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1  Using Arduino / General Electronics / Re: Heat conductivity properties of aluminum? on: July 19, 2013, 09:16:55 pm
If I wrap a bunch of aluminum foil around a plastic container, will it insulate the container, or make the ice melt faster, or something else?
2  Using Arduino / General Electronics / Can shift registers receive input? on: July 14, 2013, 08:36:26 pm

I want to use an ATtiny85 for a project, due to its low power consumption and space efficiency. However, the number of digital pins it has is too low. I also have a 74HC595 shift register. Is it possible to use the pins of the 74HC595 as inputs instead of outputs by using the shiftIn() function? Or will I need a different strategy?

Thanks in advance!
3  Using Arduino / Project Guidance / Re: I need some online electronics providers on: July 10, 2013, 04:27:51 pm
hat being said this site doesn't have free shipping but it and tayda are both resonably priced shipping wise and their prices are quite good.

On it says "For orders up to US$29, Delivery Charge - US$4.00". Does that mean $4 per item, or $4 per checkout?
4  Using Arduino / Project Guidance / I need some online electronics providers on: July 09, 2013, 04:23:59 pm

I am searching for electronics providers that will provide free shipping to Canada. I have found one: but it does not have everything that I need. This is my shopping list sorted by importance (* means that DX has it):

*Peltier Thermoelectric
2x Super Capacitor - Low ESR - 1F/2.5V
AVR 8 Pin 20MHz 8K 4A/D - ATtiny85
AVR 14 Pin 20MHz 8K 12A/D - ATtiny84
Rotary Encoder
Rotary Encoder Knob
Tilt Sensor
Computer cooling fan 7cm x 7cm
Methane CNG Gas Sensor - MQ-4
*HC-SR04 Ultrasonic Sensor Distance Measuring Module
*5mW Red Dot Laser Diode
30 AWG Wire
*B-1 0.8mm Solder Core Wire - 2.0% Flux (100g)
*60W Soldering Iron with Variable Temperature Control (110V AC)
Disposable Camera

Thank you!
5  Using Arduino / General Electronics / Heat conductivity properties of aluminum? on: July 07, 2013, 05:02:08 pm

I have 1 question I would like to ask about the heat conductivity of aluminum:

If I wrap aluminum foil around batteries that are charging, will the foil:
  a. insulate the heat, making the batteries hotter
  b. conduct a very small amount of heat away from the batteries into the air
  c. other (explain)
6  Community / Bar Sport / Mutated Fish (Perch)?! on: July 01, 2013, 08:50:37 pm
Recently, I headed out to Beaverton, Ontario with my family to fish on Lake Simcoe. During that trip, my brother caught one perch that was quite perculiar. The perch had blue markings on its side and near its mouth. Below, I have included a picture of the weird perch beside the picture of a typical perch. Can anyone identify the cause of the blue markings?
7  Using Arduino / General Electronics / Re: Making a transformer as an experiment on: June 26, 2013, 09:06:57 am
Iron will work best - need something ferrous.
I have a 0.9cm wide BBQ lighter tube that has about 11cm of space for the coils. I can attach magnets to the tube, meaning it is iron or steel. So, I'll just experiment with this for now. Thanks for all the info!
8  Using Arduino / General Electronics / Re: Making a transformer as an experiment on: June 25, 2013, 08:43:41 pm
Wrap both windings around the nail.
Side by side, primary on top of secondary or secondary on top of primary?
9  Using Arduino / General Electronics / Re: Making a transformer as an experiment on: June 25, 2013, 05:41:05 pm
The diagrams show a square of iron. How would I do it with a large nail?
10  Using Arduino / General Electronics / Re: Making a transformer as an experiment on: June 25, 2013, 04:34:44 pm
What is the role of the iron?
11  Using Arduino / General Electronics / Re: Making a transformer as an experiment on: June 25, 2013, 02:30:25 pm
Quote from: RoyK
Why not answer your own question by trying it? That's the whole idea behind an experiment ---
At this time, I don't have magnum wire. I also want a bit of background information (as DVDdoug provided), so I know if it is worth it or not. Also, instead of an iron bolt, can I use the cardboard tube wrapped in aluminum tape instead? Also, the YouTube video was a good tutorial, but not a "most simple" one. By "simple", I mean that it only needs the most basic principle of a transformer, and can produce voltage in the secondary coil.
12  Community / Bar Sport / Re: Please Identify This Insect on: June 25, 2013, 02:18:28 pm
Thank you! No wonder I only find them on my lilies!
13  Using Arduino / General Electronics / Making a transformer as an experiment on: June 24, 2013, 05:07:05 pm
I am thinking a making the most basic transformer possible as an experiment. But first, I want to find out if it is possible or not. I have a small cardboard tube and some magnum wire. I make 100 coils of wire on the tube, and secure it with clear tape. Then, I make 50 coils on top of the first coil separate wire, and secure that. If I power my primary coil of 100 coils with an oscillating DC current of 9V, will 4.5V be generated in the second coil (step down transformer)? I the 50-coil is used as primary instead, will the voltage be stepped up to 18V?
14  Community / Bar Sport / Please Identify This Insect on: June 24, 2013, 04:30:11 pm
During this year's spring, I saw several of the red insects on the second picture. They seem to be the ones causing the damage in the first picture. Some were mating, and I found patches of eggs under some leaves. The black stuff (picture three) is the larva. So, can anyone help me identify the name of this insect, so I can deal with it easier?
15  Using Arduino / General Electronics / Re: Turning Arduino on and off using momentary switch? on: May 05, 2013, 03:13:54 pm
Quote from: av8or1
Curious to know how this turned out.
I am kind of scared to try it out.

I'm not.  Ordered one today, will let everyone know how it works out.

No, I am talking about my random circuit.
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