Part 2: http://www.youtube.com/watch?v=weJ4JdFat8o
Part 3: http://www.youtube.com/watch?v=4pwI2NebT90
An unusual oscilloscope phenomenon!
UPDATE: Please stop guessing. It is NOT the chair, it is NOT the noise, it is static electricity. And no it is NOT caused by the ground probe loop. See the Part 2 and Part 3 video where I prove that.
Part 3: http://www.youtube.com/watch?v=4pwI2NebT90
An unusual oscilloscope phenomenon!
UPDATE: Please stop guessing. It is NOT the chair, it is NOT the noise, it is static electricity. And no it is NOT caused by the ground probe loop. See the Part 2 and Part 3 video where I prove that.
I figured this out without a scope, my monitors would turn off when I got out of my chair…
Very interesting video
now I can show off my knowledge to my friends
You’re basically just creating a simple loop antenna.
The good ol days
Did you know that coax self generates glitches and noise ? Just wiggle a coax connected to a scope turn up the RF intensity the energy in the open space , the scope will indicate the signal NO NEED to stand on a chair.
discovered that long long time ago, and much before I decided to give it a try on youtube. But it's fun to watch a video recorded 10-15 years ago, and a video format from that time.
is there an actual 1meg resistor in the input of scopes? 2 significance of the chair -climbing?
Hahahaha you look so young compared to what I'm used to!
2020
The resonator is most probably the shorted probe, not the cable, that is a transmission line. The spark that generated the input is oscillatory too.
Are you saying "crow probe"?
I am a technician at AE Techron and we had a customer complaint about glitches seen at the output of our 7224 Amp when being driven by an AE Techron 3110A signal generator. I was noticing that static could cause glitches. or turning on or off other test equipment on my bench. Or some one turning on a microwave . or me standing up quickly out of my chair. I do have a static strap that I use when working on the amp but at that time I just sat down and then stood back up and wow another glitch appeared on the scope. my scope is a Lecroy LT374L which is a 4 ch color 500mHz scope. and I love it. I was also suspecting glitches occuring from air compressor kicking on and or refergerator microwave hot water heater exc.
SO I put a very good EMI filter on my scope and that helped. but still not fixed. then I put a 10nF cap between common and ground of the amp and that further helped. Now I can turn on the flourescent lights at my bench without causing a glitch. But if I turn on a HP 33120 signal generator I still get glitch. I wish i would have seen this video earlier this week.
I spent most of the week on this problem. Because a customer didnt want to buy our product with these glitches that may occur 1 time per hour if not much is going on.
Great Scott. This is on my feed a decade later. Finally!! Time travel. See you again in 10 years.
a Wavelet 🙂
Nothing is for ever as it is in Fourier. Glitch=Wavelet in this case Mayer or Ingrid Daubechies non-symmetrical wavelet – in a Wavelet spectrum it would appear as a single shot at del.t and "frequency" if one can say that in a Wavelet type spectrum display. Great for displaying "glitch" if the "shape" of the glitch is known. Unlike unrealistic Fourier will work only on continuous sinusoidal that go on for ever – there is your "new" trivia. I like your work keep it going – I am viewing all your blogs as I am impressed with a practical aspects. //Nick
Hallo Dave, I haven't seen all your 1000+ videos yet, but after watching this video:
looks like all these fancy ESD shoes, mattes and hand bracelet's do little, when one's clothes have lot's synthetics. It appears like a wrong fabric or even parts of it can generate enough ESD voltage and accidentally kill one's circuit.
What clothes do you suggest to wear when playing with circuits?
2019
Buahahhahahahhaha, you were so young! 😀
(Ops – we were… 😉 )
Still procrastinating after all this time… he says he will show something and then… sidetrack… then say he’s going to show it… then sidetrack… for ages lol 😂
Tinfoil between leads creates antenna picking up only alien broadcasts…
get yer big stupid face out the camera ye freaky bastard
We've come a long way…
Could you please make a video titled "What are the things to look for when you purchase an old analog oscilloscope?"
I love your videos, but I would suggest you to make them shorter. I guessed right from the start though. I would make the video only 2 minutes.