David L. Farquhar on technology old and new, computer security, and more
The Timex Sinclair 2068 was the US version of the much more popular Sinclair ZX Spectrum, one of the most successful home computers of the 1980s in the UK. The 2068 unfortunately didn’t match its British brother’s success.
Timex withrew from the US computer market in February 1984, soon after the release of the Timex Sinclair 2068, one of the early casualties of the home computer wars. The 2068 proved to be the last of Timex’s home computers.
I spent years racing Hot Wheels cars in the basement with my cousin. As kids, we didn’t necessarily know why this was, but some Hot Wheels cars were definitely faster than others, even if you compared two examples of the same car. But once you understand why, it’s possible to make a car fast. Here’s how to make Hot Wheels go faster.
The keys to speed generally are reducing friction and increasing weight. Some of these modifications are reversible and others aren’t, but they provide a number of options for increasing the speed of a Hot Wheels car.
What is a phreaker in hacking or IT terms? Phreaking is largely obsolete and doesn’t happen much anymore, but it’s an important historical concept in computer security. While phreaking wasn’t the first form of hacking, it’s probably the first example of hacking in a modern sense.
Phreaking was hacking the phone system, usually to make long distance calls for free. Some people phreaked for the thrill of it, but many of them did it because they made more long distance calls than they could afford. Two famous phreakers from the 1970s were Steve Jobs and Steve Wozniak, the co-founders of Apple.
Programmable thermostats used to be really expensive. But today, you can get one for as little as $25, about the same price as a non-programmable digital thermostat. But should you get one? Do programmable thermostats save money? Do they save energy?
If you have a conventional forced-air furnace and air conditioner, a programmable thermostat can save you $25 a month or more, especially in the summer and winter. But not if you have a heat pump. If you have a heat pump, you probably know it.
What would cause a train to run better backward than forward? If it can go one direction it should be able to go the other just as easily, right?
When a train runs better backward than forward, that’s an indication of uneven wear. That doesn’t necessarily mean it’s an expensive repair though.
What is a multi core processor? Why are they necessary? Multi core processors saved Intel’s bacon in 2005 when the Pentium 4 CPU failed to meet expectations, and they led to noticeable changes in the way computers are designed and marketed.
A multi core processor is a processor with multiple processor cores on a single chip. This gives improved performance, though performance doesn’t scale linearly.
Am I saving enough for retirement? What about you? It’s not necessarily an easy question to answer off the top of your head. The answer is, most people aren’t. Here’s what you can do about it.
The average person doesn’t have enough saved for retirement. Increasing 401(K) or other IRA contributions is the best way to fix that, and the maximum contribution may be higher than you think.
Are stocks safe to invest in? All the disclaimers that you see at the bottom of stockbroker web pages sure makes it sound like they’re not. But the alternatives aren’t necessarily completely safe either. Here’s how to understand how stocks work, and whether you should put your money in them, or elsewhere.
Fear of stocks generally comes from not understanding what they are or how they work. There are ways to make them safe, and with reasonable precautions, their higher yield makes them safer in some ways than traditional “safe” investments.
What are keywords for SEO? They’re absolutely fundamental for understanding SEO, but I think many people overcomplicate them. Here’s an explanation for the rest of us.
Keywords are phrases that people type into search engines. Search engines use them to figure out what a web page is about, and then try to match readers with web pages.
1:43 scale is a popular size for diecast vehicles. It matches the size of O scale trains in the UK. It doesn’t match the size of US O scale trains. But how big is 1:43 scale? And should you care about the difference?
A 1:43 vehicle is about 4.5 inches long, which is about 10% oversize compared to 1:48. You’ll notice the difference if the two are side by side, but there are ways to compensate for the difference too.