
On the plane out to Chicago for Macstock, I finished the book I was reading on my Kindle. One of my favorite things about reading on a Kindle is that I can easily buy another book and keep on reading. I don’t have to wait until I can find a bookstore, or drag along several heavy, made-of-wood books.
When I got to my hotel, I used my Mac to buy another book from Amazon and sent it to my Kindle. I turned on the Kindle, and went to WiFi settings, but realized I wouldn’t be able to connect to the hotel WiFi. Connecting to WiFi had the typical interstitial popup page where you have to enter your hotel room number and your name. The Kindle does have an “experimental browser” that’s been experimental for about 10 years now, but connecting to the hotel WiFi didn’t make the popup happen.
No worries. Books are just mostly text files so they’re wee tiny, which means even the worst cell phone signal over tethering would be good enough to download my book. My iPhone’s hotspot was enabled, but when I opened up the WiFi section of my Kindle, my iPhone wasn’t visible in the list of available hotspots.
I tried rebooting the Kindle, turning off the hotspot on my phone, and on again, but nothing would make my iPhone’s hotspot appear.
There’s a solution to the problem and that’s our Tiny Tip for today. In Settings > Personal Hotspot, you’ll see a toggle called “Maximize Compatibility”. If you toggle it on, the Kindle can immediately see the WiFi created by your iPhone. As soon as I connected, I was able to download my book in short order.
Underneath the Maximize Compatibility toggle it says “Internet performance may be reduced for devices connected to your hotspot when turned on.” That’s nice, but I got curious about what it was actually doing under the hood. I know Apple doesn’t want us to worry our pretty little heads about such things, but I like to understand things.
I had a theory about what this toggle might be doing, but I wanted to confirm my theory. I looked for an Apple support article explaining it, and while they did explain when to use it, the support article didn’t say what it actually does. I kept digging and I eventually found a tutorial by Apple that says:
“Personal Hotspot uses a 5 GHz connection by default. On iPhone 12 or later, you can turn on Maximize Compatibility for Personal Hotspot to use a 2.4 GHz connection. “
That confirmed my theory. I was pleased to be right, pleased to find the answer in writing from Apple, but I was glad I found this for another reason. I had stumbled across the Apple Device Support Tutorials at it-training.apple.com/…. If you’re an Apple Certified Support Professional, you already know about these tutorials, but I sure didn’t know they existed.

While this series of tutorials is designed to prepare people for the Apple Certified Support Professional test, the tutorials are available to all of us for free!
The tutorials assume you know your way around Apple devices, so they get you that deeper knowledge you may have been seeking about how things work. I guess that’s two Tiny Tips in one!

That was absolutely brilliant advice! Amazed it works. Thank you.
Yay! Glad it helped.
This didn’t work for me between my iPhone 14 and my new Kindle. Sad as our Internet is out and provider clueless about what the issue is and how to get is back on.
thank you!! you saved me in Mexico!!!
What a lifesaver! Thank you very much!
I have a cheap Kindle e-reader and it won’t find my iPhone’s hotspot. I did turn on the maximize button but still nothing from my e-reader which is 12” from my laptop and 4” from my phone. I can’t find any apps in the Appstore that allows me to tether from an android device to my iPhone. Is this a proprietary issue? I understand that the current admin is trying to crack down on monopolies; is this political? I wanted to download some books from my library to my e-reader while at work and I could not find my iPhone; just their networks. I am now at home and have no luck. My iPhone is an XR and my software is up to date.
And by the way, thank you for your tip. I learn new things about my Apple devices every day. You would think that there could be some more comprehensive way to learn the basics when you buy the devices. I am using the stand by though, it’s a bit of fun even though I already use a regular bedside clock.
Wow…that is really helpful
Maximum compatibility was on I did what you said. Still didn’t work I just got this kindle two days ago. I am not happy. Any other suggestions?
My kindle identifies my iPhone WiFi, but my kindle is asking for a password which I don’t know where to find. Any idea how that piece works?
Thank you!! have been desperate as it didn’t work on my new iPhone 15 pro! Life-saving ❤️advice!
Thank you, that worked perfectly. I’m sure I didn’t have this problem with my previous Paperwhite, and I assumed the new one would work, but it didn’t. Amazon also really need to sort out the Kindle browser.
Interesting also that while my Apple devices will see Hotspot if the phone is off I my pocket, the Kindle will only see it if I open Hotspot on the phone.
Did not work. Then I turned off my iphone VPN and it seemed to work. So perhaps a vpn on the iphone keeps the kindle from connecting.
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Решил, наконец, поменять свою старенькую жигули. Смотрю в сторону Niva или Vesta, но не могу определиться. Granta подкупает своей доступностью, да и отзывы вроде неплохие. Vesta, конечно, выглядит посолиднее и покомфортнее, но и ценник ощутимо выше.
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Преобразователи частоты: принцип работы, применение и выбор
Преобразователь частоты (ПЧ) – это устройство, позволяющее плавно регулировать скорость вращения электродвигателя переменного тока путем изменения частоты и напряжения питающей сети. Это открывает широкие возможности для оптимизации работы оборудования и экономии электроэнергии.
Принцип работы
Типовой ПЧ состоит из трех основных блоков: выпрямителя, звена постоянного тока и инвертора. Выпрямитель преобразует переменное напряжение сети в постоянное. Звено постоянного тока, как правило, содержит конденсаторы, сглаживающие пульсации напряжения. Инвертор формирует переменное напряжение требуемой частоты и амплитуды. Современные ПЧ используют широтно-импульсную модуляцию (ШИМ) для формирования выходного сигнала, что обеспечивает высокую точность регулирования и низкий уровень гармонических искажений.
Применение
ПЧ широко применяются в различных отраслях промышленности:
Насосы и вентиляторы: Регулирование производительности в зависимости от потребности позволяет значительно снизить энергопотребление.
Конвейеры: Плавный пуск и регулирование скорости движения обеспечивают сохранность продукции и оптимизацию технологического процесса.
Экструдеры и смесители: Точное поддержание заданной скорости вращения способствует повышению качества продукции.
Станки: Обеспечение оптимальной скорости обработки различных материалов.
Выбор ПЧ
При выборе ПЧ необходимо учитывать следующие факторы:
Мощность двигателя: ПЧ должен быть рассчитан на мощность двигателя, к которому он будет подключен.
Диапазон регулирования частоты: Необходимо определить требуемый диапазон регулирования скорости вращения двигателя.
Тип нагрузки: ПЧ выбирается в зависимости от характера нагрузки (вентиляторная, насосная, постоянный момент).
Функциональность: Современные ПЧ обладают широким набором функций, таких как защита от перегрузки, перенапряжения, короткого замыкания.
Правильный выбор и грамотная настройка ПЧ позволяют не только повысить эффективность работы оборудования, но и значительно сократить затраты на электроэнергию – Частотный преобразователь 22 кВт