Doogie's Blog

Fluke Scopemeter 97 EL Backlight Repair

I have a Fluke ScopeMeter 97 that's come in really handy over the years. Before I got it, it was a sales rep's demo unit, so it was used pretty hard. The screen backlight is an electroluminescent panel, and their intensity can fall off pretty dramatically over it's life. This particular display is also transflective, which makes it extremely readable under direct sunlight, but means the backlight is essential to using it in indoor lighting. To use it in the past, I'd shine a bright desk light on it, but I've always wished the backlight would just work.

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VW GTI Amateur Radio Cubby Mount

After I tackled the antenna installation, I had to get the radio installed. I've seen several different ways of approaching the issue, but I've never seen one I was really happy with. Here's what I did for a seamless install.

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Capacitor Plague (Part II)

In Part I, I discovered my monitor suffered from the capacitor plague. I ordered new capacitors to repair it and received them a few days later.

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Capacitor Plague (Part I)

I have a pair of Acer LCD monitors that I have used since 2006. They were super-cheap when I bought them, but have worked well enough over the years. Some time last year, one of the monitors started having dark lines skittering through the image the entire time it was on. Knowing that it was over 6 years old, I figured one of the backlight tubes was dying and I finally decided to take it apart.

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Move Windows with Hotkeys

This is a more complicated example of what can be done using AutoHotKey. I use this script every day at work and pretty much consider it indispensable when using multiple monitors.

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Five CubeSats Deployed from the ISS

On 4 Oct 1957, the space race began — Russia successfully placed the first artificial satellite, Спутник-1 (Sputnik-1), into orbit around Earth. Sputnik was placed directly into orbit by a single stage rocket. It's payload was a simple radio transmitter that alternated between two frequencies. There were no sensors, or cameras, or solar panels. Some of the smartest people in the world were working on the rocket and satellite designs, at a time when the first commercially-made transistor was only 3 years old. Integrated circuits, ICs or 'computer chips' hadn't even been invented yet!

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Completed Mount

VW GTI Antenna Mount

I've been thinking about how to mount an amateur radio antenna on my car for a while now. Everyone says the best way is to use an NMO mount in the center of the roof. But since I have a small car with a sunroof, there is only a small area of the roof near the back where it would be feasible. A backup option is usually a semi-fixed mount on the trunk, but my car is a hatchback so a magnetic mount will not work and there aren't any edges straight enough for a lip mount. Looking at all the various ways people have mounted their antennae, I ran across one person who had used a license plate frame mount under the bolts on their hood hinge. Looking at this location on my car led me to think this would be a really good location to mount mine. I got my father to help since he has the tools needed and we came up with a mount.

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F-Script Injection in Lion

I wanted to use the very handy F-Script environment to snoop around inside an application. F-Script can be injected into running applications by using gdb, which of course works fine, but they also provide a services-menu item for performing the injection. Due to several changes in OS X 10.7 Lion, the automator workflow that came with F-Script to perform this did not work.

I reworked the injector service so it works on Lion and doesn't leave behind (or even create) any temp files.

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Screenshot of PDF Maps, showing geolocation dot exactly over shelter icon.

Georeferencing Trail Maps for PDF Maps on iOS

When I first got an iPhone, one of the first app ideas I had was one that would let me take a trail map image, mark a few known coordinates, then use the GPS to display the blue dot like in the built-in Maps app. I've searched for something similar a few times, and had actually started doing some research into libraries for doing the math. This weekend, I thought I'd search one more time, and there was actually a free app recently posted called PDF Maps by Avenza.

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