TheRetroChannel | Simple Tandy Color Computer S-Video (and composite) mod #SepTandy @TheRetroChannel | Uploaded September 2021 | Updated October 2024, 1 hour ago.
Time to revisit the S-Video mod for the CoCo1 and simplify it to the max! We'll also take a look at video signals in general and the difference between the PAL and NTSC CoCos.

🛍️ Tindie store: tindie.com/stores/theretrochannel
🛠 Tools and kit: patreon.com/posts/tools-and-kit-77570017
💬 Discord: discord.gg/393FYaM6gM
😎 Ad-free, early access: patreon.com/theretrochannel

This new mod requires just 4 components and basic soldering skills, here's what we need:

1x 470ohm resistor
1x 2n2222 NPN transistor
1x 220uF capacitor (6.3v or greater)
1x 0.47uF capacitor (6.3v or greater)

We'll also need some RCA/S-Video cables, and an S-Video to composite adapter (optional but recommended on NTSC systems for colour artefacts) you can build your own adapter by connecting a 470pF capacitor between the chroma and luma output

Circuit: imgur.com/a/2718EFL

🎞
0:00 Intro
2:34 Parts Required
5:04 The Plan
8:33 Separating the Luma and Chroma
11:53 No RF Shields
15:23 Making Space
16:55 Routing Cables
19:24 Installing Components
26:25 Wired for Sound
32:48 Results
39:15 Little adjustments (for PAL)
43:15 NTSC vs PAL
45:00 Composite
47:02 Outro
🎞

🔗
CoCo Color Bars: colorcomputerarchive.com/repo/Disks/Demos/Coco%20Color%20Bars%202020%20(Jason%20Reighard).zip
Memz Demo: colorcomputerarchive.com/repo/Disks/Demos/Nyan%20Cat%20(Ciaran%20Anscomb).zip
🔗

Thanks for watching!

#SepTandy2021