using a RTC in SF basic

[MrDEB]

I have a DS-1302 RTC module but how to use it?
I recall Jon Chandler made a vu meter clock but what he used for timing?
Am planning on a clock that has no hands, just LEDs but precision would be nice.

 

[MrDEB]

I didn't want the same data stream from the first 595 to te last so each 595 has its own data stream.
I am probably wrong after watching the video in post #105?
After I get my test boards and do some experimenting.

 

[be80be]

You clock out what you want and latch it. You only need 4 pins

 

[For The Popcorn]

You clock out what you want and latch it. You only need 4 pins

That has been explained several times. I give up. I'm done.

 

[be80be]

Guess he never caught on to serial
You send out the data to let’s say 10 595 it’s in a sting clock it all out then latch it what’s there to miss. Don’t forget first bit is last maybe that’s it

 

[For The Popcorn]

All explained already. The connections, shifting data, etc.

I did this before I saw your schematic. Please do it this way. Use the Swordfish SHIFT module.

ALL of the LEDs, including the 7-segment displays should be operated from the same data stream, clock and latch lines. Set up an array of bytes equal to the number of 74595s. When the display is to be updated, update the needed array elements and shift out ALL of the data then pulse the latch high.

The output enable pins may be used to dim the displays. I have separated the clock LEDs from the display LEDs so each section can be controlled independently.

You have a high chance of success using this circuit and it will be easy to route.

View attachment 147945

 

[MrDEB]

Making suggested changes

 

[For The Popcorn]

It's not about copying a schematic – it's about UNDERSTANDING what the circuit is doing. If you don't understand how it works, just stop. Do something else. EVERYTHING you need to know has already been explained.