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46  Using Arduino / Project Guidance / Re: 3x5 led matrix on: August 22, 2013, 09:48:26 pm

dont know about the micro, but on most arduinos pin 1 is a serial pin so it might interfere with uploading, or give you a interesting light show while uploading
47  Development / Other Software Development / Re: why use Atmel Studio? on: August 22, 2013, 09:46:27 pm

but for instance just using arduino, going down and twiddling bits to toggle a pin gets you reaction speed of ~4us, using digital write its around 40us, 10x slower

at some point you are writing less arduino and more raw avr stuff, or you have a mcu that's perfect for your application but arduino does not support it

then you use atmel studio, I rarely use it, but knowing how to use it is nice
48  Development / Other Software Development / Re: why use Atmel Studio? on: August 22, 2013, 09:03:53 pm
speed of execution, and the ability to control any avr at its lowest form
49  General Category / General Discussion / Re: Suggestion: Reusing old computer as an Arduino station on: August 22, 2013, 08:29:15 am
well they do, just install xfce as your window manager
50  Community / Bar Sport / Re: virus/trojan malware usb transport. on: August 21, 2013, 11:38:01 pm
And those PLCs were usually plugged into computers running unpatched or pirated versions of Windows XP.  smiley-eek

I have dozens of PLC's under my control at work, none of them require attachment to a PC, and when they do its typically via a GPIO interface (ISA PCI USB whatever) sending single bits on single channels

not saying that machines dont use direct computer connections over some bus, but its typically a very simple bus, much like an arduino ... so unless your saving raw data from a plc, packing it up and running it as a windows exe, its not that big of a deal
51  Using Arduino / Programming Questions / Re: Faster shiftout() on: August 21, 2013, 11:33:39 pm


which uses the same thing as the lib
52  General Category / General Discussion / Re: Suggestion: Reusing old computer as an Arduino station on: August 21, 2013, 04:23:58 pm
yea if it will run a fairly recent version of java it will run arduino, when I started with arduino in ~2008 the machine I used for electronics stuff was a 800Mhz pentium 3 with 512 meg and windows XP

for the real linux nerds though, a few years ago I was out of work and a series of storms sequentially knocked out my computers, leaving the bench machine as a 1997 300Mhz powermac with 256 megs of ram and debian installed... It would not run java 1.6 or whatever so I used the arduino core libraries,  nano text editor and a make file all from the command line, once setup it was pretty easy, hit a F key in nano and have it run make - upload and bing bang boom
53  Using Arduino / General Electronics / Re: Have I fried one of my input pins? on: August 21, 2013, 12:11:28 am
pin one is the transmit pin of the avr chip, which eventually goes to your serial monitor

otherwords dont use pins 0 and 1 if you intend to use serial, and keep in mind stuff hooked up to them could monkey with uploading programs
54  Using Arduino / Project Guidance / Re: rs232 newbie question on: August 19, 2013, 10:04:33 pm
you dont really need the byte(0xfe) with serial write just Serial.write(0xFE);

serial read only reads 1 byte at a time, and you really should use Serial.available
55  Using Arduino / Project Guidance / Re: rs232 newbie question on: August 18, 2013, 12:06:45 am
a professional would buy some premade device to avoid any troubleshooting issues costing several hundered dollars, least I would

as far as ASCII, well ascii represents charters based on their hex value, so it should be easy enough to convert from ascii to hex, as far as what board you need, not many directly support RS232 anymore. Though you can can connect the RX and TX pins of an arduino though a converter (like a max232, the TI version costs less than a dollar)
56  Using Arduino / Programming Questions / Re: If(SoftwareSerial) ? on: August 17, 2013, 11:22:05 pm
you should use Serial.available to see if there is a byte in the buffer ready to read
57  Community / Bar Sport / Re: SOLVED:Anybody own the MPJA 9616PS / Circuit Specialists CSI3003SM power supply? on: August 17, 2013, 04:51:13 pm
and then you might be able to offset it using the trimpots on the control ocb
58  Topics / Robotics / Re: Tables instead of radians? on: August 16, 2013, 06:35:15 pm
what are you looking for ...

like radians to degrees is as simple as d = r*(180/pi)
59  Using Arduino / General Electronics / Re: How important is the resistor between arduino pin and npn transistor base? on: August 16, 2013, 12:09:48 am
without it, its more or less a direct short to ground

so its important
60  Community / Products and Services / Re: Cheap laser cut aluminum frame PCB stencil service on: August 15, 2013, 09:33:47 pm
I work with aluminum framed stainless steel stencils all the time, yes they are typically meant to be used in a machine (manual or automatic), they still will flop (not nearly as bad as film), and they are very difficult to align by hand.

They are however much more durable, and they do produce much cleaner results than any plastic film stencil I have ever used, if you are doing a production of more than a few individual PCB's
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