Compatible alternative power cable for Acer Aspire R7

Looking up an Amazon-sold 19V 3.42A 65W replacement AC adapter for a colleague's Acer Aspire R7.

Solution When AirMac Express Wi-Fi Won't Connect

Fixing a stuck AirMac Express Wi-Fi connection with a power cycle, or the reset button as a fallback.

How to initialize (reset) AirMac Extreme

The reset button location on AirMac Extreme, plus the soft reset and factory default reset procedures.

Is it correct to understand that AirMac Extreme's maximum simultaneous connections is 50?

Confirming AirMac Extreme's 50-user simultaneous connection limit from Apple's official specs.

AirMac Extreme doesn't have built-in VPN server functionality

AirMac Extreme lacks a built-in VPN server, so use VPN passthrough with a LAN-side VPN server instead.

Configuration Method for Setting Up Two AirMac Extreme Units

Extending Wi-Fi with two AirMac Extreme units: factory reset, Google Public DNS, and reference links.

AirPods Pro + Android Low Volume Issue Can Be Solved by Resetting

Resetting AirPods Pro was the quickest fix for the low-volume issue when pairing them with an Android phone.

『Anker Magnetic Cable Holder』is recommended over『Anker 結束バンド式 ケーブルホルダー (Easy-Fastening Cable Holder)』

The Anker Magnetic Cable Holder felt far more stable than the Easy-Fastening Cable Holder in day-to-day desk use.

Purchased 'Apple USB-C - 3.5 mm Headphone Jack Adapter MU7E2FE/A' to use wired earphones with MacBook Pro

A short note on buying Apple's USB-C to 3.5 mm headphone jack adapter for MacBook Pro.

How to stop the secondary SSID on Aterm WR8750N

How to disable the secondary SSID on the Aterm WR8750N router from the Quick Setup Web UI.

Resetting Aterm WR8750N to factory default state

How to factory-reset the Aterm WR8750N router with the physical RESET switch.

Standing Desk Mat Bauhutte BHA-70G is Comfortable 🙆

A short review of the Bauhutte BHA-70G standing desk mat used with a FLEXISPOT E7.

Mac app 'Disk Speed Test' for HDD and SSD disk speed testing

Blackmagic Disk Speed Test — a free Mac App Store tool for benchmarking HDD and SSD read/write speeds.

Solution for Brother HL-L2375DW Stuck on 'Printing-Looking for printer' Issue on macOS

Notes on fixing a Brother HL-L2375DW stuck at 'Printing-Looking for printer' on macOS with a simple restart.

[Mac] Connecting MacBooks and iMacs with LAN cables

Direct-connecting two iMacs with a LAN cable and letting DHCP assign IPs automatically.

Set Up a New Laptop the Day It Arrives — What HP's 7-Day Dead-on-Arrival Rule Taught Me

A new laptop arrived defective, but I was slow to notice and nearly missed HP's 7-day dead-on-arrival window. The conclusion is simple: set up and test a new laptop the day it arrives.

I Purchased ELECOM 'ZEROSHOCK Inner Bag' PC Case for MacBook

Why I picked the ELECOM ZEROSHOCK ZSB-IBN15BK inner bag for MacBook, with the slimmer ZSB-IBUB04BK as an alternative.

Useful information for getting internal approval for engineer PC renewal

How I got internal approval for an engineer PC refresh — angles, references, and depreciation timing.

Fire HD Kids Model Amazon Kids+ Initial Setup and Recommended Time Limit Settings

Initial Amazon Kids+ setup and recommended time limits for the Fire HD 8 Kids Model.

When the Fire TV Remote Stops Responding — Why an Overnight Rest Fixes It, and the Right Power Reset

My Fire TV remote suddenly stopped responding. New batteries did not help, re-pairing did not help. I gave up, left it overnight, and the next morning it worked as if nothing had happened. As an engineer, a fix with no known cause is the most unsatisfying ending of all. Here I break down why an overnight rest works, through Bluetooth pairing state, residual charge, and the Fire TV OS input process, and I lay out the power reset that fixes it in minutes rather than a night.

I Purchased the Electric Standing Desk FLEXISPOT E7

The configuration, price, and setup photos of my new FLEXISPOT E7 electric standing desk.

How to Reset FLEXISPOT E7 When One Leg Tilts

How to reset the FLEXISPOT E7 electric standing desk from the controller when one leg tilts.

PFU HHKB Professional HYBRID Type-S Cannot Be Charged via USB Type-C

The HHKB HYBRID Type-S can't be recharged over USB Type-C by design — swap the AA batteries.

Purchased PFU Keyboard HHKB Professional HYBRID Type-S English Layout / Charcoal

I picked up the PFU HHKB Professional HYBRID Type-S English layout (Charcoal) and paired it with multiple macOS machines.

Purchased 'HHKB Typing Bed PW-HHC-2'

A walkthrough of buying the HHKB Typing Bed PW-HHC-2 and the roughly four-month wait until it arrived.

HUAWEI Band 7 Smartwatch Review

A short review of the HUAWEI Band 7 — pairing, and swapping the quickly broken original band for a stainless one.

[Mac] How to identify whether Intel CPU is 32-bit or 64-bit

Reference links for checking whether an Intel Mac has a 32-bit or 64-bit CPU.

[Mac] How to Swap Control and CapsLock Keys on US Keyboard

Swapping Control and CapsLock on a Mac US keyboard from System Preferences → Keyboard → Modifier Keys.

Purchased『MacBook Pro 14 インチ 2021年モデル (M1 Pro / M1 Max) 用 マグネット式 プライバシーフィルター』

A quick note on getting a magnetic privacy filter for the 14-inch MacBook Pro (M1 Pro / M1 Max).

MacBook Pro 2018 (13 inch) PC case 'KIZUNA' purchase report

A purchase report on the KIZUNA PC case bag for the 13-inch MacBook Pro 2018.

[Android] How to Fix Nexus7 When It Won't Start

Bringing a fully discharged Nexus 7 back to life with a long power-button press or the power + volume-key combo.

[Mac] NTT Flets Hikari Connection Setup Method

A memo of the reference link I used to set up NTT Flets Hikari PPPoE on Mac.

NURO Biz ONU doesn't have router functionality

A note that NURO Biz's ONU (Huawei-EchoLife HG8040H) has no router functionality, unlike NTT's.

Points for Choosing Power Strips

Selection points and a shortlist of cost-effective power strips for a new office.

I Purchased Okamura's Baron Chair

The articles I referenced before choosing Okamura's Baron Chair as my home office chair.

How to Show Developer Options on OnePlus 6T

Tap Build number seven times to unlock Developer options on the OnePlus 6T.

Data Migration from OnePlus 6T to Google Pixel 6

Reference articles I used to migrate from OnePlus 6T to Google Pixel 6.

PC cleaning methods and procedures

PC cleaning supplies and a step-by-step procedure — sticker removal, dust, screen — plus labeling rules for company-issued PCs.

Recommended PoE-compatible network hubs [Spring 2016]

PoE network switches recommended by a LAN contractor in spring 2016: BUFFALO and NETGEAR.

APN Settings to Use Rakuten Mobile on Android OnePlus 6T

APN settings and LTE-only switch for running a Rakuten Mobile SIM on Android OnePlus 6T.

Lesson learned: Check router's DHCP allocation limit when you get 'Cannot connect to internet due to self-assigned IP address' error

The lesson: when Wi-Fi hits a self-assigned IP error, check the router's DHCP allocation limit — mine was capped at 32.

For Sakura Cloud and VPS CPU specifications, you have to check cpuinfo yourself

Sakura support won't share physical host CPU specs — you have to check /proc/cpuinfo yourself.

MacBook Pro 2018 compatible 'Satechi Thunderbolt 3 (USB-C) Multi Hub' purchase report

A photo unboxing report of the Satechi Thunderbolt 3 (USB-C) Multi Hub, purchased for a MacBook Pro 2018.

Mobile SSH client 'ServerAuditor' is convenient for use on Android and iPhone!

Notes on setting up the ServerAuditor mobile SSH client on iPhone — SSH key loading and console scrolling.

[Shell Script] Commands to Get CPU Core Count

Getting the CPU core count on Linux by grepping `processor` in `/proc/cpuinfo`.

It's better to spend money on routers rather than internet connections

A colleague's advice on spending money on routers rather than internet connections, with recommended and avoided models.

I bought a Spigen Pixel 7 case

About a year of using the Spigen Pixel 7 case, and its wireless charging and NFC limitations.

Tile Pro/Slim/Sticker Smart Tracker (Anti-Loss Tag) Review

My review of Tile Pro, Slim, and Sticker smart trackers, including a dead-on-arrival Sticker unit.

[WiMax] How to Fix Connection Issues with Aterm WM3600R

Reference notes for fixing frequent Wi-Fi disconnects on Aterm WM3600R.

[Windows7] How to Set Up English Keyboard

Registry edits to switch Windows 7 to a US English keyboard layout.

Minimum specifications required for Windows 7 operation

Windows 7 minimum system requirements quoted from Microsoft's official spec.

Upgrading Windows 7 to Windows 10 (Lenovo G550, Backup, Memory Upgrade)

Upgrading a Lenovo G550 from Windows 7 to Windows 10 and bumping RAM to 8GB.

[Wi-Fi] Difference between 'wireless connection/joining' and 'simultaneous communication after wireless connection'

Q&A memo distinguishing Yamaha WLX302's wireless connection limits from its simultaneous communication limits.

Review of Smartwatch Xiaomi Mi Band 4

A personal review of the Xiaomi Mi Band 4 after 2.5 years of daily use.

Xiaomi Mi Band 5 Smartwatch Review

A personal review of the Xiaomi Mi Band 5 smartwatch used as an alarm, and the Zepp Life app needed for initial setup.

[Android] Xperia SO-01E powers off forcibly when launching Google Maps

A note that the Xperia SO-01E's forced shutdown on launching Google Maps was fixed by a software update.

[Android] Xperia SO-01E was extremely slow, so I deleted/disabled unnecessary apps

A list of the Docomo and Sony preinstalled apps I deleted and disabled to make a slow Xperia SO-01E usable again.

[YAMAHA RTX1210] How to Configure DHCP Reserved Addresses

Configuring a DHCP reserved address on the YAMAHA RTX1210 VPN router, with the commands I ran from the maintenance console.

YAMAHA WLX302 Configuration

Notes on the YAMAHA WLX302 wireless AP — max client counts, link-speed channel profiles, and SSID operation plans.

Computer Shipping, Delivery, and Distribution Methods

A short recommendation for shipping computers safely in Japan using Yamato Transport's PC Takkyubin service.