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241  Using Arduino / Project Guidance / TL494 - Plasma Speaker on: September 03, 2011, 08:43:34 pm
Ok so i came across these fascinating plasma speakers all over the internet and the one i want to replicate uses a TL494 to
Quote
"generate a high frequency (5KHz to 45KHz) to drive the flyback transformer to make high voltage arcs. Then when you give it audio, the TL494 modulates the audio frequency into the main high frequency"
now can this replicated with an arduino with out the use of that specific IC?  because with a uC's ability to be programmed a lot more fun can come out of it, being that i do not fry my self of course

I am hoping i wouldnt have to get down and dirty in to the registers though eventually i will have to venture down there.. or i could just use the IC along with  the duino
242  Using Arduino / Project Guidance / Re: Some advice? on: September 01, 2011, 09:41:52 am
i wish i had 26 hour days

http://arduino.cc/blog/2010/04/26/putting-an-arduino-diecimila-to-sleep-waking-up-2-part-tutorial/

or look into the famous watchdog timer  in the chip
243  Using Arduino / Project Guidance / Re: PWM and how it affects time sensitive functions on: September 01, 2011, 12:53:37 am
i see, then perhaps it must be that something was adding noise, because what i was PWMing had some very long leads about 3 feet of wire so it must just picked up all sorts of things but still the eratic reading where on the IR side not the pwm side..either way ill have to recreate the circuit to give a proper discription..and i was reading your tutorials today mr grumpy and it was all very insightful perhaps you should it would e nice to read some more

The decoupling article i found was a very much needed read for me
244  Using Arduino / Project Guidance / PWM and how it affects time sensitive functions on: August 31, 2011, 11:58:19 pm
while running some tests i find that if im PWMing while trying to get time sensitive inputs i get different values then if i was not PWMing: example
i was trying to get some IR codes from a remote with an IR detector and i ogt the codes i needed and once i started to modulate something while still listening for a specific code i would get a different reading from the same button being pressed on the remote.. so im assuming since a "processor" can only do one thing at a time the second i start to pwm it throws my Ir reading slightly off..
not posting any code since i think this maybe whats going on and i closed it al up anyways it was just a little test i was doing but am i correct in my reasoning?
245  Development / Other Hardware Development / Re: myDuino (my first PCB) on: August 31, 2011, 08:04:05 pm
nice, i recommend iteadstudio.com if you want to get your pcb's made they offer 5cm x 5cm 10pcbs for 9.99 , they also have options for color mask, such as white blue black etc... or if its single sided and your etching at home then photo resist is the way to go
246  Development / Other Hardware Development / Re: myDuino (my first PCB) on: August 31, 2011, 10:23:46 am
is it me or are you missing a capacitor from the 7805s  common gnd and its output? i just looked at the picture i do not have eagle to look at the board file
247  Using Arduino / General Electronics / Re: PCB export to gerber question. on: August 30, 2011, 01:08:52 pm
thats why i said i was " thinking " of investing on a laser printer, i have yet to do so
248  Using Arduino / General Electronics / Re: PCB export to gerber question. on: August 30, 2011, 01:02:52 pm
yeah i was thinking of investing in a laser printer , but transparency copies at my local staples are  99c  I dont make that many either , if i could find double sided photoresist boards that would be stellar!!!!!! ??
249  Using Arduino / General Electronics / Re: PCB export to gerber question. on: August 30, 2011, 12:14:47 pm
ive done photo resist, well thats all ive done, i didnt mirror anything though, since its printed on a transparency you just flip that, so in essence you ARE mirroring.
250  Using Arduino / General Electronics / PCB export to gerber question. on: August 30, 2011, 05:37:25 am
Im not sure if this is out of bounds as far as general electronics goes, but my question is as follows,
 i am using sprint-layout to design a circuit which will later be produced on a pcb, however when exporting the design to gerber file it gives options to mirror a layer, as a matter a fact it pre selects mirror for the top lay of copper which makes me think that is how it SHOULD be , should i mirror it? because when i do  then obviously everything is wayyy off, as far as i understand when i am designing a board on most if not all layout designers , it is as if you are looking at the board from the top side and the board is transparent so you can see the bottom copper traces....am i right? if this is the case then mirroring any layers would be a bad move... if so why would they even put it as an option. just to mess with my head ? or maybe i am wrong.... any insight? when opening the gerber files with any gerber viewer they are all wrong because of the mirroring..which further leads me to belive no mirroring... correcto mundo?
251  Using Arduino / Project Guidance / Re: Bare minimum for arduino powered projects on: August 30, 2011, 04:35:21 am
yup, the components keep getting less and less, they might as well make the whole chip self sufficient needing nothing but a power supply
252  Using Arduino / Project Guidance / Re: Bare minimum for arduino powered projects on: August 30, 2011, 01:14:16 am
ive made some rather bare boards and all i have on them is the 328, a crystal, 2 capacitors for the crystal , 2 capacitors to smooth out my power supply, and female headers for what ever pins i am going to be using. oh and a voltage regulator   thats about  $1  in parts , and a $5  bootloaded chip. But for the sake of future projects i bought everything i needed to bootload the chips to save about 2 bucks and get the 328s cheaper , bare  boards i found so much fun , but if you get bored like i do too , i bet sooner or later your going to be wanting to build a monster of a board.

Not the prettiest thing but it does the job ;

253  Using Arduino / General Electronics / Re: Would this be a good smd regulator for a clone. on: August 27, 2011, 04:39:48 pm
alright thanks for the feed back guys , i think ill stick with the 1117 mostly because of my aplications i will fine with the dropout voltages
254  Using Arduino / General Electronics / Would this be a good smd regulator for a clone. on: August 27, 2011, 03:37:02 am
i was thinking of using this smd regulator for a clone, just want to make sure if it would be ideal for the job, perhaps not ideal but good enough..
http://www.picstuff.com/index.php?route=product/product&product_id=53

datasheet
http://www.picstuff.com/datasheets/LD1117S50CTR.pdf
255  Using Arduino / Project Guidance / Re: Circuit simulation software on: August 26, 2011, 07:59:02 am
sprint layout is easy to use and looks nice aswell 57 bucks not bad compared to wizards $100 plus
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