this post was submitted on 30 Sep 2024
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Retro Gaming

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I learned about these neat USB boards. I think I will use one in 9V mode for the Atari 7800 as an alternative means of powering it. It might fit in one of the existing cutouts.
#retrogaming #atari #atari7800

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[–] SpaceMan9000@lemmy.world 5 points 1 month ago (3 children)

Seems pretty neat, got any more info?

[–] Shadow@lemmy.ca 3 points 1 month ago (1 children)

Just search aliexpress for "pd trigger" and they're pretty common.

You can also get usb c to DC barrel jack cables, that come preconfigured for various voltages.

[–] SpaceMan9000@lemmy.world 2 points 1 month ago

I actually used the DC barrel jack one to power some fans. Genuinely think that I was using too many words while searching aliexpress.

Found them now, guess they'll come in handy soon, thanks!

[–] root42@chaos.social 1 points 1 month ago

@SpaceMan9000@lemmy.world Just search eBay... They are really straight forward. Bridge the solder jumpers, measure the pads to see if it worked -> done! :)

[–] cubism_pitta@lemmy.world 1 points 1 month ago* (last edited 1 month ago)

I was curious myself so I looked up the data sheet fro the chip... I need this board in my life

https://www.laskakit.cz/user/related_files/ch224ds1.pdf

Edited: Found this project as well

https://electronicsworkshops.com/2023/12/25/usb-power-delivery-decoy-ch224k/

I don't understand the reference between VBUS and VDD. Is anyone willing to explain how the risk of putting direct PSU voltage into the output device is avoided?

[–] cubism_pitta@lemmy.world 2 points 1 month ago (1 children)

This is great. Even just soldering on a barrel jack and shrink tubing the whole thing would be a massive improvement.

All the old Power Supplies from the 90s and earlier made power really inefficiently and their failure modes can be... bad

Putting a GOOD USB-C charger onto these old systems is an elegant solution!

[–] Shadow@lemmy.ca 2 points 1 month ago

They sell premade usb c to DC cables in a variety of voltages.

https://a.aliexpress.com/_mKTitLK

[–] apzpins@mstdn.games 2 points 1 month ago

@root42@chaos.social Whoa, this makes turning old things to USB PD powered dead easy!

[–] nazokiyoubinbou@urusai.social 1 points 1 month ago

@root42@chaos.social Neat. Seems like this could be useful for quite a lot of things.