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Course: Electrical engineering > Unit 9
Lesson 4: Digital cameraWhat is inside a digital camera? (2 of 2)
In this video we compare different revisions of the same digital camera. Created by Karl Wendt.
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But if you put it back together will it work? Or will it shock you?(7 votes)
It all depends on how you disassembled the product. If you were careful enough to not damage any component, it should work like before. Manufacturers assemble it like this before you buy it.(11 votes)
How many resistors and capacitors are in the new camera?(2 votes)- Actually both circuit boards are the same, (manufactures rarely change it as long as it's working fine) . As seen in the video the only changes are for reduce in production costs. That's normal, mainly for electronics.(2 votes)
Can you make a video of whats inside a digital phone?(2 votes)
how does a nerf gun work please make a video for that(2 votes)
How would a camera from a high end company look like?(2 votes)- why are batteries placed the way they are, like + - and - + ?(0 votes)
Electricity, as you probably already know, is the flow of electrons through a conductive path like a wire. This path is called a circuit.Batteries have three parts, an anode (-), a cathode (+), and the electrolyte. The cathode and anode (the positive and negative sides at either end of a traditional battery) are hooked up to an electrical circuit.The chemical reactions in the battery cause a build up of electrons at the anode. This results in an electrical difference between the anode and the cathode. You can think of this difference as an unstable build-up of the electrons. The electrons want to rearrange themselves to get rid of this difference. But they do this in a certain way. Electrons repel each other and try to go to a place with fewer electrons.In a battery, the only place to go is to the cathode. But, the electrolyte keeps the electrons from going straight from the anode to the cathode within the battery. When the circuit is closed (a wire connects the cathode and the anode) the electrons will be able to get to the cathode. In the picture above, the electrons go through the wire, lighting the light bulb along the way. This is one way of describing how electrical potential causes electrons to flow through the circuit.However, these electrochemical processes change the chemicals in anode and cathode to make them stop supplying electrons. So there is a limited amount of power available in a battery.When you recharge a battery, you change the direction of the flow of electrons using another power source, such as solar panels. The electrochemical processes happen in reverse, and the anode and cathode are restored to their original state and can again provide full power.(4 votes)
does the quality of the product reduce if the upgrade is done? or only the size of product reduces?(1 vote)
It does not seem they reduced the quality , but just found a cheaper way to make them.(2 votes)
- at2:14, what is an electrolytic capacitor?(1 vote)
What is that big black dot behind the LCD(1 vote)
I do have one question, how come he couldn't watch the video he made in reverse so that he could put the camera back together?. I get that it would be confusing and buying another would be easier, but still.(1 vote)
2:14Video transcript
OK. So I took a part two of
the exact same camera. And I did it, to be
honest, because I took the first one apart to
identify the parts inside of it and had some issues
getting it back together because some of the
screws just were stripped, and it did not want
to go back together. And so I bought another
one and found out something kind of interesting. So this camera,
a lot of products go through different revisions
that don't necessarily show up in model numbers. So that means that
the manufacturer may have found a better
way or a less expensive way to produce something. Or it could be that they
just found a cheaper way to produce
something and were able to improve their margins. And so with this camera
being so low cost, I'm sure the margins are
of a great deal of interest to the manufacturer. If you look, this one says
version 3.8 and this one says version 3.3. So this is an older version. This version has an epoxy potted
central processing unit or CPU. And this one has just a
plastic cover over it. So the plastic cover may not be
as robust as the epoxy potting. I'm not sure, but it doesn't
look quite as stable. It would be harder to
mess up those wires. And when I pop
this off, the wires are clearly messed
up to the CPU there. And obviously, the boards
are totally different colors. I guess that lets
the manufacturer know that they are
different revisions. If you the flip the boards over,
you can take a look at the-- let me zoom in just
a little bit on this. You can see the
charge couple device or the light capturing
device is very different. So this one looks
larger, more robust. This one looks a lot smaller. So it appears that
what they've done this is a cost reduction,
probably a reason to change. Also, the onboard memory is
a different manufacturer. So it may be that this memory is
less expensive, the new memory. This board doesn't
need this capacitor. And so perhaps this
electrolytic capacitor was a cheaper way of storing
a charge during the photo process. And if you look at
the lenses here, this one's got a big
lens cover over it. And this one has no
lens cover over it. So that probably added cost. I don't believe that's
actually the lens. I think it's still
that tiny little thing that you see inside
this one here. But it looks bigger with that. And they probably just got
rid of it to reduce cost. So anyway, that's the difference
between one of the earlier iterations and one of
the later iterations. But as far as consumers go, you
wouldn't know any difference at all when you bought the
two cameras because they're virtually identical
on the outside.