WORKING Sinclair ZX80! restoration and cheap composite video modification

Подписаться 8 тыс.

Просмотров 2,6 тыс.

50% 1

Restoring this old classic Sinclair 8-bit computer from 1980. The machine works, but it needs a modification to get decent video output on the modern TV.
Can it load some games ?
Check out my other channel: / @tommyovesen
Support me on Patreon.com to get ad-free/early access to all videos plus sometimes exclusive content. / ovesennet
Support me by using my PCBWay referral link. You also get a 5$ discount on the first order:
www.pcbway.com/setinvite.aspx...
Find an Amiga on eBay: ebay.us/WYV79q
Find an Atari 2600 on eBay: ebay.us/jggr1t
Find an Atari 800 on eBay: ebay.us/6urb2o
Find a Nintendo NES on eBay: ebay.us/mbOlm1
Find a Commodore 16 on eBay: ebay.us/ACETRc
Find a Commodore Vic 20 on eBay: ebay.us/ZQJvaT
Find a Commodore Amiga on eBay: ebay.us/WYV79q
Find a Macintosh Classic on eBay: ebay.us/uCH0KW
Find a Commodore 128 on eBay: ebay.us/6Y9M7o
Find a Commodore 64 on eBay: ebay.us/jII9QZ
Find a TI99/4A on eBay: ebay.us/Cn30H4
Find a Spectravideo on eBay: ebay.us/SlIUF7
Find a Tandy 200 on eBay: ebay.us/c3hTsy
Find an Apple IIe on eBay: ebay.us/ikm9g5
Find an Atari XE GS on eBay: ebay.us/cNMsO0
Find an Atari 800 on eBay: ebay.us/6urb2o
I use Canva to quickly create illustrations and thumbnails. It's free. www.canva.com/join/TommyOvesen
Buy me a coffee or give a one time donation via PayPal here: paypal.me/TommyOvesen
Note: Some links are affiliate links that helps support my channel.
Music by Anders Enger Jensen, Espen Kraft, Geir Nilsskog
Patreon: / ovesennet
Web: www.arcticretro.com
Facebook: / arcticretro
E-mail: support@ovesen.net
Twitter: ovesen
Instagram: ovesennet

Наука

Опубликовано:

30 мар 2023

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 35

@alogie Год назад

There was a ZX80 at my school, but it had been upgraded to use the ZX81 ROM and had a ZX81 keyboard overlay.

@kubignol Год назад

I'm a commodore fan, but I couldn't get my eyes out of your vidéo. The composite mod was very interesting.

@Arcticretro Год назад

Great! Thanks for watching! Commodore stuff coming up..

@congestiontv Год назад

In the eightees I didn't even know this computer existed. It was not spread widely on the continent, I guess. So really nice to see how it works and can be enhanced.

@alogie Год назад

The ZX80 was originally held together with plastic pegs, but they were pretty fragile so it's not surprising to see some screws and bolts being used as replacements. 🙂

@richardradford6273 Год назад

As a kid I owned a ZX-80 back in the day. I purchased the kit to save money (the kit was $100 and the assembled version was $200) but the kits were so popular that they sent me the assembled version for the same price. I absolutely loved playing around with it. Learned a TON about programming and computers in general. I eventually sold it to a friend and upgraded to a VIC-20.

@david4368 Год назад

I had a ZX-81 kit that I built. It worked, but was very annoying to use. I later got a Commodore 64 and I was much happier.

@Arcticretro Год назад

Yes, these machines are horrible to work on

@neakmenter Год назад

I loved my zx81 never had a zx80 but kinda always wanted one - I thought the White case looked like a star wars stormtrooper in a way... always played jk greyes software gamestapes on the zx81. good memories!

@Arcticretro Год назад

Thanks for the comment :)

@force4200 Год назад

Great work Tommy nice to se it running :)

@Arcticretro Год назад

Thanks Robert :)

@gertsy2000 Год назад

Well done. A great restoration and mod.

@Arcticretro Год назад

Thanks :)

@coxyofnewp Год назад

I remember looking at the ZX80 in a electronics shop when I was very young and thinking WOW so small and it was a computer !! Totally blew me away ! Great video, really enjoyed it.

@Arcticretro Год назад

Thanks!

@lubricatedgoat 3 месяца назад

My first computer. Also my biggest sale regret.

@Arcticretro 3 месяца назад

You always regret selling stuff. I regret selling my first C64, my first mobile phone, my first iPhone also :) I never sold my first Amiga.

@stefanweilhartner4415 Год назад

i think you need to decouple the dc offset of the output with a capacitor.

@Arcticretro Год назад

Yes, I think something like that too

@peteoconnor7576 Год назад

Nice video Tommy. That's a better composite image than the one I get on my ZX81.

@Arcticretro Год назад

Thanks 👍 But it's a bit unstable

@miked4377 Год назад

nice!

@Arcticretro Год назад

Thank you! Cheers!

@MichelBeaussart Год назад

Excellent Video - How did you fix the video output problem afterwards?

@Arcticretro Год назад

I did not do anything. The TV just accepted the signal sometimes. Sometimes not.

@thebyteattic Год назад

Always a very nice video to watch you go through the process. These resistor values work: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-T-e69z4R1tA.html. If you test by adding an extra resistor in parallel to a pre-existing one, the resistance can only decrease. Resistors are the opposite of capacitors: in parallel reduces impedance, in series increases impedance.

@Arcticretro Год назад

Thanks for the comment. I still think there is a problem with the sync to my modern TV. I tried a diode on the output, but still problematic