| The idle (nominal) voltage on a telephone line is ~48 volts DC, but ~90 volts of 20 Hz AC current is superimposed over the DC voltage already present on the idle line in order to trigger the phone ringer and alert the user to an incoming call.  | |
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Today's How-To Geek Articles | |
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Today's Tech Term
Reprographics | |
| Reprographics (a.k.a. Reprography) refers to the process of duplicating printed materials and graphic images via electrical or mechanical means (in print or digital formats). | |
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| This section contains what we're reading from around the web, along with commentary from our editors. Think of it like your daily digest of the most interesting things online. | |
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| Apple’s Podcasts app automatically downloads new episodes of podcasts you subscribe to, storing them on your device. That’s convenient, but it can strain all those 16GB iPhones and iPads. | |
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| Windows features a ridiculous number of ways to shut down. You’ll find options on the Start menu, Administrative Tools menu, and the Login and Lock screens. You can also shut Windows down using keyboard shortcuts (Alt+F4 at the desktop) and even the command line. Here’s how to disable them all for specific users. | |
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| A Kodi-based home theater PC is great for watching your ripped or downloaded videos, but even if you’ve cut cable from your life, there’s still a time and place for live TV–like sports. Here’s how to watch and record live TV from Kodi on Windows. | |
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| So, you’ve opened the doors of advanced functionality on your Android phone by rooting it. That’s great! You can do stuff with your phone that other people can’t do with theirs. But what happens when things change and you want to unroot it? Fear not, we’ve got you covered. | |
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| If you start encountering bad sectors on your hard drive and decide to format it, will it “remember” those bad sectors afterward or not? Today’s SuperUser Q&A post helps answer a curious reader’s question about bad sectors and formatting. | |
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| While your Nest Thermostat is obviously meant for adjusting the temperature in your home, it can pull double duty and also act as a motion detector of sorts. Here’s how to set it up. | |
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| If you use a Mac, chances are you might not even realize that OS X comes with a firewall. This firewall helps ensure unauthorized app and services can’t contact your computer, and prevents intruders from sniffing out your Mac on a network. | |
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| There are occasions when getting into Android's bootloader or recovery systems is necessary—perhaps the OS is having issues and you need to factory reset, or maybe you want to root your phone. Fortunately, booting into the bootloader and recovery are both very simple. Here's how to do it. | |
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| You can sync notes on your iPhone or iPad to your iCloud account, but did you know you can also sync notes with Gmail? You can add your Gmail account to the Notes app and access any notes added to that account on any computer–Mac or Windows. | |
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| Jump lists contain commands and recent files you see when you right-click an icon on the Windows Start menu or task bar. If you’d like to clear your recent items from a jump list, you can. The trick is finding the right file to delete. | |
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