PIC Digital Clock

[muralibhat]

Hi I need a 16F877A digital clock circuit with DS1307 and 2*16 LCD display with source code Kindly Help

 

[BeeBop]

Hi I need a 16F877A digital clock circuit with DS1307 and 2*16 LCD display with source code

Would you like fries with that?

There must be a ton of them out there. Have you googled?

 

[muralibhat]

Thanks
Yes googled but did not get the specific one which I mentioned

 

[BeeBop]

OK, here is one:
http://www.best-microcontroller-projects.com/real-time-clock-ic.html
It uses another pic, but should be easy to adapt to what you need.
Here is another:
http://www.rentron.com/PicBasic1.htm
There are lots more. Try gooling "16f877 DS1307 project"

 

[muralibhat]

Thanks I will Try the links

 

[pasanrobotics]

Y dont u try this one. Its working perfectly.

https://www.hamradioindia.org/circuits/clock.php

**broken link removed**

 

[muralibhat]

Thank You The project you have suggested is good but it uses the LED not LCD any way it is simple to shift to LCD

 

[BeeBop]

it is simple to shift to LCD

You should try it then. That is where the learning will take place. What language are you using?

 

[pasanrobotics]

Thank You The project you have suggested is good but it uses the LED not LCD any way it is simple to shift to LCD

When u modified it to LCD plz give us schematics and codes

 

[jofp]

guys, how about a digital clock using pic16f84a?? do you guys have any suggested sites??? because just like muralibhat i didnt got a specific result of this project using pic16f84a.... pls help!!! coz starting today i only got 10 more days left to do it..

 

[muralibhat]

Of course I use assembly language

 

[BeeBop]

Then the best tutorial would be Nigel's:

Once you work through this, you will be able to make the change.

 

[muralibhat]

Thanks I have dowloaded Hitech Picc LIte compiler just to know the how easy it is programm in C but I cannot install it becos it gives the message that the MPLAB IDE is 6.5 version or higher but My IDE is 6.0 version.
Please help

 

[kchriste]

Then download the latest version from MicroChip:
https://ww1.microchip.com/downloads/en/DeviceDoc/MP750.zip

 

[muralibhat]

Problem in the circuit!

Thaks everyone who cooperated
I have finished the circuit and the program but the clock i.e.DS1307 starts only if I touch anu pins of any IC or positive terminal or ground. I cannot figure out the problem.Please Help

 

[BeeBop]

starts only if I touch anu pins of any IC or positive terminal or ground

Do you have decoupling capacitors(100nF, marked 104) between the power pin, and ground, for each of your chips?

 

[muralibhat]

Thank you Bee Bop I will try this and inform you accordingly

 

[muralibhat]

Hello, I have connected the caps but still it is not working . If I switch off the power suplay and turn it on after some time I found that the clock has incremented(Even If I do not touch the pins). I clock comes to halt only if I aplay power to PIC.As i explained earlier If I touch the pins then the display shows the clock increment

 

[BeeBop]

i.e.DS1307 starts only if I touch anu pins of any IC or positive terminal or ground.

Hmmm... are you clearing the 'clock halt' bit in the ds1307? Look on page 8 of your data sheet:

Please note that the initial power-on state of all registers is not defined. Therefore, it is important to
enable the oscillator (CH bit = 0) during initial configuration.

Also, are you using a back up battery? If not, is the Vbat pin of the clock grounded?

 

[muralibhat]

Thanks BEE BOP,
I found the problem---I had connected a different power suplay for backlit(LCD)That was making the problem.Now I have connected the same power suplay which I use for the circuit.
Now I have a different problem i.e. I cannot write to Ds1307 with new data. Is it neccessary to HALT the ds1307 before writing?Note that my clock is working and it starts from 00:00:00 and 01/01/00