Re: Adjustable/Resetable Digital Alarm Clock using 8051(89s52/89c52) in 7 segment dis

[muhd_ehsan]

Re: Adjustable/Resetable Digital Alarm Clock using 8051(89s52/89c52) in 7 segment dis

What is the input voltage for this project?
https://www.edaboard.com/threads/227608/

 

[arunbharathi.arasu]

Re: Adjustable/Resetable Digital Alarm Clock using 8051(89s52/89c52) in 7 segment dis

hi,

hope you know 8051 is working in +5v.

if you have 5V power supply u can give directly.
In case you have 12V power supply use 7805 votage converter ic.
The input of 7805 is 12V and output is 5V.

 

[muhd_ehsan]

Re: Adjustable/Resetable Digital Alarm Clock using 8051(89s52/89c52) in 7 segment dis

why is my project isn't working properly? When i turn it on, it doesn't show 12.00 am but it wil appear random number and change everytime. It doesn't work like a clock.

 

[bhabanietc]

Re: Adjustable/Resetable Digital Alarm Clock using 8051(89s52/89c52) in 7 segment dis

Can you explain the project about the connections. Are you using 7-seg driver or directly connected to the 8051 port pins.
If you are using directly then take care of the delays & continuously ON the 7-seg LED. Explain more about the program & the connections.