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You are correct that the purple LED will not need a resistor, and that the yellow one would be better off with one. Heat will not be an issue in any case.
Also, you might be disappointed in the price/performance ratio of those radio shack LEDs. ;)The cap is not required; some people like to put them across the power supply, in location C4.
My impression– for a few different reasons –is that it will not work, at least not yet. There are some unresolved issues with Leonardo and ArduinoISP that have been reported in the forums.
Additionally, it may not be possible to use the Leonardo for this because of the pin routing– apparently it’s SPI pins are not fully shield compatible: http://petervanhoyweghen.wordpress.com/2012/09/16/arduinoisp-on-the-leonardo/The Hershey Fonts are given in a slightly unusual ascii code, based on the distance from the letter “R” in the alphabet. Our extensions use that code, translated slightly into numeric values, with different codes for move and lift (M, L).
See these two references for more about the original formats:
http://emergent.unpythonic.net/software/hershey
http://www.ghostscript.com/doc/current/Hershey.htmYou can certainly change the range of excluded characters as well, to make it accept any value that you like. If you need to type a character that isn’t in the ascii range, you’ll need to improvise somewhat, as the only input presently available is from the keyboard.First off, the Hershey Text extension included with the Eggbot distribution is the same version that was released on our web site.
So far as I remember, the fonts that we adapted did not directly include these extra symbols. The symbols included are displayed with the glyph table, and we did not edit or remove any symbols intentionally. There are *some* distributions of *some* of the fonts that do include international characters, however it appears that they were not in the data that we started with. And some of the symbols, such as the Euro are obviously not in the font data, as that data predates the Euro symbol by quite some time.
We can certainly create new fonts and characters, and there have been other requests to do so. Probably the first step should be to build a modern Hershey font editor– perhaps based in Processing –so that we can begin to add these and other requested font characters.
I don’t immediately see any way to get that functionality without reprogramming or external hardware, but it would be reasonably straightforward to do it with reprogramming. As it is, additional triggers do not reset the timing, but are ignored or (if the option is selected) cancel the trigger.
The issue with the voltage regulator is not that it isn’t rated for the voltage, it’s that it drops too much power. If you have 24 V in, 5 V out, at 100 mA, that’s 19 V * 0.125 A (max), or 2.375 W of power– more than the PCB can dissipate. You can get around this by adding a big enough heat sink, or moving the regulator off board, and heat sinking it to the metal chassis of one of your instruments.I’m not sure exactly what you’re asking about.
The Diavolino itself does not fit on a breadboard (it’s too wide), but you can fit small breadboards on top of the Diavolino. (For example, on a Googly Shield: http://evilmadscience.com/productsmenu/tinykitlist/438-googly ) However, it is definitely possible to wire up many things from the Diavolino to breadboards.The Diavolino itself uses much, much less power than USB can supply. USB can normally supply up to 500 mA, and the Diavolino itself never draws more than 1/10 of that. But, you can hook things up to the Diavolino that would draw much more than the computer can source. So, your computer may have been right, but it depends what you had hooked up, and where and how.
Hello Ragnar,
The easiest way is to post a link to the PDF; we don’t support file uploads on the forum.-WindellClarification: The extended firmware ought to do this if you add a pair of wires that loops from one edge to the other.
Again, it’s my guess. If not, then it would indeed be a “similar” change to make it so.
My guess is that the extended Larson firmware would already do that, if it keeps scanning in one direction until it finds the edge— if there isn’t one.
Yes, Yes, Yes, No (but the day of week is calculated internally, and it would be relatively straightforward to display it), not certain.
A lot depends on what exact materials you plan to cut, how big they are, how often, and how much precision you need.But… My impression of this type of machine is that it’s not really rigid enough for use in cutting metal. Certainly, you *can* do so. But, if you’ve used other machine tools in the past, you’ll find that it flexes *much* more than you’d like for precision metalworking at reasonable speed. And amongst machines of this sort and price, the Sherline doesn’t come to mind as the best of breed. Once you add a CNC package, you’re looking at $2500+, where there are some other good options to consider.There are a *lot* similar-scale machines, at similar prices. Each have their fans.A few others that you might look at:– Taig CNC mill http://www.taigtools.com/cmill.html– The IMService router http://www.cadcamcadcam.com/122404sale.aspx (likely great for plastic, so-so for aluminum, no-good for steel)– Chinese routers, like the CNC 3020T. ~$800 w/ motors and controllers, looks pretty solid.– MAXNC-10 or MAXNC-15 millsAnother rule of thumb to consider: If it looks insubstantial enough that you could pick it up, it’s probably not a great choice for cutting metal.There is no difference between Arduino .pde and .ino files, except for those three letters. “.pde” was used by Arduino prior to version 1.0, and “.ino” has been used since. If you need to rename a file, just change those three letters.
Is this at about column 15 or 16? It is most likely due to a problem at U5. Check the pins carefully, and see if you can figure out where it isn’t making good contact.
Another thing that you might try (if you can) is to swap the chips at locations U4 and U5, to see if the chip itself is OK. If the problem moves when you do that, the chip probably needs to be replaced.
