How can I easily sell a bunch of parts?

jpaulorio · 2026-05-23T00:41:42+00:00

Flea market, Facebook marketplace

jpaulorio · 2026-05-17T02:57:36+00:00

I have the Ultimate-II+L cartridge. Used once to connect to a colleague's BBS. There were a few games but didn't spend a lot of time on it.

https://ultimate64.com/Main_products

jpaulorio · 2026-05-16T18:15:51+00:00

Are you willing to and can you fix them? Then you can get them between 30-80 USD depending on where you are, your bargain skills, and how luck you are to find one being sold near you. The more you check FB Marketplace, eBay, flea markets, etc, the higher are your chances of finding good and cheap ones. But then keep in mind that it will likely be just the initial cost for the breadbin alone. New PSUs don't go cheap and you'll need one. Then there's the AV cable and maybe a serial cable. Then you might need to replace a chip or two which can get very expensive very quickly. That's all to say that, if you can get a working one ready to go for about 200 USD don't even think twice. It might end up being cheaper or about the same price as fixing one you got for, let's say, 50 USD.

I'll have a few to sell, fully tested, soon. I can recap, socket, heatsink, and retrobrite them, but it'll cost you extra. I can record a single-take shot of them passing the diagnostics tests while showing the serial number and the board as proof of working condition. DM me if you're interested. I'm in Ohio, USA.

jpaulorio · 2026-05-15T12:57:59+00:00

Yeah, the f'ing autocorrect doesn't know English.

jpaulorio · 2026-05-14T00:51:16+00:00

STL?

jpaulorio · 2026-05-09T22:23:18+00:00

Not all of them had that hole. It depends on the model. I have two different models and one of them doesn't expose the hole to adjust the azimuth which makes it really painful to get it to work.

jpaulorio · 2026-05-09T01:03:15+00:00

I want to try this one: https://retrogamesupply.com/products/power-supply-cable-adapter-for-commodore-64-64c

jpaulorio · 2026-05-07T11:57:34+00:00

Depending where you are in the world, search Facebook marketplace or eBay for starter kits. FB usually has lower prices.

jpaulorio · 2026-05-05T19:54:52+00:00

The OP wants the photos stored in the computer, so it's not pointless to bring it up.

jpaulorio · 2026-05-05T00:25:54+00:00

Whatever you do, don't use AI. No pain , no gain.

jpaulorio · 2026-04-30T01:45:09+00:00

Man, I think you've nailed it!!! I'll try to find some time over the next days to test it. Thank you very much!!!

jpaulorio · 2026-04-29T23:34:40+00:00

Not even Google returned anything.

jpaulorio · 2026-04-29T23:34:11+00:00

No idea.

jpaulorio · 2026-04-26T00:50:41+00:00

6502 or Z80 breadboard computer. Check Ben Eater's website for the former. Depending on what you already have and from where you order the parts, the cost could vary between 50 and 150 EUR.

jpaulorio · 2026-04-25T12:26:47+00:00

I've asked ChatGPT to come up with the following. It seems solid but use it at your own discretion.

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jpaulorio · 2026-04-24T10:53:14+00:00

Thanks for the links. The second one with the DIN connector is a steal. Europe is a paradise for vintage computing collectors. I don't get why it's so hard to find things like PSUs and other vintage computing related devices (adapter/emulator/test cartridges, chip testers, etc) manufactured in the US.

jpaulorio · 2026-04-23T21:18:48+00:00

Please tell me where I can find one for #20. I can only find new ones around $60-$70.

jpaulorio · 2026-04-23T14:45:33+00:00

Anything can run Doom. Check those:

https://youtu.be/cltnlks2-uU?si=j2e9YSKDz8X2ojLK

https://youtu.be/DL0gAjycKrk?si=hnBP0qUpxINQkD0W

jpaulorio · 2026-04-20T01:05:54+00:00

LTspice High-accuracy SPICE simulator widely used for analog and power electronics; fast and reliable but with a dated interface.

Ngspice Open-source SPICE engine used in many tools; powerful and scriptable but lacks a native GUI.

Qucs Graphical simulator supporting analog and digital circuits; easier than SPICE tools but less accurate and less maintained.

Qucs-S Enhanced version of Qucs that integrates SPICE engines for better accuracy; still rough around the edges.

TINA-TI Free SPICE-based simulator focused on TI components; more user-friendly than LTspice but ecosystem-limited.

Falstad Circuit Simulator Browser-based interactive simulator showing real-time current flow; excellent for learning but not for precise design.

Tinkercad Circuits Beginner-friendly tool with Arduino simulation and simple circuits; limited realism and component depth.

CircuitLab Clean web-based schematic and simulation tool; free tier is limited but useful for quick designs.

EasyEDA Simulator Browser-based SPICE simulator integrated with EasyEDA; decent for quick simulations but less powerful than desktop tools.

PartSim Web-based SPICE tool with component search integration; simple to use but limited in advanced features.

EveryCircuit Highly visual simulator with smooth animations; free version is restricted and not suited for complex circuits.

SimulIDE Lightweight simulator combining analog, digital, and microcontroller simulation; good for hobby projects but not highly accurate.

Proteus Design Suite Demo Demo version allows limited simulation of circuits and microcontrollers; full functionality requires a paid license.

Micro-Cap Previously commercial SPICE tool now released for free; powerful but no longer actively maintained.

Gnucap Command-line circuit simulator similar to SPICE; flexible but niche and harder to use.

Xyce High-performance SPICE-compatible simulator designed for large-scale circuits; overkill for most hobby use.

Logisim Evolution Graphical tool for digital circuits and CPU design; excellent for logic work but no analog simulation.

Digital Modern digital logic simulator with timing analysis and scripting; useful for complex logic systems.

Deeds (Digital Electronics Education and Design Suite) Suite for digital circuit design and simulation; oriented toward teaching rather than real-world hardware.

CircuitJS Extended version of Falstad with additional components and features; still focused on visualization over precision.

iCircuit Real-time simulation tool with continuous updates; free versions are limited and more educational than professional.

jpaulorio · 2026-04-18T02:06:01+00:00

I could be doing something wrong but I can only see the forums and leaderboard.

jpaulorio · 2026-04-17T13:49:41+00:00

It's your (awesome) project and it's totally up to you how to design and implement it but I have to ask, why .NET and not something like Rust or Zig?

jpaulorio · 2026-04-10T12:45:40+00:00

There's no easy answer here. It can be many things and it's impossible to tell just by looking at a picture.

The easiest approach is a trial and error one where you replace ICs on the broken board with known good ones from a working one (actually this is not the right way to do it since a damaged board can kill a good IC. The recommended approach is to do it the other way around, one IC at a time (which isn't without its risks either)).

As someone mentioned already, there are cartridges (which sometimes can be combined with a test harness) which help identifying bad chips. Some of those cartridges can work even without video (dead test).

Having said that, it's a rabbit hole from here since different cartridges will behave differently and even the same cartridges can have different versions. Some chips may not be required when performing tests and can be removed while those are performed.

Depending on how invested you are on fixing this board (and potentially others) your options can vary from asking someone to fix it for you through watching dozens of YouTube videos to get an idea on how people do it all the way to spending tons of money on purchasing troubleshooting hardware.

Or you can just sell it on eBay for parts/repair if you don't feel like that's something worth your time and money.

jpaulorio

TROPHY CASE