Salvaging electronics and electromechanics – Free Preview!

Questions

  • 0

    Jacob

    Hi Mr. Ian
    umm is that a Tesla coil at 9:30

    https//www.youtube.com/watch?v=_FTC_Ud_k3U

    This guy is so cool he went to school and became an Aerospace engineer and is really smart.

  • 1

    Jacob

    oops link is not working.Just look up smarter every day hand held Tesla coil.

    • Ian Juby

      Dude! That is AWESOME. Yup, that is a tesla coil. I’ve got one in my garage.
      Ye olde tesla coil.
      If you build one, there’s several things you need to know:
      1) the lightning bolts find the nearest connection to ground. Typically, this will be the ground connection on the nearest power outlet. Because this is connected to the electrical grid of your neighbourhood, this typically means frying every electronic device in your house….and your neighbour’s houses. 🙂
      2) That’s actually the first time I’ve seen someone take a hit from a tesla coil without a chain mail suit. Others who perform with tesla coils (i.e., there’s people who literally dance on top of tesla coils wearing chain mail suits – the suit discharges the electricity around them so they can safely dance and shoot lightning bolts at each other and stuff) have talked about how they had a hole in their chain mail somewhere – a seam they didn’t close up or whatever, and they got hit with the lightning bolt. It was very unpleasant. So it surprises me this guy took a direct hit straight to his hand. 🙂
      3) Although I’m not sure how much, these things do emit nasty X-ray radiation (yes, the same stuff they use to photograph your insides at the hospital). I don’t know how much and I don’t know how much you can be exposed to and be “safe.” But people literally dance on top of these monster tesla coils all the time. I assume they keep track of their time, and thus their exposure to potential X-rays, or they probably even have an X-ray measuring device of some kind to keep track if there are any X-rays and how much.

      In the end, what you are looking at is a transformer. Did you get to that lesson yet? It’s just a transformer with this MASSIVE secondary winding, and it just simply boosts the voltage to ridiculous levels. The challenges are keeping the insulation on the secondary wires from giving way to the millions of volts, and the primary side usually has fairly high voltage (1,000 volts) at a pretty good current – which is deadly.
      Cool find! That was fun!

  • 1

    Jacob

    OK so the transformer steps up the power and makes the higher voltage right? And were could I get a transformer that will make that power because a VCR transformer is to small? And you could make a Tesla coil off a 9 volt? And you also said something about being on the grid? That is the power line going up and down the street? I REALLY REALLY want to make lightning in my backyard

    • Ian Juby

      haha! That’s awesome! 🙂 However, you’re going to have to get your parents in on this one. You’d have to get several transformers which aren’t designed for the high voltages you’re talking about. They’d fail by burning through the insulation in the transformer. There are kits running around for surprisingly cheap, but I haven’t tried these out so I can’t attest to their safety or lack thereof. The main coil is the difficult part to make (and expensive – enameled wire is NOT cheap!), so getting a kit is the way to go. Plus, there’s some complicated electronics involved that I don’t get in to in the course (inductor/capacitor resonance for example) because I have never used these things in robotics. 🙂 So having it pre-engineered, especially if this is your first kit, would save you a lot of headache.
      Furthermore, these kits involve some pretty serious soldering. You’d need to have your soldering skills up to par, or else you just wind up ruining the kit and the board. But ebay has tons of tesla kits: http://www.ebay.ca/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR12.TRC2.A0.H0.Xtesla+coil+kit.TRS0&_nkw=tesla+coil+kit&_sacat=0

      The bottom line is, there are dangers involved. So you HAVE to get your parents involved in this. 😀 Even for a Jacob’s ladder, that one in fact is MORE dangerous because the voltages are very high (~1-3,000 volts) but the current is also very high – so it’s deadly. Jacob’s ladders are more easy to make because of the lower voltages, but cause fires faster, and have deadly voltages and currents with open, exposed wires (the ladder portion itself).

  • 1

    Jacob

    Hey Mr. Ian
    Just wondering does Jetpack academyhave a Facebook page?

  • 0

    Jacob

    typo academy have lol

  • 1

    Jacob

    Hey Mr. Ian guess what? yesterday I got TWO BIG Printers and a pelco cameras pelco.com and they all still work. both of the printer side doors wont shut but hey they were free and the gy that I got them from has like 12 more

    Jaocb

    • Ian Juby

      Hwah dude! That’s awesome! haha! You gotta post pictures! 🙂

  • 0

    Jacob

    OK I will do that (-:

  • 0

    Jacob

    Attachment

    Hey Mr. Ian the pics wont load?

  • 0

    Jacob

    oh they just did never mind

  • 0

    Jacob

    Attachment

    The printers that I got

  • 1

    Jacob

    Attachment

    The motors and fans

    • Ian Juby

      Ho man, you will get a TON of parts out of those printers! Fans, motors, gears, probably even some chain and sprocket drives. Just FYI – the motors in this picture are stepper motors. Those are the kinds of motors we’ll be using to build the 3D printer, and we’ll be learning how to drive those in the next module “Robotic drives and physics.” I actually mention them in passing in the H-bridge lesson, because the H-bridge board is actually for 2 phase stepper motors, but can be used to control 2 DC motors. 🙂

  • 0

    Jacob

    Attachment

    And more stuff from the printers

  • 3

    Jacob

    Attachment

    the camera that still works

    • Ian Juby

      Do you know if this is an IP camera? In the robotic drives & physics module, we’re actually going to explore designing and building a submarine robot. In the design, I’ll be using IP cameras because they can be easily used over a network cable. Does it have a network plug? Or what kind of video feed does it give? You scored dude. those things are expen$ive!

    • Jacob

      HI Ian
      yes it is an IP camera this camera is the exact camera city of Ottawa uses for the street cameras to monitor the traffic at the lights. My uncle works for the city and took my to the monitor room and I got to use them. They are really good I was able to zoom over 2km down the road and was able to read the license plate on the cars as if it was right there. dose it have a network plug ? I think it dose. video feed is the best you can get. And yes they are $$$$ this one on its own is 2000$$. Now I think I Am getting a lot ahead of my self but how do I control this thing?? I am thinking that I will be able to have video feed to my CP but don’t now???

      Jacob

    • Jacob

      HI Ian
      yes it is an IP camera this camera is the exact camera city of Ottawa uses for the street cameras to monitor the traffic at the lights. My uncle works for the city and took my to the monitor room and I got to use them. They are really good I was able to zoom over 2km down the road and was able to read the license plate on the cars as if it was right there. dose it have a network plug ? I think it dose. video feed is the best you can get. And yes they are $$$$ this one on its own is 2000$$. Now I think I Am getting a lot ahead of my self but how do I control this thing??

      Jacob

  • 0

    Jacob

    Attachment

    lots of stuff that is good