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<feed xmlns="http://www.w3.org/2005/Atom"><title>Wirebook: new lessons</title><subtitle>The web, explained simply</subtitle><link rel="self" type="application/atom+xml" href="https://learn.oddlathe.com/feed.xml"/><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/"/><id>https://learn.oddlathe.com/feed.xml</id><updated>2026-11-12T00:00:00Z</updated><author><name>Wirebook</name></author><entry><title>Why does the TV say &quot;No signal&quot;?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/handshake"/><id>https://learn.oddlathe.com/handshake</id><published>2026-11-12T00:00:00Z</published><updated>2026-11-12T00:00:00Z</updated><summary>Before any picture appears, a console and a TV shake hands: the TV says hello, hands over a menu card of every picture it can show, the console picks the best one on both lists, and for films they swap a secret password. Listen in on the conversation with different TVs, cables, soundbars and splitters, watch it go wrong as sparkles, a quiet step down or No signal, then fix seven people&#x27;s screens, including one that isn&#x27;t broken at all.</summary></entry><entry><title>Why does every speed test give a different answer?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/balloons"/><id>https://learn.oddlathe.com/balloons</id><published>2026-11-12T00:00:00Z</published><updated>2026-11-12T00:00:00Z</updated><summary>A speed test is a water-balloon race: fill a balloon from the internet tap for ten seconds and divide the water by the time. Move the tap to the other side of the world, add hoses, make one leak, test at 9 pm or from upstairs, and watch the reading change while the pipe stays the same. Race three balloons at a time, survive the moment the whole street turns its taps on, then fix six people&#x27;s speed tests, including one that isn&#x27;t broken at all.</summary></entry><entry><title>Why is copying to a USB stick so slow?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/usb"/><id>https://learn.oddlathe.com/usb</id><published>2026-11-11T00:00:00Z</published><updated>2026-11-12T00:00:00Z</updated><summary>Send ants carrying crumbs from a laptop, over a bridge, into a USB stick and watch what really slows a copy down: a skinny USB 2 bridge, tired ants when the fast cache runs out, or paperwork for thousands of tiny files. Then solve copy cases by finding the bottleneck, and catch bargain sticks that lie about their size by filling them with numbered marbles.</summary></entry><entry><title>Why does the internet slow down in the evening?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/pipes"/><id>https://learn.oddlathe.com/pipes</id><published>2026-11-11T00:00:00Z</published><updated>2026-11-12T00:00:00Z</updated><summary>Picture the internet as water: your house&#x27;s pipe, one shared pipe under the street and a big main from far away. Turn on taps for films, calls, games and downloads and watch the pipes fill, see how a full pipe is shared fairly, play a whole evening to find the busy hour, add a film tank nearby, then fix five streets by finding the narrow pipe.</summary></entry><entry><title>Why does a game judder when it can&#x27;t keep up?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/flipbook"/><id>https://learn.oddlathe.com/flipbook</id><published>2026-11-11T00:00:00Z</published><updated>2026-11-12T00:00:00Z</updated><summary>A screen is a flip book with a thumb that turns the page on a steady beat, and the game is an artist drawing the pages. Play it in slow motion to see pages shown twice (judder), torn pages (V-Sync off) and a thumb that waits for the artist (VRR), race the thumb yourself, find out why films judder on 60 Hz TVs, then fix five wobbly screens.</summary></entry><entry><title>How does a text message find its way to someone&#x27;s phone?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/text"/><id>https://learn.oddlathe.com/text</id><published>2026-11-11T00:00:00Z</published><updated>2026-11-11T00:00:00Z</updated><summary>Send a pretend text as a frog: it hops by radio onto a lily pad (a phone tower), rides underground pipes to the message centre, which looks up where your friend&#x27;s phone is, then hops off the lily pad next to them. Break towers, switch phones off and see where the message waits and for how long, compare plain texts with chat-app ticks, count how many texts a long message or one emoji really needs, then find the frog in twelve cases. SMS, store and forward, paging and delivery reports explained simply.</summary></entry><entry><title>What happens when you squish a video too much?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/squish"/><id>https://learn.oddlathe.com/squish</id><published>2026-11-11T00:00:00Z</published><updated>2026-11-11T00:00:00Z</updated><summary>Squish a real (tiny) picture the way phones squish video: watch thin whiskers crumble first, then 8x8 blocks appear, then a splat. Unsquish it to see why it comes back full size but not full detail, compare lossless packing, forward it again and again to see copies of copies get worse, line up three squishes from biggest file to smallest, then skip around a clip to see why jumping ahead can wait, snap or smear until the next keyframe. Lossy video compression, artefacts and keyframes explained simply.</summary></entry><entry><title>Is my hard drive getting old? Reading its health chart</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/drive"/><id>https://learn.oddlathe.com/drive</id><published>2026-11-11T00:00:00Z</published><updated>2026-11-11T00:00:00Z</updated><summary>Take Grandpa Spinner (a spinning hard drive) and Granny Chip (an SSD) for a check-up: change the readings on their SMART health chart, patched spots, wobbly spots, a crackly cable, temperature, age, writing life and spare pages, and hear what they tell you, from fit as a fiddle to stop using it now. Learn why PASSED doesn&#x27;t mean fine and why a CRC error is usually the cable, then diagnose twelve patients on the doctor&#x27;s round.</summary></entry><entry><title>How does a game controller talk to a console?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/controller"/><id>https://learn.oddlathe.com/controller</id><published>2026-11-11T00:00:00Z</published><updated>2026-11-11T00:00:00Z</updated><summary>Your controller fires tiny paper darts at the console hundreds of times a second, each one a snapshot of every button and stick. Hold the buttons and watch them fly, change the polling rate and frame rate, drop some darts on the way, and see why the console never gets buried in paper: it only reads the newest dart each frame. Then climb the lag ladder from thumb to TV and hit a drum on the beat with a sleepy and a speedy setup.</summary></entry><entry><title>Why does a video go blurry, then sharp?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/streaming"/><id>https://learn.oddlathe.com/streaming</id><published>2026-11-10T00:00:00Z</published><updated>2026-11-11T00:00:00Z</updated><summary>You press play and the picture is smudgy for a second, then it snaps sharp. Be a pretend video player: watch it start small on the quality ladder, measure the pipe, climb to sharper chunks and live off its buffer through a train tunnel, then plan a train journey that beats the smart player because you can see the tunnel coming. Adaptive bitrate streaming, buffering, the quality ladder and throughput explained simply.</summary></entry><entry><title>How does a TV remote work when nothing comes out of it?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/remote"/><id>https://learn.oddlathe.com/remote</id><published>2026-11-10T00:00:00Z</published><updated>2026-11-11T00:00:00Z</updated><summary>Press a pretend remote and see the invisible infrared flashes it sends: a wake-up flash, 32 bursts with long and short gaps, and a 38,000-a-second flicker that stops sunshine fooling the TV. Bounce it off the ceiling, block it with a cushion, try tired batteries, then read a real code yourself and catch a garbled one with the check copy.</summary></entry><entry><title>How does a photo fly to the phone next to you?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/airdrop"/><id>https://learn.oddlathe.com/airdrop</id><published>2026-11-10T00:00:00Z</published><updated>2026-11-11T00:00:00Z</updated><summary>Send a pretend photo to the phone next to you and watch how AirDrop and Quick Share really work: a tiny Bluetooth shout to find each other, a private Wi-Fi lane with no router, and numbered pieces that fly over like paper aeroplanes and click back together like a jigsaw. Then be the receiving phone and ask for the missing pieces.</summary></entry><entry><title>How does a phone know a song from hearing it?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/song"/><id>https://learn.oddlathe.com/song</id><published>2026-11-10T00:00:00Z</published><updated>2026-11-10T00:00:00Z</updated><summary>Hold up a phone in a noisy shop and it names the song in seconds. Watch three seconds of a made-up tune turn into a picture of sound, keep only the brightest stars, pair them into fingerprints and let the votes pile up on one song and one moment. Then match a mystery clip&#x27;s star map by hand, and see why humming it usually fails. Earn a badge in hard mode and turn your own name into a star map. Audio fingerprinting and spectrograms explained simply.</summary></entry><entry><title>Why does the video call freeze when you walk to the kitchen?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/roaming"/><id>https://learn.oddlathe.com/roaming</id><published>2026-11-09T00:00:00Z</published><updated>2026-11-11T00:00:00Z</updated><summary>A phone holds one Wi-Fi box&#x27;s baton at a time, and the phone decides when to pass it on. Walk down a pretend hallway past three boxes and watch the bars, race a sticky phone against a careful one, then be the phone in a relay race: grab the next box&#x27;s baton before the picture freezes. Wi-Fi roaming, signal strength in dBm, sticky clients and mesh hand-overs, explained simply.</summary></entry><entry><title>Why does the game lag when someone starts a download?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/queue"/><id>https://learn.oddlathe.com/queue</id><published>2026-11-09T00:00:00Z</published><updated>2026-11-11T00:00:00Z</updated><summary>Your internet line is a shop with one checkout and a download is a shopper with endless trolleys. Run a pretend shop, watch tiny game baskets wait behind the trolleys, shrink the queue or open a quick lane, then be the shop manager for a busy evening and pick the speed limit that keeps the game smooth, and catch a download in a quick-lane costume. Bufferbloat, ping, queues, packet priority labels (DSCP) and smart queue management (SQM) explained simply.</summary></entry><entry><title>How does the router know which device asked?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/tickets"/><id>https://learn.oddlathe.com/tickets</id><published>2026-11-09T00:00:00Z</published><updated>2026-11-10T00:00:00Z</updated><summary>Your home has one internet address but lots of screens. Send requests from a tablet, laptop, TV and games console, watch the router swap labels and write numbered tickets in its cloakroom book, then be the router: hand eight parcels to the right device and stop three tricksters (one with a fake note saying it is for the tablet). Home NAT, private vs public IP addresses, ports and port forwarding, explained simply.</summary></entry><entry><title>Why does a full battery die in the cold?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/cold"/><id>https://learn.oddlathe.com/cold</id><published>2026-11-09T00:00:00Z</published><updated>2026-11-10T00:00:00Z</updated><summary>Your tablet said 45% and switched off on a snowy hill, then came back indoors. Chill a pretend tablet and watch the little ions crawl through cold battery jelly, see its push (voltage) sag below the switch-off line during a big game, then plan a snow day that keeps it working. Lithium-ion batteries, internal resistance, battery gauges and why you shouldn&#x27;t charge below freezing, explained simply.</summary></entry><entry><title>Can a sticker change where a QR code takes you?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/qr"/><id>https://learn.oddlathe.com/qr</id><published>2026-11-09T00:00:00Z</published><updated>2026-11-09T00:00:00Z</updated><summary>Build a QR code and colour its parts (corner finder squares, timing lines, alignment square, format notes, message), scratch it, tear it and stick a price label on it while a real decoder tries to read it at four levels of spare data, then be the sticker detective: preview where five pretend posters really go, compare with the printed address and spot the fake. How QR codes work, error correction and quishing, explained simply.</summary></entry><entry><title>Can a blocky picture be made sharp again?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/blocky"/><id>https://learn.oddlathe.com/blocky</id><published>2026-11-09T00:00:00Z</published><updated>2026-11-09T00:00:00Z</updated><summary>Guess a mystery blob made of just 16 squares, buy back real patches of detail with five coins, then see the original. Press a real enhance button to find out what smoothing and AI upscaling can and can&#x27;t do, and be the snoop who finds a pixelated PIN by trying all 10,000. Pixels, resolution, upscaling and why pixelating or blurring doesn&#x27;t hide a password, explained simply.</summary></entry><entry><title>Does the app keep peeking, or does the website ring a doorbell?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/doorbell"/><id>https://learn.oddlathe.com/doorbell</id><published>2026-11-08T00:00:00Z</published><updated>2026-11-11T00:00:00Z</updated><summary>How does a news app know a new lesson appeared? Race a peeker, a messenger who waits at the door and a doorbell through a pretend day, count the wasted trips, be the peeker yourself, and peek at this site&#x27;s real feed to see a 304 Not Modified. Polling, long polling, push and webhooks explained simply.</summary></entry><entry><title>I changed who can open my link. Does the old link still work?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/sharing"/><id>https://learn.oddlathe.com/sharing</id><published>2026-11-08T00:00:00Z</published><updated>2026-11-08T00:00:00Z</updated><summary>Check a picture and its audience before you share it, then be the guard at the door: pretend visitors with badges and forwarded links, a fresh check on every visit, badges taken away, a link replaced, and a saved copy that no website can snatch back. Authentication, authorization, 401 vs 403 and revoked share links explained simply.</summary></entry><entry><title>Why does zipping photos barely make them smaller?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/packing"/><id>https://learn.oddlathe.com/packing</id><published>2026-11-08T00:00:00Z</published><updated>2026-11-08T00:00:00Z</updated><summary>Guess which four suitcase items will squash — a repeating chorus, a letter, a camera photo and TV snow — then pack them with a real (tiny) compressor and see. Learn why zip looks for repeated patterns, why a JPEG is already packed, and the difference between folding carefully (lossless) and leaving the thick jumper behind (lossy).</summary></entry><entry><title>Where did my day off go?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/holidays"/><id>https://learn.oddlathe.com/holidays</id><published>2026-11-07T00:00:00Z</published><updated>2026-11-08T00:00:00Z</updated><summary>Christmas 2027 lands on a weekend. Rescue the missing day-off tickets by dragging substitute days onto a real calendar for England, Scotland, New Zealand and New South Wales, then sort three different prizes — a calendar mark, a school closure and a paid day off — and see whether two neighbours can picnic on the same red-letter day.</summary></entry><entry><title>How can two people draw on the same picture at once?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/draw"/><id>https://learn.oddlathe.com/draw</id><published>2026-11-07T00:00:00Z</published><updated>2026-11-07T00:00:00Z</updated><summary>Colour one picture on two pretend tablets, switch their Wi-Fi off and on, and compare three rules: last save wins, take turns, and merge square by square. Then see why typing at the same time shifts positions, and how shared editors keep everyone&#x27;s changes.</summary></entry><entry><title>Why does the website still show the old picture?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/cache"/><id>https://learn.oddlathe.com/cache</id><published>2026-11-07T00:00:00Z</published><updated>2026-11-07T00:00:00Z</updated><summary>Compare the logo on a pretend server with the copy on your browser shelf. Soft visits can keep showing a fresh-but-old picture; hard refresh and ETag revalidation (304 Not Modified) explain how browsers decide when to download again.</summary></entry><entry><title>Why can a download pick up where it left off?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/resume"/><id>https://learn.oddlathe.com/resume</id><published>2026-11-06T00:00:00Z</published><updated>2026-11-08T00:00:00Z</updated><summary>Break a pretend file into numbered pieces, interrupt the download, and compare restart-from-zero with resume-using-byte-ranges. See the HTTP Range header and a 206 Partial Content reply that sends only the missing slice.</summary></entry><entry><title>Why does a video call go blurry when the connection is slow?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/compress"/><id>https://learn.oddlathe.com/compress</id><published>2026-11-06T00:00:00Z</published><updated>2026-11-08T00:00:00Z</updated><summary>Dial a pretend video call&#x27;s bandwidth thinner, spend a tiny 10-bit budget on eyes vs mouth vs wallpaper to still read a facial expression, then reveal the clear face. How compression keeps meaningful face detail when the pipe is tiny.</summary></entry><entry><title>Why can two passwords look the same but only one works?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/invisible"/><id>https://learn.oddlathe.com/invisible</id><published>2026-11-06T00:00:00Z</published><updated>2026-11-06T00:00:00Z</updated><summary>Drag a magnifying glass over a pretend message to reveal glowing ghost footprints left by invisible Unicode characters, read a plain-words card for what each blank does, paste any text into an X-ray, repair broken messages while keeping ordinary spaces, and solve three cases where a password, filename or file looked identical but wasn&#x27;t.</summary></entry><entry><title>Who stole all the emojis?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/heist"/><id>https://learn.oddlathe.com/heist</id><published>2026-11-06T00:00:00Z</published><updated>2026-11-06T00:00:00Z</updated><summary>Interview four suspects in a Byte Bakery chat heist, X-ray the fake paw prints, and discover how autocorrect and a spam cleaner teamed up to frame the cat. What spam filters, malware, autocorrect and keyboard accidents really do.</summary></entry><entry><title>Why do phones and computers get hot?</title><link rel="alternate" type="text/html" href="https://learn.oddlathe.com/hot"/><id>https://learn.oddlathe.com/hot</id><published>2026-11-05T00:00:00Z</published><updated>2026-11-12T00:00:00Z</updated><summary>Heat up a pretend phone with games, charging, a duvet or a sunny car, tug a pretend blanket to feel how insulation traps heat, and watch it slow down to protect itself. Then play Cool the laptop: fix seven overheating laptops (duvets, dust, stuck programs, sun, dried-out paste) in three moves or fewer.</summary></entry></feed>
