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]

Go to thinking about Jons's comment. Duh, I hadn't finished the schematic and failed to include any 500ohm resistors for the LEDs

 

[For The Popcorn]

Go to thinking about Jons's comment. Duh, I hadn't finished the schematic and failed to include any 500ohm resistors for the LEDs

What comment are you referring to? The one where I posted the table from the datasheet showing THE MAXIMUM CURRENT IS 1 mA? Apparently not that comment. Or maybe the comment where I suggested CHECKING HOW MUCH CURRENT THE CD4017B CAN SOURCE OR SINK?? Apparently not that comment either.

 

[For The Popcorn]

 

[MrDEB]

am going by the data sheet that says 10ma output.
maybe not at 5v?

 

[For The Popcorn]

My apologies. I forgot to include the picture. At Vdd = 5v, the maximum source or sink current is 1 mA. If Vdd = 15v, the maximum current is 6.8 mA. Nowhere does the datasheet claim 10mA.

I'll say no more.

 

[ChrisP58]

Here is the table with the 5Volt numbers marked.
Please note the Vo number at the left. That shows the actual pin voltage when driving the listed current.
The only 10mA number comes from the Absolut Maximum Values table. But that is an input current rating.
https://www.ti.com/lit/gpn/cd4017b

 

[MrDEB]

Well, I guess I need to make some input voltage adjustments.
There goes the 5v USB
Thanks

 

[MrDEB]

Here is a transformer for the LED strip lighting at a pretty good price.
We just need to add a voltage regulator.

 

[MrDEB]

been re-examining the 74hc595.
MY bad
It is a better choice
back to the drawing board