Close
0%
0%

CXA1145 Video Processor Breakout board

I wasn't very happy with how I modified my Sega Master System so made a PCB to do it better.

DavidDavid
Following
Liked Like project

Just one more thing

To make the experience fit your profile, pick a username and tell us what interests you.

Pick an awesome username
hackaday.io/
Your profile's URL: hackaday.io/username. Max 25 alphanumeric characters.
Pick a few interests
Projects that share your interests
People that share your interests

We found and based on your interests.

Choose more interests.

OK, I'm done! Skip
Similar projects worth following
545 views
0 comments
8 followers
View Gallery
A while ago I modified my Sega Master System 2 (the one with only the RF output) and noticed that the CXA1145 Video encoding chip could output many other signals such as RGB, S-VIDEO as well as composite. which gave birth to this... a little PCB design to help make any modification to the console as neat and tidy as possible :)
More than anything though there's not much new here, all of the information is readily available online so this was more a practice laying out and ordering PCBs.
I had an idea that instead of soldering components on to the top of the CXA1145 DIP package, i could make a board so that you could socket the IC with the new components needed and a set of headers onto the main board. that way eliminating the need to solder onto the pins on the bottom of the PCB or on to the legs of the IC and making things neater.
i'm currently waiting on some PCBs i ordered so the project is still ongoing but you should be able to see already what i'm attempting to achieve :)

As you can see from the first image I had an initial revision where the PCB and the headers to the main board were nested together. However I didn't think that would leave me with enough space so i opted not to go with that and designed the board with the second design :)

The second revision included some amplifier transistors (in this case BC337s as that's what I had laying around) to amplify the supposedly troublesome s-video signal from the IC.

Currently i'm waiting on some PCBs to arrive from China that i ordered, the board house i used can take up to 8 weeks to finish boards, which i don't mind, this is only a practice project really :)

  • 4 × 220uF Electrolytic Capacitors These capacitors remove the DC offset from the Composite and Red, Green and Blue video signals.
  • 1 × 10uF Electrolytic for Audio Design only does mono from the CXA1145, which is a shortcoming when using the design in say the megadrive which has stereo.
  • 2 × BC337s or any Small Signal NPN Transistor Used for Luma and Chroma Amplification.
  • 7 × Various resistors
  • 1 × 24pin DIP/DIL narrow socket For socketing the IC on the board after salvaging from the console.

View all 7 components

  • Got my PCBs

    David • 07/01/2015 at 01:24 • 0 comments

    I happen to have my pcbs so now i'm just waiting on some headers to arrive in the post and then i will attempt the modification :)

View project log

Enjoy this project?

Share

Discussions

Similar Projects

DIY PCB – How To Create Your Own Printed Circuit Boards
Project Owner Contributor

DIY PCB - How To Create Your Printed Circuit Board

PCB designerPCB designer

A custom CC430F5137 development board with selectable operational frequency between ISM 868 MHz and 915 MHz.
Project Owner Contributor

Tiny CC430 Development Board

rampadcrampadc

Integrate the Nokia 5110 LCD into your own KiCad PCB design ..or then just create your own breakout board.
Project Owner Contributor

Yet another Nokia 5110 LCD breakout board

Sven GregoriSven Gregori

A minified replica of the Apple 1 computer
Project Owner Contributor

Apple 1 Mini

Ruud van FalierRuud van Falier

Does this project spark your interest?

Become a member to follow this project and never miss any updates

Going up?

About Us Contact Hackaday.io Give Feedback Terms of Use Privacy Policy Hackaday API

© 2019 Hackaday

Yes, delete it Cancel

Report project as inappropriate

You are about to report the project "CXA1145 Video Processor Breakout board", please tell us the reason.

Send message

Your application has been submitted.

Remove Member

Are you sure you want to remove yourself as a member for this project?

Project owner will be notified upon removal.