Setting Path Environment Variable on Windows 10

The steps below shows how to set a file/folder path to the ‘Path’ System Environment variable on Windows 10.     Steps 1. Right-click on Windows start menu icon at the bottom-left corner of the desktop (or Ctrl-x), then select “System”   2. Click on “Advanced system settings” on left side of the “System” window.… Continue reading “Setting Path Environment Variable on Windows 10”

Enabling Webcam in VirtualBox Guest OS on Windows Host

This post shows steps to enable webcams in a VirtualBox guest OS on Windows host. OS/software and the version I used are below. I tested it with Microsoft Surface Pro 4 and Dell Precision 3510. Host: Windows 10 running VirtualBox 5.2.6. Guest: Ubuntu Linux 16.04.03 / Mac OS X High Sierra   Here is the steps. Steps 1. Install ‘Oracle… Continue reading “Enabling Webcam in VirtualBox Guest OS on Windows Host”

Creating Wireless Router using Raspberry Pi Zero W

This post shows steps to set up Raspberry Pi Zero W as a wireless router. I tested it with Raspbian Buster Lite (September 2019 version) on Raspberry Pi Zero W and this USB WiFi adapter. [Updated on 11.25.2019] The figure above shows overview of the idea. Here are some assumptions: Raspberry Pi Zero W (the… Continue reading “Creating Wireless Router using Raspberry Pi Zero W”

Disabling Bluetooth on Raspberry Pi

This post shows steps to 1) disable on-board Bluetooth and 2) disable Bluetooth completely. I tested the steps with Raspbian Stretch (November 2017 version). Update (Jul 9, 2019): Tested with Raspbian Buster 2019-07-10.   Disabling on-board Bluetooth The steps below shows how to disable on-board Bluetooth and related services. Those steps also disable loading the related kernel… Continue reading “Disabling Bluetooth on Raspberry Pi”

Lightning Bolt (Under-Voltage Warning) on Raspberry Pi

If a lightning bolt image appears in the top-right corner of the screen, it means Raspberry Pi is not getting enough voltage (4.65V according to this forum post). To prevent it from showing up, there are two options.   1) Replace Power Supply and/or Cable (Recommended) In most cases, it’s due to the power supply and/or… Continue reading “Lightning Bolt (Under-Voltage Warning) on Raspberry Pi”