The Cobra RAD 480i retails for about $150, making it one of the cheaper options on the market.Ī radar detector with a great display. The Uniden R7 features integrated GPS and voice alerts for additional road safety.Ī budget-friendly radar detector. ![]() Some areas have outlawed the use of radar detectors for civilians, so check all local laws and ordinances to make sure you aren't illegally owning and operating one.Ī well-rounded radar detector. When choosing a radar detector, the most important thing to keep in mind is whether or not it's legal to own and use in your state. If you see inaccuracies in our content, please report the mistake via this form. If we have made an error or published misleading information, we will correct or clarify the article. Our editors thoroughly review and fact-check every article to ensure that our content meets the highest standards. Our goal is to deliver the most accurate information and the most knowledgeable advice possible in order to help you make smarter buying decisions on tech gear and a wide array of products and services. ZDNET's editorial team writes on behalf of you, our reader. Indeed, we follow strict guidelines that ensure our editorial content is never influenced by advertisers. Neither ZDNET nor the author are compensated for these independent reviews. This helps support our work, but does not affect what we cover or how, and it does not affect the price you pay. When you click through from our site to a retailer and buy a product or service, we may earn affiliate commissions. ![]() And we pore over customer reviews to find out what matters to real people who already own and use the products and services we’re assessing. We gather data from the best available sources, including vendor and retailer listings as well as other relevant and independent reviews sites. ![]() ZDNET's recommendations are based on many hours of testing, research, and comparison shopping.
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![]() The built-in battery powers up to 2 hours of projections for on-the-go entertainment. The Android 9.0 OS allows seamless media streaming with screen mirroring capabilities.ĭesigned for portability, the rugged aluminum MoGo 2 includes a convenient folding kickstand and fits easily into any bag. Automatic focus and keystone correction optimize projections onto any surface. Built-in Harman Kardon speakers deliver clear, robust audio to complete the theater effect.Įasily project up to a 200 inch screen for both small and large groups. ![]() With up to 90% DCI-P3 color gamut coverage, images pop with vibrant hues. Integrated D65 color temperature standard provides natural, accurate colors for a true cinematic viewing experience. This LED projector outputs an extremely bright 400 ISO lumen image that looks sharp even in daylight. The XGIMI MoGo 2 portable projector packs in powerful performance and convenience features into a compact 2.2 pound device. The integrated kickstand and carrying case let you easily transport this 3 pound projector anywhere. Then project up to a 100-inch image on any wall or screen. You can connect smartphones, laptops or tablets using the HDMI or USB-C ports. Access all your favorite streaming apps and use hands-free control with the integrated microphone and Android TV. You can carry and set up the projector anywhere thanks to the long 5-hour battery life.īuilt-in Harman Kardon speakers pump out robust, immersive sound so you don’t need extra equipment. The Mars 3 shines with 1000 lumens of brightness adapting to any lighting conditions indoors or out. The punch also comes with a punchy price tag at $879.99. The Nebula Mars 3 portable projector by Anker is a compact projector that packs a punch with 1080p high-definition resolution that makes any image pop with vivid color and crisp details. High upfront cost but with lower maintenance.ĭLP – Employs tiny mirrors and a color wheel. Offers very high brightness and contrast. Best for small rooms or dark environments. Lower brightness but provides rich colors. There are three main projector technologies to choose from: Opt for a model with built-in speaker for portability, but consider connecting an external speaker for better audio.ĭifferent Types of Small Portable Projectors Multiple options like HDMI, USB, and wireless provide flexible device connectivity.īuilt-in speaker – Convenient but may lack robust sound. Look for a contrast ratio of at least 10,000:1 for deep blacks and vivid colors.Ĭonnectivity – HDMI, USB, Bluetooth, WiFi for device pairing. Higher resolution like 1080p provides sharper image quality, but 720p is adequate for most.Ĭontrast ratio – Higher ratio gives sharper image. Resolution – Minimum of 720p HD, up to 1080p Full HD. Choose a projector with higher lumens if you’ll use it in a room with lots of ambient light. What to consider when buying a small portable projectorīrightness – Measured in lumens, needed based on room lighting. ![]() ViewSonic M1+-2 – Ultra Portable Projector Different Types of Small Portable Projectors.What to consider when buying a small portable projector. ![]() This is fine if you need to find the sum of a small set of terms. There’s a more Pythonic way to do it: # Python 3.11 Keep in mind that range(1, 5) means “a range of integers starting at 1 and going up but not including 5.” In other words, it means “1, 2, 3, 4.” You could express this calculation in Python this way… # Python 3.11 If you write out this sum one term at a time, starting with n = 1 and ending with n = 4, you get this… So you can read the equation pictured above as “The sum of all the values of 2n + 3, starting at n = 1 and ending with n = 4.” The thing above the Σ specifies the final value of the index variable, which in this case is 4.The thing below the Σ specifies the index variable - the variable we’ll use for counting terms in the series (which in this case is n) - and its initial value (which in this case is 1).The thing to the right of the Σ describes each term in the series: 2n + 3, or as we’d say in code, 2 * n + 3.The series in question is determined by the things above, below, and to the right of the Σ: ![]() Σ, or sigmaĪs explained in the infographic above, the letter Σ - called “sigma” - is the Greek equivalent of our letter S. So welcome to the first article in the Math WTF series, where I’ll explain something you’re likely to run into when reading notes or papers on AI and data science: the Σ symbol. I’m going to keep it as layperson-friendly as possible, and in the end, you’ll find yourself understanding stuff like the page I posted above. Over the next little while, I’m going to post articles in a series called Math WTF that will explain the math that you might encounter while learning AI and doing programming. It can’t be helped - machine learning and data science are at the root of the way artificial intelligence is currently being implemented, and both involve number-crunching.Īnd now, the good news: I’m here to help! I’m decent at both math and explaining things. There’s linear algebra, continuous functions, statistics, and a dash of calculus. If you’re planning to really get into AI programming and take great pains to avoid mathematics, I have good news and bad news for you.įirst, the bad news: A lot of AI involves “college-level” math. For many, the first reaction upon being confronted with it would be something like “What is this ℝ thing in the second paragraph? What’s with the formulas on the first page? What the hell is that Σ thing? This is programming…nobody told me there would be math!” This is the sort of material that sends people running away screaming. |
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