Lead Acid Batteries Search Results

News: This LEGO Mindstorms Submersible Can Be Piloted by Your Xbox Controller

Making little robots with a LEGO Mindstorms NXT set is already cool, but putting one underwater? Now that's just crazy. That didn't stop this engineer, who built a LEGO submarine that can not only maneuver around his fish tank, but can also be remotely controlled with his Xbox controller. The craft has a sealed battery compartment, exposed Power Functions motors, and features real-time communication between it and a laptop using a NXTbee wireless module.

How To: Plant and care for Rhododendrons

Rhododendrons must have lime-free soil and that can make them tricky for some of us that garden on neutral or limey soils. Planting in the garden is a waste of time and money. If you want, you can make a raised bed and fill that with acid soil but digging a hole in your garden and filling it with acid (ericaceous) compost only works for a while. The water from the surrounding soil will drain in and spread the lime and although you can acidify soil with sulphur chips you really are making life...

How To: Operate the Nikon D80 digital camera

Watch this instructional video brought to you by Nikon's Digitutor to learn how to operate the Nikon D80. This Nikon D80 video tutorial demonstrates how to use different solutions for various shooting situations, search from control panel, search from viewfinder, use the caerma body: front, top, back, maulti selector and mode dial, attach a lens, insert the battery, set the time and date, insert a memory card, format a memory card, adjust the viewfinder focus, use different shooting modes suc...

How To: Do a proper cartwheel

Cartwheels are so much fun! Who doesn't love to twirl around? If you don't know how to do one of these fun moves, check out this video! Step by step, this tutorial will teach you how to relive your childhood or release your inner gymnast.

How To: Make the y-axis lead screw for a CNC router

A CNC router machine is probably the most useful tool a hobbyist can own, but the price for a CNC machine on the market is way more than the average hobbyist is willing to spend. You can build your own CNC with very basic tools, little knowledge of machinery, mechanics, or electronics, but be warned, these machines are inherently dangerous, so wear the proper protection and use common sense. At the very least, read the instructions and precautions on every tool you use.

How To: Make the z-axis lead screws for a CNC router

A CNC router machine is probably the most useful tool a hobbyist can own, but the price for a CNC machine on the market is way more than the average hobbyist is willing to spend. You can build your own CNC with very basic tools, little knowledge of machinery, mechanics, or electronics, but be warned, these machines are inherently dangerous, so wear the proper protection and use common sense. At the very least, read the instructions and precautions on every tool you use.

News: Pentagon Funds Real Life Spider-Man Technology

Chemical engineers at Cornell have created a small device that may one day turn troops into real life spider-men. The device would cradle in the palm of the hand, allowing troops to scale walls. It uses an adhesive inspired by the Floridian leaf beetle, an insect that "can adhere to leaves with power 100 times stronger than its own body weight".

How To: Unlock Android 9.0 Pie's New 'Feature Flags' Menu to Modify System Settings

There's a new secret settings menu hiding in Android 9.0 Pie that offers Chrome-style "flags" to the overall operating system. Since it's currently the first Developer Preview and Public Beta versions, it's possible that this menu could disappear entirely when the stable version finally gets released, but it could also persist in its current hidden state where you have to unlock it.

News: 21 New Features in Android 8.1 for the Essential Phone

After testing a series of Android 8.0 builds, Essential hit the reset button and jumped to Android 8.1 Oreo. The beta program didn't last long, as Essential has now released the official 8.1 update to the masses. The features from the 8.0 betas are all still there, plus a few goodies specific to the updated version. We'll highlight the standouts here.

News: The Razer Is Now the Best Gaming Phone You Can Buy

When it comes to mobile gaming, you have a lot of fantastic options. Most flagship devices on the market, such as the Galaxy Note 8, iPhone 8 Plus, or OnePlus 5T, are perfectly capable of giving you an excellent, immersive experience. If you're looking for the ultimate way to experience Animal Crossing: Pocket Camp or something with more action like Into the Dead 2, the Razer Phone is the winner.

News: How Stable Is the Galaxy S8 Oreo Update?

So you're thinking about downloading the Galaxy S8 Oreo beta, but you're not sure if it's stable enough to use. It is a beta, of course, so you might want to wait for others to give it a try. Over the past ten days I've used the Galaxy S8+ running Android Oreo as my daily driver, running down the best new features. Let's take a look at the bugs, the performance, and the battery life.