OK, I need to make it and test it, but here is the revised schematic...

The size of the final PCB is almost exactly the size of Jens, 4" X 3¼".

Now to translate it into a .gif file, and clean it up. I don't like their chip DIP pads, and I'll make the others prettier too.

 

Bill,
How do you take your PCB file from express and change it to a printable version?
Thanks Jim

 

You print it in Adobe format, then load it into Gimp. This is what I recall at least.

 

Gentlemen,

How does this device work, please? Would a back and forth Night Rider sequence limit you to 12 or 13 LEDs because you're connecting each LED to two sequence positions?

Cheerful regards, Mike

 

The diodes allow two CD4017 outputs to turn on an LED so you Can have very long sequences.
I designed this circut for ten 50mA LEDs over 2 years ago but I haven't built it yet.
It blinks each LED for a short duration to save power.

 

@Bill:

Nice work! One question: Why is the distance between CR18 and CR19 greater than CR26 and CR27, and CR34 and CR35?

Maybe I just don't see why...

Looking at my board... I might give it another shot.

 

Nice work! One question: Why is the distance between CR18 and CR19 greater than CR26 and CR27, and CR34 and CR35?

Dern if I know off the top of my head. I try to keep a constant spacing when I lay it out, and still don't succeed. You will also note that one of the diodes is 180° out too. This final step, where I polish the board (and figured how to get Gimp back to 600DPI) I usually have to tweak a lot of the board by hand. The idea is to get all the traces to squeak by the pads at a comfortable distance.

Here is the final product after polish...

VBulliten kept trying to convert my .gif file into a .jpg file (with will heavily distort the image) so I moved it into the .zip file to maintain integrity. The picture above is just that, a pretty picture, not the working file. I started with the image in post #61 and started modifying it.

This time I added the pad shapes to my PaintCAD files.

 

Side thought, you can replace the BJTs with small MOSFETs though, I believe there are some with compatible pinouts.

I'd certainly agree with that, small TO-92 or surface mount MOSFTs abound and that would solve the current draw problem.

 

Gentlemen,

How does this device work, please? Would a back and forth Night Rider sequence limit you to 12 or 13 LEDs because you're connecting each LED to two sequence positions?

Cheerful regards, Mike

Pretty much. You need 2N-1 outputs for a back and forth sweep, so for a 10 LED sweep you need 19 sequences.

This device will do 13 LEDs max. 2X 4017 chips will do 17 LEDs.

 

OK Bill,
I tried to dwnload your PCB to print because I would love to DIY this pcb and get it to work(lol still newbe) for another project I'm working on. But when I did the print out is to large. The PCB came out 6 1/4" X 5 1/8" so I figured I have to shrink it somehow. Can you help me ? And can you post a shopping list? I really want to build this one!
Thanks Jim

 

By too large you are talking printing it with Gimp?

Load Gimp
Load "25 LED Seq Copper.gif"
Edit (top tool bar, second choice)
<preferences>
..<default image> (at this point a new screen pops up)
..<advanced options> (middle of new screen, shows 72 pixels/in for X,Y)
..Adjust DPI for X,Y to 600 DPI, it is now correct. X and Y are linked.
..<OK>

<Image> 5th one across on toolboard
..<Print Size> type (don't use the arrows) 600 DPI on X, tab down Y and it will automatically adjust to match X.

Now you are back to main screen again. <print>

Gimp got into a weird mode on me, I had to completely exit the program, reload Gimp and the program (after resaving it on my desktop) to get it to work. Gimp is frustrating the heck out of me. I do not class it as easy to use, ever, but it will do 600 DPI on the printer.

If I can find something as easy to use as Paint with the resolution of Gimp I will leave it and never look back.

 

Bill,
I downloaded the Att. files on post #67 (25 led sequencer.zip) to my desktop, unzipped and tried to print as I did with our fader pcb but this time it didn't print the right size for transfer. I guess I don't understand how to print and create a file in gimp! I will try again. I can't find 25 LED Seq Copper.gif file?
Thanks Jim

 

I tried downloading the zip file using Firefox (this should not make a difference, all browsers are pretty similar at this level). I opened the file and looked at the list of contents, which I have attached a partial screen.

I had the devils own time getting it to work, I posted what I did. Were you able to find the controls as I listed them? It was very much trial and error on my part.

If all else fails I can mail you a copy of the templates, say 4 or 5, on wax paper.

 

Bill,
I tried again and got nada, I opened gimp found files but not the one I need to open only the 2 from express pcb and sch. Can you either email or snail mail. If you snail mail can you include a copy on plain white paper?
Thank you Jim

 

Looking at it with windows (not gimp) you didn't see 3 files? This is disturbing. They are there, I have verified it. You are using WinXP? With XP you can treat a saved zip file as a folder.

I'll get back with you, it isn't really practical to mail a copy of the print on paper, as trying to copy it will loose critical details. Voice of experience. You must print it directly. So I guess some templates are coming up in a few days.

I've been under the weather, it will take a little while.

 

OK, yours is on the way, if it isn't there already.

Meanwhile, I've been making mine.

Let the soldering begin...