How calculator interfacing with 8051 processor?

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#1 21662147 13 May 2012 22:01

Pradip Neupane Pradip Neupane

Anonymous

Post #1
21662147 13 May 2012 22:01

I have not found the exact circuit in internet. I am just getting difficulty in my project.
I am using calculator as a keyboard to enter the password.
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#2 21662148 14 May 2012 00:40

Prakash Rajolli Prakash Rajolli

Anonymous

Post #2
21662148 14 May 2012 00:40

Kindly elaborate more.

Do you asking for hardware design?

-Prakash
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#3 21662149 14 May 2012 11:57

Pradip Neupane Pradip Neupane

Anonymous

Post #3
21662149 14 May 2012 11:57

yes, I am asking for the hardware design. The digit that we enter in calculator act as the password. That password compare with the internal digit of store in processor memory ,thus necessary work can be done through output signal.
#4 21662150 31 May 2012 15:56

Bruce Brodsky Bruce Brodsky

Anonymous

Post #4
21662150 31 May 2012 15:56

Are you just using the kepad FROM a calculator? Otherwise the calculator wound have to have an output to use. The LED display signals could be used but that would be very comlicated because the digits are typically multiplexed,
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How calculator interfacing with 8051 processor?

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