Microscope software for OSX

andonstar USB microscopeGot myself an Andonstar 2 megapixel USB microscope about a year ago, mainly just for testing it out, and having it readily available when some repair project demanded it. The microscope is actually pretty nice given its ca USD 60 price point, with decent picture quality, a sturdy stand (even though it’s somewhat of a pain adjusting it) and a built-in adjustable light source.

To be honest it hasn’t been used much (it did come in handy during the repair of the BK Precision LCR meter though).. but this is in part due to the lack of good OS X software for use with generic USB microscopes. Over the past year I have tried some video software, and still have a few on the try-these-out-list.

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Upgrade to Windows 10 on VirtualBox with OSX host

Windows 10Lots of OS upgrades lately, Windows went to Windows 10 and Apple to El Capitan. I am usually pretty ok upgrading to Apple’s latest OSs a week or two after their release – they are usually of good quality.

As VirtualBox (“VBox”) also came out with their version 5 release, it was time to upgrade the Windows 8.1 virtual machine (“VM”) running in VBox, with OS X as host.

Turns out this is (of course..) not as easy as one would think – but still possible.
Here we will walk through the steps of

  • Extending the Windows 8.1 virtual disk in VBox
  • Forcing the Windows 10 installer to run, even though its hardware compatibility checker says the VBox machine is not compatible with Windows 10
  • Installing the VBox Guest Additions in the Windows 10 VM.

Before doing any of those steps, you might want to upgrade to OS X El Capitan, and to latest Virtual Box (5.x as of this writing).

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Making OS X awesome – one tool at a time (part 2)

The previous post listed some of my favourite OS apps, but there are a few more that also make everyday life easier. When thinking about it, the apps below are just as useful and important as the ones in the previous post. The apps are:

  • Wunderlist: Todo tracking
  • Carbon Copy Cloner: Best backup
  • CrashPlan: Buddy backup
  • f.lux: Late night screen glow
  • 1Password: Personal, private passwords

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Making OS X awesome – one tool at a time (part 1)

Being fairly multilingual – I use Macs, Windows and Linux boxes daily – OS X has during the last 4-5 years been the main platform for daily work. And as much as I like the way OS X has developed over the years (including the fact that it’s free once you have bought a Mac!), even the sun has spots.

So let’s see how we can make a good OS X system truly awesome.

In this first of several posts we’ll look at these tools:

  • Skitch: Super screenshots
  • Evernote: Neverending notes
  • iTerm2: Command line karma
  • Alfred: Always automation
  • Slack: Champion chat
  • Tyme: Timely time tracking
  • Moom: Windows whereabouts

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Wake-on-lan workaround for OSX Yosemite on Mac Mini

Turns out that OS X Yosemite on Mac Mini does not support standard Wake-On-Lan (“WOL”), at "EthernetCableBlue2" by Raysonho @ Open Grid Scheduler / Grid Engine - Own work. Licensed under CC0 via Wikimedia Commons - https://commons.wikimedia.org/wiki/File:EthernetCableBlue2.jpg#/media/File:EthernetCableBlue2.pngleast not when using the built-in Ethernet port.
Which is strange – but when trying to make the media server attached to the household’s TV a bit more energy efficient, I just couldn’t get that Mac Mini to come out of sleep using a WOL magic packet. Others out there report the same thing, so it’s not an isolated issue for me. Just to rule out issues with the WOL client used, I tried waking Windows and Linux machines from sleep – worked flawlessly. Weird.

There was however an easy workaround:

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Start Node-RED on OS X login

Node-RED flow for controlling a Blink(1) USB indicator light
Node-RED flow for controlling a Blink(1) USB indicator light

Node-RED is a truly awesome framework for visually building data flows. There is a lot of focus on wiring together hardware devices and Internet of Things, but there are also plenty of modules for connecting to email, social media, various online services etc.

After using it during some months I can confirm that stability is absolutely fine, don’t think I have had a single issue with the setup due to Node-RED itself.

Version 0.10.1 came out a week or so ago (early Feb 2015) and brought things like better partitioning of flows in the form of subflows, improved Raspberry Pi support, binary MQTT payloads to name just a few of the improvements.

I am running Node-RED on an always-on Mac, running latest OS X. This machine is very stable but for various reasons I do need to restart it every now and then. It would then be very nice to have Node-RED start automatically at boot. That’s somewhat complex to do, but having an app starting at login is trivial – let’s do that instead. I am always logged into this computer anyway, so it won’t be a problem.

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How to get OS X 10.9 Mavericks and Arduino IDE to play nicely with each other

Apple tried to be smart with OS X Mavericks, developing their own FTDI drivers. Just too bad they don’t seem to work.

I have been getting nothing but “avrdude: stk500_recv(): programmer is not responding” errors when trying to upload sketches to various Arduino compatible boards.
In the end, the only thing that worked was programming the boards using a dedicated programmer (in my case an USBasp).

Some digging around forums and Apple’s support site, the following steps has solved the issue on all the OS X machines where I have tried it. In short, you need to replace Apple’s drivers with the ones from FTDI.

  1. Open a terminal
  2. cd /System/Library/Extensions/IOUSBFamily.kext/Contents/PlugIns
  3. sudo mv AppleUSBFTDI.kext AppleUSBFTDI.disabled
  4. sudo touch /System/Library/Extensions
  5. Restart computer
  6. Install FTDI’s virtual COM port drivers from http://www.ftdichip.com/Drivers/VCP.htm. In version 2.2.18 this package contains two executable files, I have had success with the one named FTDIUSBSerialDriver_10_4_10_5_10_6_10_7
  7. Restart again (might not be needed, good practise though after installing drivers)

Voila – The Arduino IDE can now upload sketches to all boards I have tried, both with the old/legacy bootloader and Optiboot.

Burning ISOs to USB sticks on Mac / OS X

For some reason i cannot get the easy-to-use tools out there for burning ISOs to work… Command line to the rescue:

First, make sure Homebrew is installed. It is strictly not needed for the burning-to-thumb-drive process, but will enable the progress indicators, which are quite nice to have for long running tasks. Now install Pipe Viewer from Homebrew:

[code language=”bash”]

$ brew install pv


Now we need to figure out the device name of our USB drive. In a terminal window (you are using iTerm2 – right? Infinitely better than OS X built in Terminal app):

[code language=”bash”]

$ diskutil list

0: GUID_partition_scheme *251.0 GB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_HFS Macintosh HD 250.1 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
0: GUID_partition_scheme *320.1 GB disk1
1: EFI EFI 209.7 MB disk1s1
2: Apple_HFS SSD backup 180.0 GB disk1s2
3: Apple_HFS Temp 139.6 GB disk1s3
0: GUID_partition_scheme *1.0 TB disk2
1: EFI EFI 209.7 MB disk2s1
2: Apple_HFS Macken_Ext Backup 999.9 GB disk2s2
0: FDisk_partition_scheme *8.0 GB disk3
1: DOS_FAT_32 WHEEZY 8.0 GB disk3s1


/dev/disk3 is the USB thumb drive. I previously had another Wheezy image on it, thus its name.

Now unmount it:

[code language=”bash”]

$ diskutil unmountDisk /dev/disk3
Unmount of all volumes on disk3 was successful


Nice. Now let’s write the ISO to the drive:

[code language=”bash”]

$ pv -petr ~/Desktop/debian-7.2.0-amd64-DVD-1.iso | sudo dd of=/dev/disk3 bs=128k
0:00:38 [4.94MiB/s] [====>                  ] 3% ETA 0:16:55


Now let’s wait. Looks like it will take approximately another 17 minutes..

When done, just eject the thumb drive as usual, remove it and you have a bootable Debian install drive. Mission accomplished.

iTerm2 + tmux + Fish = looks great!

If you spend any time at all at the command prompt in OSX or other Linux-ish systems, tmux is a must. Basically it gives you persistent shell sessions, once using it you’ll wonder how you ever got by without it… 

For OSX the easiest way to get tmux is via (the also excellent) Homebrew. After installing Homebrew, just do a 

brew install tmux

from a OSX prompt (you ARE using iTerm2, right? …Rather than OSX’s rather horrible built-in Terminal app…?)

Add to the mix the nice Bash replacement Fish, which gives you all sorts of command line goodness (color coding, auto-completion, …). Very nice!