An Introduction To CNC Machine Control

We recently gave you some tips on purchasing your first milling machine, but what we didn’t touch on was CNC (Computer Numerical Control) systems for milling machines (or other machines, like lathes). That’s because CNC is a complex topic, and it’s deserving of its own article. So, today we dive into what CNC is, how it works, and ultimately if it’s right for you as a hobbyist.

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Chemical Hacking At A Store Near You

Imagine for a minute that you aren’t an electronic-savvy Hackaday reader. But you find an old chemistry book at a garage sale and start reading it. It has lots of interesting looking experiments, but they all require chemicals with strange exotic names. One of them is ferric chloride. You could go find a scientific supply company, but that’s expensive and often difficult to deal with as an individual (for example, 2.5 liters of nitric acid costs over $300 for a case of six at a common lab supply company). Where would you go?

As an astute electronics guy (or gal) you probably know that ferric chloride is common for PCB etching, so you would check the electronic store down the street or maybe Radio Shack if you are lucky enough to find one that still stocks it.

So sometimes knowing where to look for a chemical is a key part of acquiring it, especially when the names are not the same. For example, do you have any amylose? No? That’s corn starch. Want to try making your own cadmium sulfide light sensor? Go to the art supply store and ask for cadmium yellow pigment. Need magnesium carbonate? Stop by a sporting goods store and ask for athlete’s chalk.

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Crack Mike Tyson’s Punch Out Bang Bang Passwords

[Bisqwit] has feelings about games that use exclamation points in his idiosyncratic walkthrough of all the nuances of the passwords in the famous Punch Out Bang Bang.

As he states in his deeply weird (though in no way wrong) channel intro, when he’s not driving a bus or teaching Israeli dance, he works hard to understand the things around him. Naturally, a mysterious phone number shaped set of digits in a favorite game was a secret worth extracting.

The digits can represent every possible state in the game.  It uses a pretty simple decoding and encoding scheme, which he walks through. As he says, it all becomes clear when you can see the source code.

After working through all the quirks he is able to arbitrarily generate any state in the game and handle the exceptions (such as Nintendo USA’s phone number). You can see all his code here and try it out for yourself. Video after the break.

We’ve grown to respect [Bisqwit] as the explainer of all things console games. You will like his explanation of how to write a code emulator for an NES CPU.

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