Mini-RDS component board

[Aurbo99]

Here is a little something rigged up this afternoon.

As I hate having wires and components floating around inside my projects I try to find a way to get them hard mounted somewhere on a board.


I etched up a pcb to fit between the pins of a DB25 male connector, the .pcb file is attached at the end of this post.

http://doityourselfchristmas.com/forums/picture.php?albumid=19&pictureid=294

All the parts except the 220,22pf caps, Diode and resistor were scavanged from old computer parts I collect every chance I get.

http://doityourselfchristmas.com/forums/picture.php?albumid=19&pictureid=295

a small selection of my scavenged wiring harnesses and switches off old computer cases.

http://doityourselfchristmas.com/forums/picture.php?albumid=19&pictureid=297

All Done!
http://doityourselfchristmas.com/forums/picture.php?albumid=19&pictureid=296

In order from bottom to top on the image below;


*EDIT.. image below has been changed to reflect the RDS to Transmitter lines soldered in backwards on the first images.. DUH... :)

RDS Data Input to Transmitter, Brown/White, white wire is 30 gauge which fits into the via's of the transmitter making it easy to solder the ground without needing to scratch away the coating.

Output from RDS, Purple/White

RDS to LPT lines, Blue/Yellow/White.. TAKE NOTE BLUE and YELLOW are crossed at the pcb becomming Yellow/Blue/White, this was intentional for the traces to remain on 1 side.

RDS power feed, Red/White

Transmitter power feed Red/White,

next this the switch, Red/Red

Finally the Power input Red/White soldered to a Radio Shack power jack,

What I didn't install at this point is the power led, it will need a 680 ohm resistor, I'll get to that later. perhaps a revised pcb with the led resistor on board as well and make use of the free wired led's from the harnesses.

http://doityourselfchristmas.com/forums/picture.php?albumid=19&pictureid=306

On the above image you can see the shiny solder patch in the upper left corner of the pcb near the power feed wires, this is the pin25 grounding trace that connects to the bottom side of the board with a through-hole via made from a left over piece of resistor lead.

Power is provided to both the RDS and Transmitter from the ATX computer supply. I scavanged a nice micro mini-ATX 3"x4"x6" out of a baby-atx tower.

A DB25 patch cord is all thats needed to to connect to the computer.

My Radio is a Vastelec FM02 20mw transmitter

I used a 62K resistor 22pf and a 220pf cap for the RDS to Transmitter circuit.

Why a 62K, no real theory for that choice, I asked around and that value popped up, it works, I had to dial DOWN my RDS trim pot to stop it from oversaturating the transmitter.

The 1n4148 is the only component needed for the RDS to Computer bi-directional port.

The .pcb has a layout for the Bi-Directional Serial port as well.

Mini-RDS homepage (http://pira.cz/rds/show.asp?art=minirds_encoder)


rds.pcb for ExpresPCB (http://doityourselfchristmas.com/forums/attachment.php?attachmentid=3326&d=1232764565)

[Wayne J]

OK, no pics again.

EDIT: Just checked them out from the album, looks cool.

[Aurbo99]

Not sure what to tell you all,

I see the pictures in both threads..

While my subscription to the Forum expired at midnight tonight its already been renewed for another year, so I can't see that being the problem.

All pics are using the BB code and inserted using the "insert image" button


Check CP options under "Edit Options" > "Thread Display Options" > "Visible Post Elements" all 3 checkmarks in the boxes?

[RichF]

I see the pictures too. Even right after the post was created last night.

[kenl92]

I can see the pics as well!

[omzig]

Weird...I don't see any inline images in your post either. Like Wayne says, I can only see them in your album (http://www.doityourselfchristmas.com/forums/album.php?albumid=19).

[Wayne J]

We are looking into it.

[dmcole]

In-line images display with the current versions of IE or FF on Windows, but do not display with FF or Safari on Mac.

\dmc

[omzig]

In-line images display with the current versions of IE or FF on Windows, but do not display with FF or Safari on Mac.

\dmcI am using the current version of FF on XP. Inline images appear for me everywhere else on the forum.

[Wayne J]

OK! I figured this out!
Here is what to do.......

Go to http://www.doityourselfchristmas.com (http://www.doityourselfchristmas.com/)

You should be logged in when you get there. Look at the top left to see.

Then, on the left side, look for the 'site navigation' should be the top left block.
Click on the "Forum" link.

When you arrive, you should be logged out. Log in at this screen.

Problem fixed. ;)

Worked on two machines here.

[dmcole]

When you arrive, you should be logged out. Log in at this screen.

Problem fixed. ;)

Worked on two machines here.

Yes ... I logged out from my account on FF, then logged back in, visited this page and the pictures appeared.

There must be a cookie set askew somewhere ...

\dmc