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Gadget Hacks How-Tos

iOS 18 Tips, Tricks, How-Tos, News

How To: Build a small hydrogen HHO generator

Make your very own hydrogen (and oxygen) generator with a 9V battery, copper wire, and baking soda (or salt). Why? Who knows. Make sure to check your connections. For more information on this hack, including detailed, step-by-step instructions on assembling your own HHO generator, watch this how-to video.

How To: Reverse a cathode-ray picture tube

Reversing the image on a CRT computer monitor can be a great joke to play on your coworker, if you have the time to play a prank like this. If you have a lot of spare time on your hands, and love to see people miserable, then this is perfect for you. This also works with television sets.

How To: Build an application on Android for mobile devices

This video tutorial is about Android, and no it's not a robotic creature, it's a software platform and operating system form mobile phones and PDAs. The Android system is based on Linux and was developed by Google and the Open Handset Alliance. Code is managed in the Java language, but can be written in C also, although C is not officially supported. A lot of the new cell phone and other mobile devices will be running off of Android, so know how to use it.

How To: Add places to Google Maps

In Google Maps, you can add any place that does not already appear on the map. From your favorite town square to little-known landmarks, make sure everyone can find the places most important to you.

How To: Work with KML in Google

In this hands-on workshop, Googlers Mano Marks and Pamela Fox show how to use tools within Google Maps, Google Earth, and Google Spreadsheets to create, import, and edit KML. They also show a quick integration of KML in the Maps API, and briefly mention geo search and indexing. This talk is useful for developers who haven't had a chance to play with the Maps or Earth creation tools yet, and are looking for quick ways to create and share geo-data.

How To: Make a high-tech spy stethoscope

A stethoscope, often considered the symbol of a doctor's profession, but also used by safe-crackers and auto mechanics to hear sounds that otherwise couldn't be heard. Well, it's time to make a high-tech electronic spy stethoscope with Kip Kay in this gadget video tutorial, for only twenty-five bucks! You can hear and record heartbeats with this spy gadget, or even listen through walls!

How To: Wire a 555 timer chip for PWM

This demonstrates how to wire a 555 timer chip for Pulse Width Modulation. Items used: solderless breadboard, 555 chip, 510 ohm resistor, 100k ohm variable resistor, 1 RGB LED at 20-25ma, wires, and 9v battery. And those vertical lines are what i mean in terms of what you can see only on the camera. You can see the led light of course without the camera.

How To: Solder a resistor to an LED

A basic instruction for electronic enthusiasts. I use an RGB LED and a 510 ohm resistor as I may change from 6 to 9 volts later, but with my LEDs i could go as low as 330 ohms. I sacrifice some brightness for the sake of longer life. To choose your resistor, the value in ohms = voltage of your batteries or power supply / (as in divided by) the amperage that your LED needs to run.

How To: Make your own DIY film projector

Finding a film projector for those who still shoot film, or those who still house film can be tough. They're either sparce or extremely expensive. In this six part tutorial, learn how to make your own DIY homemade film projector for your home without shelling out tons of cash. This presentation is hosted by Dan Mikesell at Pratt Institute.

How To: Hack into encrypted computer data

Xeni visits the offices of the Electronic Frontier Foundation and speaks with Jake Appelbaum and Bill Paul, two of the authors of a security research paper that shows how your computer's memory can be tricked into revealing data you thought was safely encrypted, and out of the reach of others. Hack into encrypted computer data.