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Basement Shack Seeks Scope

A project log for Model 100 Basketcase

Try to resurrect a vintage Radio Shack TRS-80 Model 100 computer

john-verneJohn Verne 01/23/2016 at 14:232 Comments

Wow, two Skulls and a like and a mention on the @Hackaday Twitter! This is the most internet famous I've ever been.

I should probably follow through on this rather modest project...

So, I'm shopping for an oscilloscope, and my budget and needs will probably be more than satisfied by something like a BitScope. I'm not sure what probes I'd need, though. I think I can get away with the 60 MHz 10:1 probes? If the 60 MHz refers to sampling rate and 10:1 refers to signal voltage amplification...? Given this project is somewhere around 8MHz at TTL levels.

In an effort to leverage the community, consider this a request for any comments or advice regarding this or any other 'scope choices. My budget is tight, and while I have some access to local second-hand gear, I might not have the skill to know if the gear was any good.

It's like my DMM: I'd love to be able to afford (or justify) a Fluke like my engineer friends. But I can't really, so I got a decent mid-priced college special. Is there such a thing in the oscilloscope market?

Discussions

Matt Mills wrote 01/23/2016 at 18:18 point

I'm not sure what you're doing, exactly, but you may be able to get away with a logic analyzer: http://www.seeedstudio.com/depot/Logic-Pirate-p-1750.html

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John Verne wrote 01/24/2016 at 01:49 point

I'm working my way through the repair manual troubleshooting tree. I've checked basic voltages present at the various places, and now they want me to scope the inputs to the display board. A logic analyzer will probably not go amiss, though.

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