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Old Jul 20, 2015, 11:08 AM
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The Build Your Own Oscilloscope Thread

A couple of us ordered kits to build scopes, and we want to compare and contrast and chit-chat about what we can do with them. If you're building a scope from a kit or even repairing a manufactured scope, join us!

I ordered this kit: https://www.sparkfun.com/products/12848
  • 9VDC power supply voltage
  • <280mA current draw
  • 5M samples/second (AUTO mode only)
  • 8 bit resolution
  • 256 sample memory depth
  • 1MHz analog bandwidth
  • 100mV/Div-5V/Div sensitivity
  • 1MΩ impedance
  • 50Vpeak-to-peak max input voltage
  • DC/AC coupling
  • Save and display up to 6 captures to memory
  • Transfer screen capture to PC as a bitmap file (serial adapter not included)
  • Backlit LCD display
  • BNC Connector

It seems pretty capable for $60.

OK, here's the build video!

Sparkfun JYETech oscilloscope build (8 min 46 sec)
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Last edited by jasmine2501; Jul 22, 2015 at 11:51 PM. Reason: Added build video.
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Old Jul 20, 2015, 11:12 AM
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Thanks, Jas, going to sit here and learn stuff!
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Old Jul 20, 2015, 11:42 AM
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Subscribed, I don't have an Oscilloscope or a kit but I'm interested.

I've considered trying to get an old analog Textronics 475 dual trace oscilloscope. I used them a lot in 20 years as a Navy Electronics Technician. Unlike a lot of folks I have no problem manipulating a analog scope. They turn up on E-Bay at a decent price all the time. I've bid before but not over aggressively. If I could get one for less than $200 I'd be happy. I even have access to a calibration laboratory that could do a quick once over and test for me.
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Old Jul 20, 2015, 11:45 AM
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I should get my kit today or tomorrow, and I'll do some videos about it. That's kinda my style

I'll do a video about how to assemble it and make sure it's working right, but I'm looking for ideas on what kind of things to show with it. I'll definitely do a video about the PWM standard for receiver output, and maybe test some common household signals like remote controls and whatnot. And then, I will attempt to make a setup to show signal processing latency in RC systems with a single trace, but I honestly don't think that's going to work - I expect to see an unintelligible mess. So, any other ideas for videos would be appreciated! Maybe something with a gyro?
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Old Jul 20, 2015, 12:47 PM
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I have subscribed too!

This will be very interesting.

I did build one as a kid, not a kit either. It was mostly made from bits from an old TV.

I have posted that already, here is the link to it:

http://www.rcgroups.com/forums/showp...&postcount=140
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Old Jul 20, 2015, 05:50 PM
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Anyone remember HeathKit? Apparently they are trying to get started again? This web site looks promising! I was a subscriber to their catalog, but I never could afford much from it. I bought some little electronics kits but never could afford the really cool stuff.... anyone ever build that hovercraft, you think?

https://www.heathkit.com/heathkit.html

I also had this book, but I never could get the parts for any of the projects in it: http://www.amazon.com/Build-Laser-Ph...7432507&sr=1-3
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Old Jul 20, 2015, 06:38 PM
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Quote:
Originally Posted by jasmine2501 View Post

I also had this book, but I never could get the parts for any of the projects in it: http://www.amazon.com/Build-Laser-Ph...7432507&sr=1-3
I want the light sabre!

Trained in Iai, Japanese sword. Have a real Katana I train with on the basis that if I make a mistake I will cut myself. That focuses attention and so I don't make mistakes.
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Old Jul 20, 2015, 06:51 PM
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Originally Posted by nagas View Post
I want the light sabre!

Trained in Iai, Japanese sword. Have a real Katana I train with on the basis that if I make a mistake I will cut myself. That focuses attention and so I don't make mistakes.
Have you seen the photos of the guy who put his katana away incorrectly - through his whole arm... he said it slipped through his arm and out his elbow before he felt anything.

So... I don't mess with swords, I prefer guns.

That book was real weird, I wonder if it's still in my mom's basement somewhere. I could probably build most of the projects these days, but I was totally baffled by some of the plans when I was younger.

I also had a book about how to make holograms, which I couldn't accomplish either because I didn't have a laser, but my science teacher did, and he also had a copy of the book. I was super surprised when I came into class one day and saw a familiar layout, I knew exactly what it was right away! He managed to make a few holograms and it was really cool.
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Old Jul 20, 2015, 07:51 PM
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I have not seen the photos, but understand how that may have happened.

When you return the Katan to the scabbard, you run the back of the blade along the web between your thumb and first finger to position the tip in the mouth of the scabbard without scraping the blade on the metal ring that surrounds it. You then drop the blade through the gap between those digits into the scabbard, guiding it in. If he was not focused, he may have misjudged.

The coolest hologram I ever saw was in a shop that specialised in them in Oxford, UK. It was a telescope pointed up at a window with a very attractive young lady. The telescope was sticking out the hologram into the shop. When you looked through the telescope you actually saw the image that it was forming. You were literally looking through the holographic telescope. The young lady in question was disrobing! I wish I had bought it but at that time I was a poor student. Quite amazing that the hologram was able to record the image that the telescope was producing.
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Old Jul 20, 2015, 07:53 PM
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That IS cool... I wonder how that's possible.

Hehe, I found out this scope has FFT function - so I could do some frequency analysis, which is always cool.
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Old Jul 20, 2015, 07:57 PM
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That IS cool... I wonder how that's possible.
Because a telescope produces a real image. It take the light entering the front lens and that light exits at the eye piece. The holographic process is able to capture that light, that real image. But yes, it was very cool. I so wish I had bought it.

Edit:

In fact there is one here, not the one I saw but similar (although that may well be the one). And I STILL cannot afford it, but I am very tempted. Part of my lost youth! About half way down the page:

http://drie3d.home.xs4all.nl/English...cials%20BU.htm

Also here is a YouTube video that show the same thing. No lady this time, stars:

Telescope Hologram (0 min 24 sec)
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Old Jul 21, 2015, 12:18 AM
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Lol, OK... I guess my kit has been sitting in the mailbox all day. Wish I knew that before I spent the evening watching TV...

Anyway, it's a baggies of parts, like most of these kits. It's a lot of parts, gonna take a while to assemble I think. I'll start tomorrow I guess
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Old Jul 21, 2015, 11:05 AM
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I took a quick photo of the parts, I think this will be easy to build. It's all very straightforward. Just need to pick up a new tip for my soldering iron.

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Old Jul 22, 2015, 09:56 AM
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Quote:
Originally Posted by nagas View Post
Because a telescope produces a real image. It take the light entering the front lens and that light exits at the eye piece. The holographic process is able to capture that light, that real image. But yes, it was very cool. I so wish I had bought it.

Edit:

In fact there is one here, not the one I saw but similar (although that may well be the one). And I STILL cannot afford it, but I am very tempted. Part of my lost youth! About half way down the page:

http://drie3d.home.xs4all.nl/English...cials%20BU.htm

Also here is a YouTube video that show the same thing. No lady this time, stars:

http://www.youtube.com/watch?v=a6qGaQ-_0F8
Neat!
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Old Jul 22, 2015, 09:57 AM
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Quote:
Originally Posted by jasmine2501 View Post
Anyone remember HeathKit? Apparently they are trying to get started again? This web site looks promising! I was a subscriber to their catalog, but I never could afford much from it. I bought some little electronics kits but never could afford the really cool stuff.... anyone ever build that hovercraft, you think?

https://www.heathkit.com/heathkit.html

I also had this book, but I never could get the parts for any of the projects in it: http://www.amazon.com/Build-Laser-Ph...7432507&sr=1-3
This'll keep ya busy for awhile.
http://www.amazing1.com/
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