#zx81 — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #zx81, aggregated by home.social.
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In the future, you will have uninterrupted access to computing for one single payment of $149.95, indefinitely.
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In the future, you will have uninterrupted access to computing for one single payment of $149.95, indefinitely.
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In the future, you will have uninterrupted access to computing for one single payment of $149.95, indefinitely.
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In the future, you will have uninterrupted access to computing for one single payment of $149.95, indefinitely.
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In the future, you will have uninterrupted access to computing for one single payment of $149.95, indefinitely.
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Back in the saddle! Finished up the last part of my Timex Sinclair 1000 restoration project. The last phase is a memory upgrade from 2K to 16K. First, I popped off the existing chip to make way for the upgrade.
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Did some research on the TS1000's composite video issue - discovered that some composite mods will overdrive the output a bit, causing the washed out image.
The solution was to drop an additional resistor in-line between the composite mod board and the RCA jack. I used a 47Ω resistor since that was a value I had handy, and it worked!
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More progress on the TS1000 tonight - got the composite mod wired in and tested. It worked, but I was disappointed with the amount of noise in the video.
Went ahead with a recap and voltage regulator replacement as planned, and threw some heat sinks on the ULA for good measure. Doing so helped, although video was still really washed out.
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Finally got this Timex Sinclair 1000 project far enough along that I have something to show.
It's a PCB/rework of the ZX-Wespi-mi (the non-vga version). The ZX-Wespi is an ESP32 mod that you connect to your TS-1000/ZX-81.
You can send programs to it over WiFi using your browser.
My project combines the components and wiring into a single PCB - it's the Wespi Hat 🙂
Since it's going to be on a TS-1000, I decided that I'd mount it externally. The TS-1000 has RF shielding spray coating the interior and I'm not sure how that would effect the signal.
This first version works but has some problems that I noticed once I was assembling, so I've already redesigned the PCB to address those.
I also want to rework the wiring, and the case design needs a bit of a tweak too. This will be an evolving project 😃 #RetroComputing #Electronics #ZX81 #TimexSinclair #Sinclair #TS1000 #WespiHat #VintageComputing
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First time using this #Timex #Sinclair 1000 with the full travel keyboard as well as this cool #Panasonic black and white TV.
#VintageComputing / #RetroComputing / #TS1000 / #ZX81 / #CRT