Author: Dave Farquhar

Hart electric mower won’t start? Try this.

Dave Farquhar DIY
Hart electric mower won’t start? Try this.

I’m seeing a lot of people complaining that their year-old Hart electric lawn mower won’t start anymore. I don’t think that’s a coincidence at all. If your Hart electric mower won’t start all of a sudden, here are some easy things to try. It’s frustrating, but not difficult to fix.

When your Hart electric mower won’t start, it’s usually one of three things. It’s often the battery, the handle not being fully extended or locked, or the discharge, all of which are fairly easy to fix.

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Convert Marx 7-inch to 8 wheels

Dave Farquhar Toy trains
Convert Marx 7-inch to 8 wheels

There’s a lot less interest in Marx’s short-lived 7-inch line, than in their other lines, but they can be useful cars. For example, with the appropriate trucks under them, they can add some variety to Marx’s metal scale cars. While they’re not quite 1:64 scale in most cases, they’re close enough that they look fine with them. Here’s how to convert Marx 7-inch to 8 wheels.

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Tandy 1000 vs Commodore 64

Dave Farquhar Retro Computing
Tandy 1000 vs Commodore 64

In early 1984, IBM released its first home computer, the IBM PCjr. Commodore won that battle handily. But in late 1984, Tandy released its idea of a a PCjr-done-right, the Tandy 1000. When it comes to the Tandy 1000 vs Commodore 64, Commodore didn’t do as well. The Tandy 1000 eventually overtook the Commodore 64 to become the best-selling computer in the United States.

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Samsung QVO vs EVO

Dave Farquhar Hardware
Samsung QVO vs EVO

I saw a question come up the other day about two different Samsung drives. One of them is more expensive than the other, and that can certainly lead to questions, not to mention potential mistakes. So let’s talk about the difference between a Samsung QVO vs EVO.

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What nickel silver track is

Dave Farquhar model railroading
What nickel silver track is

If you are into model trains, you’ve probably seen the words nickel silver on the packaging for track, or you’ve seen track advertised as being made of nickel silver. But what is nickel silver, and is it a good thing or a bad thing?

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What happened to Sega

Dave Farquhar Retro Computing
What happened to Sega

When I was in high school, the console to have was the Sega Genesis. While Nintendo thrived, Sega carved out a niche for itself catering to a more mature audience that had outgrown Mario. And for a few years, it worked really well, until it didn’t anymore. What happened to Sega? Why did Sega stop making consoles? Does Sega even still exist?

Sega hasn’t made a game console since 2001. After the commercial disappointment of the Sega Dreamcast, Sega tried, successfully, to reinvent itself as a software publisher.

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What is solder made of?

Dave Farquhar DIY
What is solder made of?

Solder is a mixture of relatively low melting point metals, designed to melt at a lower temperature than metals like copper. This allows you to join components, providing a strong chemical bond that is electrically conductive. So what is solder made of? It’s made of a special mixture of metal. Frequently it also contains a core with chemical additives to make it easier to work with.

The precise formulation of both the solder alloy and the core varies depending on the application. But, generally speaking, solder is made of an alloy of low melting point metals.

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f strings in Python

Dave Farquhar Software
f strings in Python

When you first encounter f strings in Python, they can seem like a dark art. And you can use them without understanding them. I’ve used f strings to get myself out of a bind, based on a code snippet I found on Stack Overflow or some other discussion board, with a comment saying not to ask me why it works. But here’s what they do and how they can help your code.

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In memoriam: Angel, 2005-2022, best dog ever

Dave Farquhar Personal
In memoriam: Angel, 2005-2022, best dog ever

It was the summer of 2006. We had been married a little over a year, and we decided together it was time to get a dog. We started looking, and buying the stuff we needed. Then one fateful Saturday, we took a trip to the Humane Society on Macklind Avenue.

We had a good idea what we were looking for. We had no idea we were going to find all that and more.

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No Ox ID for model railroading

Dave Farquhar model railroading
No Ox ID for model railroading

In 1965, Linn Westcott, the longtime editor of Model Railroader magazine, wrote an article about how he never cleaned the track on his layout. His secret was a product called No Ox ID A Special. Let’s talk about No Ox ID for model railroading.

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