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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: Repair a blown subwoofer

OK, you've done it, you've blasted your DJ set just a little too loud and now your speakers are dust. Well, before you rush out and replace them, why not try repairing them on your own? That's right, with this how to video you can take the necessary steps and breath new life back into that fried speaker. You'll need a soldering iron, the appropriate gauge wire, and some time. This project isn't quick and it's not necessarily easy either, but you'll feel good when you've saved your speakers. B...

How To: Set up a mini hidden camera easily

This video shows you how to set up and hide mini wireless spy camera. Where you put it is up to you. Who you spy on is up to you. If you're wanting to keep an extra set of eyes on someone, watch and learn. Whether it's your bathroom or kitchen, put your eyes on the prize.

How To: Remove the SIM card from an iPhone

Check out this instructional electronics video that illustrates the simple process of removing the SIM card from an iPhone. It doesn't take much to pull the SIM card out of an Apple iPhone - just a small paperclip will do the trick. Check out how it's done by a technician in this tutorial video.

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: Connect a laptop or PC to your TV with an RGB cable

In this Electronics video tutorial you will learn how to connect a laptop or PC to your TV with an RGB cable. Take your RGB cable and plug it in to the back of the TV as shown in the video. You can also do this with the HDMI cable. Now take other end of the RGB cable and plug it in to the laptop or PC. Then you right click on your desktop, go down to graphics options > output to > monitor. Now you have to change the input to your TV. This will depend on the make and model of your TV. Once tha...

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: Make a TV remote jammer

Televisions are an amazing innovation that allow for endless hours of entertainment and information dissemination, but sometimes you just want them off! Make a TV remote jammer as a joke, to get a few hours of quite or just for fun.

How To: Turn off your iPod Nano or iPod Classic

You can turn off both the iPod Nano and the iPod Classic the same way. To turn it off you have to push a button on the click wheel of the iPod. You will push and hold the play pause button until the iPod goes off. The play pause button is the one that has the two lines and the triangle side by side. Once you have held them down and the iPod has gone off then there is one more thing you need to do. On top of the iPod there is a lock button just move that button to the lock position and you are...

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: Clean the camera contacts on a DSLR

When the camera has trouble auto focusing the first step to take is to clean the contacts on the lens. If it continues then the contacts on the camera may need cleaning. When you clean the contacts in the camera you have to be extremely careful because they are inside the shutter chamber and there are a lot of small parts that can be easily broken in there. Face the camera down at all times during the cleaning procedure. Take the battery out of the camera and remove the lens. Put the rear cap...

How To: Solve the blinking "FEE" error message on a Nikon DSLR

In this video, it is demonstrated how to get rid of a "FEE" error message on a Nikon DSLR camera. The solution is fairly simple and quick to do. First you will want to turn your camera on to where you see the "FEE" error message on the LCD screen. Next, you will set the camera's aperture ring to the highest number available. After this, the last step is to lock the aperture ring by using the switch. After doing this step, your camera should return back to normal working order and the "FEE" er...

How To: Use a digital camera as a webcam for Skype

In this video tutorial, viewers learn how to use a digital camera as a webcam on Skype. Users will need the AV cable and a USB capture device. Begin by connecting the AV cable to the USB capture device. Plug the cable to your computer and your digital camera. Users will need to download and install the Debut Video Recording software. Open the program and click on Device. Users may have to go to Options and configure the settings. On Skype, right-click the person you want to call and select Sh...

How To: Fix a compact disc player drawer problem

When CD and DVD players stop working, it's usually because of the drawer not opening and/or shutting. For this CD player, the problem turned out to be a broken belt between the motor and the wheel that has the gear that opens the drawer. Look at these two video tutorials to see how easy it can be to fix, by replacing one belt with a rubber band.

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: Transmit files wirelessly on the Canon EOS 7D

You can easily share and transport your photo and videos on the Canon EOS 7D by using the wireless file transmission option. See exactly how sharing and downloading your files to computers and other devices works in this video. When the digital SLR camera is combined with the WFT-E5A Wireless File Transmitter, transmitting is easy.

How To: Download music using Safari on your iPhone or iPod

The viewer learns how to download music on their iPhone or iPod using Safari. The video starts with the instructor talking about what it was that made him decide to use Safari to download music. The speaker uses a lot of profanity in his intro and the instructional part of the video does not start until 3 min into the video. The video/audio quality is poor at times. The instructor will show you in a step by step manner. If the viewer follows the instructions (and ignores the extra blah blah b...

News: The Anti-Cheater Hidden Camera Wall Hook

WonderHowTo loves gadgets. We also tend to enjoy getting our hands (just a little bit) dirty. So, naturally, Brando's Wall Hook Coat Hanger Camcorder is the latest gadget to excite. Disguised as a coat hanger, the device is actually a camera triggered by motion detection. And paired with the see-all glass doorknob, your significant other ain't getting away with nothing...

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 the RPT mode on a Nikon SB-800 and SB-900

This is an Electronics video tutorial where you will learn how to use the RPT mode on a Nikon SB-800 and SB-900. Repeat mode gives a flashing strobe effect with which you can take multiple shots in one single long exposure. In Nikon SB-800, switch on the flash and select the RPT mode. The video then demonstrates the various selections available in the RPT mode. In Nikon SB-900, again switch on the flash and select the RPT mode by pressing on ‘mode’ button. The video then goes on to demonstrat...

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: Restart a frozen iPod Classic or iPod Video with the Menu & Center buttons

If you still have one of the older iPods, like the iPod Classic or the iPod Video, then you might have some problems with them freezing up occasionally. If that does happen, this video will show you the quick steps to restarting your Apple iPod by pressing and holding the menu and center buttons. If you this doesn't work, you can try restoring the software via iTunes. If that doesn't fix the frozen iPod, then you'll need to contact Apple or a repair technician.

How To: Fix broken home button on iPod touch

So you want to go home eh? Just can't seem to get there? Well, if you're dealing with a broken home button on an iPod touch this can be a frustrating challenge that can leave you wanting to hurl your device across the room. Well, worry no more. This video will get you home quicker than you can click your ruby slippers together. It's easy too, and doesn't require you pulling your device apart, soldering wires or buying replcement parts. Fortunately, the problem is a software one, so fixing it ...

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