Port 1 of the controller (AT89C4051) is used as the data lines for the LCD (starting from pin 7- pin14 of LCD). here i am using a 16 x 2 lines LCD display. In the first line, I`ll display `DAY` and `DATE`, in the second line, i am displaying `TIME` with am/pm. Port 3 is used for the clock setting and it also provides the necessary control signals for the LCD.
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As shown in the diagram, switch3 will be used to select the parameter which need to be changed, switch 1 and 2, are used to increase or decrease the selected parameter value. The source code for the project is written in C-language, and compiled using Keil C compiler, you can download the c-code, schematic, and if you don`t have a cross compiler then you can directly burn the HEX file on to your chip, clock. zip. NOTE: If you think that there is a problem in the availability of the chip mentioned in the schematic, then you can also use AT89C51/AT89C52, make sure that you are using the same port for LCD and switches which are there in the C-file or in the schematic.
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