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How To: Calculate compound interest using a TI-84 and solver

This is a video tutorial in the Electronics category where you are going to learn how to calculate compound interest using a TI-84 and solver. Press the apps button on the calculator and press enter to load the TVM Solver which is the 1st choice. Here the meaning of various notations are N is time, I% is the percentage, PV is present value, PMT is payment, FV is future value and C/Y is compounding period. The problem is find the compound amount and the interest earned on $12,903.45 compounded...

How To: Make your own solar panel

In this video, we learn how to make your own solar panel.The amorphous solar glass is the cheapest but it's also the least efficient. You can do anything you want with these and they are durable. The hexagon cells are the most efficient and most expensive as well. The poly crystalline is almost 2 watts a piece and can be purchase in lots of any size. You have to tab these cells together and they are extremely fragile. Be careful when you work with these. To make these, you will solder tabbing...

How To: Unlock your AppleTV

Mike Agerbo explains the benefits from listening to one's music through AppleTV, however it seems that one cannot listen to any music or other audio files unless he/she is using iTunes media. Agerbo explains how you can use Apple TV with other types of media, using a program called ATV Flash. Agerbo believes ATV Flash to be an easy and inexpensive tool to upgrade one's Apple Television so it can use the USB port and download and use other media content. One can also create a Boxee account to ...

How To: Hack someone's web cam or online security camera

This tutorial will let you hack into a wide selection of web cams and online security cameras. The hack is actually quite easy, and is best done with a browser like Mozilla Firefox. Navigate to Google in your browser, and then type in "inurl:viewerframe?mode+refresh". This piece of code will open up a list of active webcams. Then just surf through your choices and watch whatever you want. You can even change the camera angle and zoom in and out of the picture!

How To: Print 2-sided (duplex) w/ an Epson all-in-one printer

The Epson video describes how to print two-sided on one piece of paper. When document is ready, go to "File" and then "Print". Click the "Properties" button and select Page Layout tab and turn on the two-sided printing option. Click "OK" in print window. Wait for Epson printer to complete the first page. Take paper, flip over and put it back upside down in the paper feeder. There are instructions that will pop out on screen for this. Click resume and the second page will be printed on the bac...

How To: Graph Mario on a TI-83 Calculator

When it comes to graphing and comparing functions, the TI-83 graphing calculator is the end-all device for math and science students. But one of the most entertaining aspects of Texas Instruments' powerful algebraic and trigonometric calculator is not the equations themselves, but rather the art that can be "equated" on them—just think of them as the mathematical equivalent of the Etch A Sketch.

How To: Make a burning laser pointer that produces heat

In this video tutorial, viewers learn how to make a burning laser pointer. Users will just need a regular 5Mw green laser pointer. Begin by unscrewing the top of the laser pointer and take out the batteries. Carefully with a pair of pliers, break the glue seal and remove the laser. Using a micro screwdriver, make sure that the screw on the laser is tight. Now using a soldering iron heat the 03 component shown in the video for a few seconds. Then assemble the laser back together. This video wi...

How To: Make your laser pointer run on AAA batteries

This video shows us the method to make your laser pointer work with AAA batteries. Take a metal casing made of metal. In the video, we take a Duracell mini flashlight and remove the front and back part. Unscrew the top and back of the laser pointer and remove the batteries. Roll some aluminium foil and put it in the metal casing. Put the AAA batteries in the casing with positive side inside. Put the casing and the laser pointer together and the laser works. Bind the two together by two rubber...

How To: Use Quick Connect Wireless with Epson projectors

In this tutorial, we learn how to use Quick Connect Wireless with Epson Projectors. First, make sure you have one cable connected to the projector and one cable connected to the computer with a USB streamline. This makes it much easier and more efficient to plug in your projector. As soon as you plug this in, you will see a message appear on your notebook, then the screen will star to appear on the projector as it does on the notebook. It will take a few seconds, depending on the monitor and ...

How To: Build a small DIY hydrogen fuel cell science experiment

The hydrogen fuel cell has great potential to replace carbon-based fuels in our vehicle fleets and stave off global warming. It's a difficult concept intellectually, so why not make this fun little science experiment to try it out for yourself? Yes, by following these simple instructions you can make a small hydrogen fuel cell at home that will even power some devices!

How To: Use a multimeter to test common household appliances

If you're doing any sort of electrical work at home, a multimeter is an invaluable tool to have. But as invaluable as it is to have a volt/ohm meter, it is obviously even more invaluable still to know how to use one. And, with this electrician's how-to, you'll learn how to do just that. For more information, and to get started using and reading multimeters yourself, watch this free video guide.

How To: Transform Multiple Screens into One Big Virtual Display

The Junkyard Jumbotron is an amazing project that allows a collection of random web browser enabled displays—laptops, smartphones or tablets—to share a single image split across the group, creating one large virtual display. Created by Rick Borovoy at MIT's Center for Future Civic Media, the app is completely free and open, meaning you can do it yourself in a matter of minutes. It works like this:

How To: Skip commercials with your Comcast DVR remote control

In this tutorial, we learn how to skip commercials with your Comcast DVR remote control. First, press the cable button, then press and hold the set up button until the cable button blinks twice. Now, enter in "994" on your remote. After this, the cable button will blink twice again. Now, press the setup button again and type in "00173", then press a button you don't use a lot. Now, the cable button will blink again. Now, turn on a show you have recorded and it will just through the commercial...

How To: Load a cartridge into a Kodak G600 Printer Dock

This interactive Kodak printer tutorial takes you through every step necessary to fully load a cartridge into a Kodak EasyShare G600 Printer Dock. If you have a Kodak EasyShare digital camera, you probably have one of these G600 printers, and you've probably had a problem with it, or not, like a stuck printer cartridge, but lets not get into that, let's get into how to insert a printer cartridge. Let Kodak teach you how. Load a cartridge into a Kodak G600 Printer Dock.

How To: Set up the tone arm of a record player

In this how to video, you will learn how to set up a tone arm on a record player. First, you will notice the counter weight at the other end of the tone arm. Remove this first. Set the dial set to zero and have the lever pushed forward. Slide it on and lift the arm off of its rest. Play around with it until the arm floats. The next thing to do is to balance the cartridge. Many cartridges have different weight requirements. If you do not have the weight set up behind the arm, you cannot use di...

How To: Read a binary clock with the BCD format

Check out how to read a binary clock in this how to video. You'll see how to read the BCD (binary-coded decimal) format like so many can't. Just watch this if you have trouble determining the hours, minutes, or seconds on your binary clock. You can read it in standard or military time if you'd like.

How To: Build a 3D scanner from a $25 laser level

Systm is the Do It Yourself show designed for the common geek who wants to quickly and easily learn how to dive into the latest and hottest tech projects. We will help you avoid pitfalls and get your project up and running fast. Search Systm on WonderHowTo for more DIY episodes from this Revision3 show.

How To: Burn a video to DVD using DVD Flick and ImgBurn

In this Electronics video tutorial you will learn how to burn a video to DVD using DVD Flick and ImgBurn. Do a Google search for 'download DVD flick' and download the program from the first link in the search result and install it. Then go to Download and search for 'imgburn', download and install it. Now open up DVD Flick, click on 'add title' on the right side and drag and drop the video file you want to burn. Then you go to 'menu settings', select the menu you want and click 'accept'. Then...

How To: Make a simple toy motor

It’s just a few steps to make a toy motor. Take a battery of any brand, then take two safety pins. Attach them to both the sides of battery as they act as positive and negative. Then take a magnet, keep it on the battery. Now take a strip, which is rolled into a circle, and take two leading wires from it. Then keep this strip in between the safety pins and just start it up by rotating to one side. Then leave it aside, it rotates continuously.

How To: Make a night vision device

Ever wish you could see in the dark? Well, you can't but this how-to will show you a way to build a device to help you out. You will need light polarizors, a flashlight, and a digital camera. Make an infrared night vision device, just follow along with the steps in this video tutorial. Now you can see at night!

How To: Set up an X10 spy camera

The spy camera shown in this how-to video has a 60 foot cable, and is full color and has audio. This spy cam can be used as a security device, or to feed paranoid delusions or stalking urges. Watch this video tutorial and learn how to set up an X10 spy camera.

How To: Make your own radio station

This instructional video offers a description and overview of how to set up your own FM broadcast station. Operating from 88 MHz to 108 MHz. It describes how a FM transmitter works and how to make one. It presents a simple di-pole radio antenna for FM broadcasting and how to make one. And finally it explains how with theses two components one can set up their own station from anywhere. The video was made by Seth Gadsden in collaboration with Stephen Dunifer and Free Radio Berkeley.

How To: Strip your Casio fx-82MS calculator

Take a look at this instructional video and learn how to take apart a Casio fx-82MS calculator. First, you'll need to get a screwdriver the take off the calculator's backplate. Make sure not to misplace those screws afterwards. You should be able to see the motherchip after taking off the plate, this is the next item you'll want to remove. These screws are extremely small so it might be best to use a knife to unscrew them. Lift the motherchip and take out the rubber key pad off. To put it bac...

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