistors (preset) (the 1K -10K) is used to change the brightness level of the display writing, by the way be connected to the LCD 3 feet.

15 and 16 feet for LCD is light (LED) LCD.resistor on leg extensions 16 are used to limit the LED current to prevent damage.