The 7493 now resets at 6. So, what's the count now? 0 - 59. I'm on my way. I'm trying to figure out the power supply. I don't want to run a clock from a 6 V lantern battery.

 

What are you going to use for a time base in your clock? That may help you out while thinking about your power supply.

 

What are you going to use for a time base in your clock? That may help you out while thinking about your power supply.

I was thinking this:

 

I was thinking this:

Your attachment didn't make it....

 

Your attachment didn't make it....

I know, the link was bad or something. It was the same thing as the IMG I posted above.

 

Are you talking about the image in Post # 30?? If so, a 555 is not a very stable time base for telling time with any real accuracy. Again, think about your power supply.

 

Are you talking about the image in Post # 30?? If so, a 555 is not a very stable time base for telling time with any real accuracy. Again, think about your power supply.

I am going to clock it from the 60 Hz coming out of the wall. I am working on designing the power supply now. I posted the IMG of the schematic in post #43.

 

I posted the IMG of the schematic in post #43.

That's MY problem, then. I can't see any image in post #43. Strange!

 

That's MY problem, then. I can't see any image in post #43. Strange!

That is strange. Here it is again:

 

That is strange. Here it is again:

This is indeed strange. I can see the image in post # 30 but not in post # 43 or in your last one.. I've checked my preferences in "Thread Display Options" and I have the "Show Images" box checked. I'm at a loss.

 

The IMG I posted (I believe) was uploaded as a PNG. Could this be the problem?

It is also hosted on AAC. I will try hosting it with Photo Bucket and reposting. Very strange, indeed.

 

Here it is:

Direct Link

 

That one, I can see. Very strange. I've always been able to see PNG files before. I use Firefox as a browser. Maybe one of the many, many updates that are force fed to us has has some effect.

Anyway, the only thing I would add to your design would be for you to check the datasheet for your 7805 and follow their recommendations for small caps on the input and output lines.

 

I see what you are saying on the datasheet. I will use the 2200 μF for the filter then I will put a 0.1 μF on both sides of the 7805.