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EEVblog #785 – Sydney Maker Faire 2015 Interviews

EEVblog #785 – Sydney Maker Faire 2015 Interviews

Interviews with various people at the 2015 Sydney Mini Maker Fair: Eora3D 3D Laser Scanner ...

  • Jeff


    Unemployed? How come? Trying to make a full-time occupation from video blogging now or going freelance design?

    Best of luck in your endevours whatever they may be.

  • Lisa

    Hi Dave,
    Best of luck. I noticed the contest rules state the video be between 1 and 5 minutes long, yours is nearly 10. I wonder if the judges will consider it? That aside, as a young player I found it very interesting.

    • http://www.eevblog.com EEVblog

      This is the directors cut. The uploaded contest one was just under 5 min.

  • http://www.elvtechnology.com.au Shaun Clarke

    Couldn’t it be called cheating to have multiple votes from the same person?

    • HammerFET

      Well they let you vote everyday so not really cheating…

      Either way, everyone make sure they vote and Dave will have this easy!

      Or at least beat the dude who shows how to measure the voltage of a battery with an oscilloscope… ‘¬_¬

    • http://www.eevblog.com EEVblog

      Not cheating, they actually allow that. One vote per IP address per day!

  • Nick

    It’s not cheating, it’s devotion…

  • Drone

    He he… One sure way to win Tektronix contest is to submit the video showing the same probe tapping phenomenon, but use the Agilent scope and probe instead!

    Or maybe the Agilent kit doesn’t do it?

    Younger Players indeed; hurrumph…..

    • http://www.eevblog.com EEVblog

      The fixed x10 Agilent probes do it too. As do all my other brand probes.

  • PedroV

    Hi Dave!

    Best of all luck with you professional future!
    I would like to ask a thing from you:
    Now that ‘you are free’ can you maybe dig deeper in the PCB Design?!
    I believe you have a lot to tell us and we a lot to learn.. :)

    Best of all luck!

    • http://www.eevblog.com EEVblog

      Yes, I have plans on doing that. Sadly though, even though I have a lot more free time to work on stuff, it’s still not nearly enough!

  • Dimlow

    Duh! Its the switch in the probe!!!!

    My HP probes don’t have a switch and I don’t get this effect.

  • Morten Larsen

    I would be nice with a recurring donations option on your donate link now that you are a full time blogger.

    Keep up the great work.

  • FreeThinker

    Router reboot…….Router reboot……Lol

    • Colin

      it is not the switch, how could a contact between similar metals generate an EMF? Microphony in ceramic capacitors is well known, as is the triboelectric effect in cable. Broadcasters know about this. It’s an easy mistake to make, if you don’t have wider knowledge of many industries and applications.

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  • inse

    Dave, do you really think this effect is relevant in practice?
    I can hardly imagine bumping around the probes while measuring.

    BTW, is it your tedious 1012 or TDS1012 scope?


    • http://maggidev.com Ben

      Dave you have something unique going on here, it’s about the attitude of the show, I think you pretty much got the hang of it when you did the arduino review, I which you talked about the new generation of “hackers”, there’s a new identity growing behind this community and I think is people like you that is making it happen.
      I’m not making any comparison here but most of us have at least read one or more Stephen Hawking’s books, he’s the guy who got an entire new generation of people interested into cosmology, just like string theorist are doing it the field of physics.
      You and many other people like you are doing just the same with the electronic enthusiasts community.
      I think you’re making the right choice by hanging on to the show, best of luck !


    • http://www.eevblog.com EEVblog

      Dave, do you really think this effect is relevant in practice?
      I can hardly imagine bumping around the probes while measuring.

      I’ve seen it happen on rare occasions. Some probes are lot more sensitive to others.
      The ESD problem I showed in a early blog is much more likely to happen though.

      BTW, is it your tedious 1012 or TDS1012 scope?

      That did sound a bit NZ didn’t it? :->

  • http://jonw0224.tripod.com Jonathan Weaver


    I’ve been following for about a year. I wish you the best of luck on your professional endeavors. Thanks for doing this blog.

    Wish you the best,


  • huh


    Dave, now please connect a couple of those probes to an audio amplifier and play a drum solo:)

  • Florian

    On my Rigol DS1052E the effect is barely noticeable with like <50mV Vpp

  • Rasto

    I’ve clicked on the link for Vote, and for some reason I automagically gave vote to that RS323 chick. It gave me no option to choose where my vote should go. I think it’s better to ask people to click on Vote button on that page instead of providing #Vote link, which probably randomly chooses video.

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  • Crapouille

    Hi Dave, very interesting and important post. I’m just a computer science engineer but one week ago, a teamworker of mine told me that he realized that some capacitors have a piezo effects. Shake it and u obtain a signal ! It’s due to the (cheap ?) material used (sorry I cannot remember its name). So it’s important to know that if u realize some embedded cards who can vibrate (typically DC motor controllers …)

  • http://darknet.co.za Wesley

    Hi Dave, I always enjoy your show! I’m not an electronics engineer by any means, but a software one, only dabbling in electronics every so often.

    Reading @Rasto’s comment I voted via the main site and not the link given, seems like the RS232 video has quite a few accidental votes, oops!

    Best of Luck!
    Wes, South Africa

  • http://simf1.blogspot.com/ Kubing

    you will beg to die rather than make it manually

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  • vk6zgo

    Hi Dave,

    Most of the other entries are pretty much in

    the “well–duhhh!” category,but yours & the RMS

    measurement one are the most interesting.(I’m

    pretty sure I’ve read something about the

    latter back in the “dreamtime”!)

    The RS232 lady lost me halfway,but then,I don’t

    have a DSO.

    The DC voltage bloke has just discovered what

    most people fixing stuff with an oscilloscope

    have,in that it’s quite easy to check dc levels

    as you go,without changing instruments.

    I have seen the effect you describe,but never

    thought to investigate it.

    My vote goes to you,although the RS232 lady is

    much better looking.


  • Raff

    Good on you Dave, hope your new career goes well! You have my vote!

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  • vk6zgo

    Well,today the RS232 lady & the keyfob bloke

    are neck & neck in the lead.

    The lady is nice but a bit confusing,& looking

    at a keyfob doesn’t thrill me much (I’ve done

    it with a real spectrum analyser,& it wasn’t

    a hell of a rush then!)

    The kA thing is interesting,but he didn’t do

    much of a job crushing the can.



    • http://www.eevblog.com EEVblog

      Yes, funny how they have more than double the votes I do, they must both have MUCH BIGGER audiences than me! :->

  • Shieldcracker

    I wonder how you can cancel this effect, especially if you are working on an engine or some other mechanical device.

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  • Slobodan

    I got two emails so far from Lonela, where she asks for me to vote for her (RS232 for Dummies…and stop button feature – by Ionela). I dont know where did she got my e-mail.

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  • http://obtuze.wordpress.com Arijit

    I did some similar experiment with a 100nF ceramic capacitor. I whacked it and found some shocks. Here is the link…


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