LED display Digital Calendar AT89C2051

This Project Digital Calendar using Microcontroller is an advanced digital calendar, which displays the Date, Day, Month over the LED display. It has an 8 bit Microcontroller which runs on the Program embedded on its ROM. Separate LEDs are provided for the date, day, and month. The system has an battery backup so that it can run over all the time even during the power failure.
LED display Digital Calendar AT89C2051 - schematic

Totally there are 31 LEDs for indicating the date and 12 LEDs for indicating the Month and 7 LEDs to indicate the day. All the above systems are controlled by the Microcontroller. In our project we are using the popular 8 bit micro

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NKWENTI   Jul 6, 2018

What are the use of pin 6,7,8,9 and where are they to be connected... i mean the IC AT89C2051... thanks n waiting for ur help

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