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How To: Make nitric acid

Watch this science video tutorial from Nurd Rage on how to make nitric acid. They show three ways to make nitric acid based on two different chemical approaches, both of which can be done using easily accessible materials.

How To: Get Started with MicroPython for ESP8266 Microcontrollers

For anyone interested in using cheap, Wi-Fi-connected microcontrollers like the ESP8266, the Arduino programming language can be a barrier to entry. Based on C++, Arduino requires knowledge of more computer science than languages like Python. Fortunately for beginners, setting up MicroPython on an ESP8266 allows anyone to write Python on affordable microcontrollers in a matter of minutes.

News: Hands-on with Samsung's Official OEM Cases for the Galaxy S9

The Galaxy S9 is now in the hands of millons of excited users. Getting a new phone is always fun, but it's important to think about protecting your device. Perhaps the most popular cases for the Galaxy S9 are the official OEM options from Samsung. There are a plethora of cases, whatever your preference and needs may be. Let's take a look at each case individually, along with the pros and cons.

How To: Completely Customize the LED Notification Colors on Your Nexus 5X or 6P Without Rooting

The notification light on phones and tablets is slowly disappearing. The once staple feature is now only found on a few devices, and a bevy of other notification systems have sought to fill the gap. The most popular of these systems is Ambient Display, which has grown in popularity with OEMs over the last couple of years; even Google's own Nexus line of phones have made the plunge.

How To: Enable LED Flash Alerts for Calls, Texts, & Battery Warnings on Android

When ringtones and vibration alerts miss the mark and fail to grab your attention, causing you to miss an important call or text, LED flash alerts are a great backup plan. While we already showed how to activate this on Samsung devices, the apps shown below make this feature easier to toggle on and off. Plus, they work on devices that don't have flash alerts included in the system settings.

How To: This DIY Arduino Bicycle Safety System Includes Turn Signals, Brake Lights, Strobe, and More!

As dedicated bicyclists are well aware, riding can be very dangerous. Now that daylights savings time has ended in the United States, darkness appears quicker, and the night is especially dangerous for cyclists because of the low visibility that drivers have. Not only is darkness a danger, but also fog, blizzards, and heavy rain—all wreaking havoc on the vision. To combat this, bikers attach reflectors: clear front reflectors, red rear reflectors, amber pedal reflectors, and clear side reflec...

How To: Beat level 20 of Angry Birds Seasons with three stars

Beat the twentieth level of Angry Birds Seasons with three stars! On December 1st, Rovio released their version of an advent calendar—Angry Birds Seasons (aka "Angry Birds Christmas"). Each day leading up to the Christmas holiday, a new level will become available to Angry Birds enthusiasts worldwide. Stuck? No problem: YouTube's 23hathman has pledged to post a three-star walkthrough for each of the game's levels. In this, the December 20th installment, we learn how to beat level 20.

How To: Manage second day unwashed hair frizzies

Hairstylists often recommend that you don't wash your hair more than three or four times a week, since the natural hair oils will help maintain hair moisture and keep strands strong and healthy. But any girl who leads an active (read: sweat-inducing) lifestyle knows that second day hair feels greasier than the gulf coast.

How To: Practice proper gaming etiquette playing online in Black Ops and other games

The concept of video game etiquette is foreign to many people, including a disgraceful number of frequent gamers. The combination of anonymity and role-playing in online games can lead people to be dicks in all sorts of obnoxious ways, making a fun activity distinctly less fun for everyone. Watch this video to learn about proper online gaming etiquette in the context of Call of Duty Black Ops. These lessons extend to most games, however, and practicing them will results in people liking to pl...

How To: Eat properly in the 24 hours before a 5k race

The day before a 5K race can be an exercise in stress as you wonder what to eat and drink and when to do it, as well as about the race the next day. This video should help alleviate the first concern by giving you tips on what to eat and drink in the 24 hours leading up to a 5K to ensure that you are as well-nourished and hydrated as possible for your race.

How To: Make Korg nanoKontrol transport buttons work in FL Studio 8 or above

FL Studio is one of the biggest names in digital music-making software, and Korg the biggest in physical gear. Unfortunately, FL Studio and the Korg nanoKontrol USB controller don't get along out of the box, and the transport buttons on the Korg won't work with FL Studio. That is, until you perform the steps in this video that will lead to a blessed union of software and hardware.

How To: Make Obsidian and a Gateway to get into Hell in Minecraft

The Halloween update from Notch added many amazing features to the game including Biomes, and more! One of the more prominent, game changing additions were Gateways that lead you straight into Hell. Every step you take in Hell is equal to 16 steps in the outside world. The way you make it is through creating a gateway of Obsidian and igniting the center of it. In this video you will get a tutorial on how to make the Obsidian for the Gateway as well as how to create the Gateway and teleport in...

How To: Build a mini fume extractor

Materials needed: Altoid mint tin, 9 volt batter and connector, switch, 7812 voltage regulator, 12 volt computer fan, carbon filter and 2 pieces of screen. Wire the battery connectors. Solder all of the following: Negative connector to the switch, wire to the switch, ground wire of the voltage regulator to the middle wire, output for the 7812 to the fan, positive lead on the 9 volt connector to the input on the 7812 and the negative from the 7812 to the negative on the fan. Test. Put all the ...

How To: Build dexterity and strength in your hands on the guitar to solo faster

A key element to making any guitar player, whether lead or rhythm, a great player is having good muscle memory and plenty of dexterity and strength in both your left hand and right hand. For those just getting started, or for those who have been playing for a while but are still having a hard time pulling off bends or holding down chords and barre chords, it's crucial to exercise your hands and build that dexterity and strength. In this fantastic video you will learn various exercises to help...