Henry Smolinski And The Flying Pinto

January 5, 2016 by Kristina Panos 33 Comments

Anyone who has ever been stuck in gridlock has probably daydreamed about pushing a button on the dashboard that turns their car into a plane. Imagine how much more relaxing a weekend getaway would be if you could take to the open sky instead hitting the congested highway. For as long as there have been aircraft and automobiles, man has tried to combine the two. The proper term for this marriage is ‘roadable aircraft’, and a successful one requires attention to the aerodynamics of flight as well as the rigors of motoring.

One promising attempt at a roadable aircraft came from Henry Smolinski, an aeronautical engineer in Van Nuys, California. He along with his friend Harold Blake started a company in 1971 called Advanced Vehicle Engineers (AVE) to produce the AVE Mizar. This flying car combined the lightweight Ford Pinto with the wings and partial fuselage of a Cessna Skymaster.

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Current Meter Shows Current Time

January 5, 2016 by Anool Mahidharia 16 Comments

This isn’t the first of its type, but [Daniel]’s MSP430 based Analog Gauge Clock certainly ticks off the “hack” quotient. He admits an earlier Voltmeter Clock we featured a while back inspired him to build his version.

[Daniel] was taking an Embedded systems class, and needed to build an MSP430G2553 microcontroller based final project. Which is why he decided to implement the real time clock using the micro-controller itself, instead of using an external RTC module. This also simplified the hardware used – the microcontroller, a crystal, three analog ammeters, and a few passives were all that he needed. Other than the Ammeters, everything else came from his parts bin. Fresh face plates were put on the ammeters, and the circuit was assembled on a piece of strip board. A piece of bent steel plate served as the housing.

The interesting part is the software. He wrote all of it in bare C, without resorting to using the Energia IDE. He walks through all of the important parts of his code on his blog post. Setting load capacitance for the timing crystal was important, so he experimented with an oscilloscope to see which value worked best. And TI’s Application Note on MSP430 32-kHz Crystal Oscillators (PDF) proved to be a useful resource. Three PWM output’s run the three ammeters which indicate hours, minutes and seconds. Push-button switches let him set the clock. See a short demo of the clock in the video below.

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Get Your Amateur Radio License Already!

January 5, 2016 by Elliot Williams 81 Comments

We run a lot of posts on amateur radio here at Hackaday, and a majority of our writers and editors* are licensed hams. Why? Because playing around with radio electronics is fun, and because having a license makes a lot more experimentation legal. (*We’re sure you have good reasons for slacking, Szczys.)

So let’s say that you want to get your “ticket” (and you live in the USA). It’s easy: just study for an exam or two, and take them. How to study? We’re glad you asked, because we just found this incredibly long video that’ll prep you for the exam.

At six and a half hours, we’ll admit that we haven’t watched the whole thing, but what we did see looks great. Admittedly, we were a little bit unnerved by [John (KD65CY)]’s overdone enthusiasm. But the content is fundamental, broad-ranging, and relevant. Heck, even a bit entertaining.

Even if you’re not interested in taking the exam, but are just interested in some radio basics, it’s worth looking. If you give it a shot, and like what you see, let us know in the comments what times stamps you found interesting.

The other “secret” about the amateur radio exams is that all of the questions and their answers are drawn from a publicly available pool of questions. This means that you can just cram the right answers, pass the exam, and you’ll have your grey cells back good as new in no time. To help you along your path, here are all the current Technician questions with only the correct answer for each. (And here is the Python script that generated them.) Read through this, take a couple of practice exams, and you’ll be ready to go.

In our experience, the Technician exam is easy enough that it’s probably worth your while to study up for the General exam as well. You have to take the former before the latter, but there’s nothing stopping you from taking them all in one sitting. (General gets you a lot more international shortwave frequencies, so it’s at least worth a shot.)

But don’t let that slow you down. Just getting the Tech license is easily worth studying up for a couple of hours or so. You have no excuses now. Go do it!

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