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Oscope options??

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jknightandkarr
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Oscope options??

Postby jknightandkarr » Fri Jun 19, 2015 3:51 am

I am concidering options for an oscope n thinking of 3 ways n wanted everyones opinions
1) Something like this http://www.amazon.com/gp/aw/d/B00YZWF2J ... oscope+kit
2) Trying n building my own Propscope
3) Trying to fine a seriously cheap one on ebay amazon ect either stand alone or a pc used model either would work.
4) ok i can add a 4th if i could get once in a life time lucky n score a very unlikely freebe or one that might need some repairs or something.. Highly unlikely option.

Just looking for anyones opinions on this, the easiest would be #1 but since i am kinda not really able to have much "play time" cash, #2 n build my own prop scope n gather parts little at a time.

Joe
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Re: Oscope options??

Postby chuckt » Fri Jun 19, 2015 8:14 am

$25 is a nice price but it is suited for music or maybe slow chips and you might want to put that money on another type of unit. For a CPU like the 6502, "the sample rate needs to be AT LEAST ten times higher than the CPU clock frequency and ideally better than 20 times the CPU clock frequency..."

http://forum.6502.org/viewtopic.php?p=38387#p38387

You might do better with a Logic Pirate for $30:

http://dangerousprototypes.com/docs/Logic_Pirate

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Re: Oscope options??

Postby jknightandkarr » Fri Jun 19, 2015 3:00 pm

chuckt wrote:$25 is a nice price but it is suited for music or maybe slow chips and you might want to put that money on another type of unit. For a CPU like the 6502, "the sample rate needs to be AT LEAST ten times higher than the CPU clock frequency and ideally better than 20 times the CPU clock frequency..."

http://forum.6502.org/viewtopic.php?p=38387#p38387

You might do better with a Logic Pirate for $30:

http://dangerousprototypes.com/docs/Logic_Pirate


Ok thanks i will check out more of those kits and see if i can find one where the sample rate is 10 to 20x the clk freq. Has anyone ever built their own propscope?

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Re: Oscope options??

Postby chuckt » Fri Jun 19, 2015 3:16 pm

Or you can buy one of these but I am guessing that it is a clone and not the real thing. As far as I know, the software is free but maybe you would want to double check.

USB Saleae 24 MHz 8 Channel Logic Analyzer Latest Support 1.1.15

http://www.newegg.com/Product/Product.a ... 2V51F26825

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Re: Oscope options??

Postby jknightandkarr » Fri Jun 19, 2015 3:19 pm

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Re: Oscope options??

Postby jknightandkarr » Fri Jun 19, 2015 3:29 pm

chuckt wrote:Or you can buy one of these but I am guessing that it is a clone and not the real thing. As far as I know, the software is free but maybe you would want to double check.

USB Saleae 24 MHz 8 Channel Logic Analyzer Latest Support 1.1.15

http://www.newegg.com/Product/Product.a ... 2V51F26825

Heck Saleae's website says its no longer available. Maybe clearance? Whats diff between logic analyzer n o scope?

Chris, unless i am mistaken dont you have this logic analyzer?
Joe
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Re: Oscope options??

Postby Savage///Circuits » Fri Jun 19, 2015 4:02 pm

Hmmm, I guess that answers the question of whether anyone actually watches any of the videos I did. It seems like I answered that very question here:

https://www.youtube.com/watch?v=4KnOPod95xk
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Re: Oscope options??

Postby jknightandkarr » Fri Jun 19, 2015 7:14 pm

I will watch that tonight. i have had bad service n couldnt view vids but i can now.

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Re: Oscope options??

Postby chuckt » Fri Jun 19, 2015 7:58 pm

Chris,

I myself learned Basic at home, took BASIC in high school and then college again because the college didn't respect my learning in high school or at home and didn't care if I could pass a proficiency test in BASIC. I learned PASCAL and then ran out of money and concentrated more on passing college than programming courses.

I bought "C For Dummies" and realized that book was worse than my professors in college who didn't teach but shoved a computer in front of us instead and told us to learn for credit. I was reading "C For Dummies" in front of me and realized that the book wasn't answering all of my questions about the language. This doesn't shock me because I had to buy books to learn Pascal in college because one book or teacher couldn't explain it all.

A lot of these tutorials on the web fail because the teacher assumes because they or their readers know something that we should know it and there are gaps that we don't know so we can't complete the tutorial. And then there are these arrogant people on the message boards that say they learned it so we have no right to say we haven't learned it even though it is up to me to learn it.

Teaching is more than throwing facts at people. When I went to a really good college, the professor would never explain it the same way again if we said we didn't get it. The reality is that for the last eight years or more, I have accumulated half a dozen or more microcontrollers with the hopes that someone would teach. People ask me what I want to do and then proceed to give me the wrong microcontroller that probably won't give me the quality of what I want to do. If I went to college, I would learn in two or four years and instead I have to wait for mail order, people to answer my questions on the web, a tutorial. I have to get new tools or microcontrollers because the person offering to teach uses something different or the tool doesn't work. I've gone down a lot of bunny trails to know that it doesn't lead anywhere. My accounting teacher said we had to learn now in class because no one will teach us what to do on the job and learning microcontrollers is not any different on the message boards or in public. The reason why my relatives don't want to learn electronics is because it takes a lot of time and costs a lot of money but there is more; you have to master multiple programming languages, engineering, wiring, circuits and components and then there is software. So since I had to help a lot of people in college with basic programming, there is no way in hell that a lot of people will learn electronics because it involves a lot more time and knuckleheads who just want us to purchase their kit so we can wire it and put it together on the internet and not learn anything and there will always be gaps in our learning.

I'm not at that level to use a scope or a logic analyzer yet because I've been reading for eight years and haven't had the time to get started because I'm always interrupted and then there was the cost of saving up for another starter kit that wasn't a starter kit.

I want to watch your videos but I will have go treat it as a college course where I go buy notebooks and take notes and I will take it as a three credit class.

Thanks for your videos and all of your work. I believe I will learn something here.

Chuck

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Re: Oscope options??

Postby jknightandkarr » Sat Jun 20, 2015 3:52 am

Chris, Watched your video and it helped me understand what it is n what they both do. Thanks!

Joe
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