Mac 67 Posted July 10, 2011 Share Posted July 10, 2011 Looks awesome! Bravo! Are these the ten for $10 50x50mm boards from Seeed (about $13 including shipping) ? Quote Link to post Share on other sites
SugarAddict 227 Posted July 10, 2011 Author Share Posted July 10, 2011 ok... tried flashing the calibrations and that chip seems to be hosed now Should I not break the xin/xout pins out? Would that be the culprit for bad interaction with the xtal? Looks awesome! Bravo! Are these the ten for $10 50x50mm boards from Seeed (about $13 including shipping) ? Yes! Quote Link to post Share on other sites
Mac 67 Posted July 10, 2011 Share Posted July 10, 2011 ok... tried flashing the calibrations and that chip seems to be hosed now Wait a minute. The '2553 already has factory calibration values in flash for 1, 8, 12, and 16 MHz. Why did you try to flash new values? Quote Link to post Share on other sites
SugarAddict 227 Posted July 10, 2011 Author Share Posted July 10, 2011 ok... tried flashing the calibrations and that chip seems to be hosed now Wait a minute. The '2553 already has factory calibration values in flash for 1, 8, 12, and 16 MHz. Why did you try to flash new values? I recalibrate all the chips I get. Quote Link to post Share on other sites
SugarAddict 227 Posted July 11, 2011 Author Share Posted July 11, 2011 Yes, I should not have broken out the xin/xout... After testing it with both of the boards I'm using I've figured that scraping and removing a peice (next to the pin) of the traces for those two will fix the problem... oh well. There was one lucky design bonus. Jack fits perfectly with LP mounted on top. Which makes the breakout going downard fit in a single breadboard row instead of crossing over and spanning two of them. (Just gotta remember to not power both on accident this way, lol) And if you didn't notice the boards have 90 jsolarski 1 Quote Link to post Share on other sites
djlorenz 1 Posted July 13, 2011 Share Posted July 13, 2011 they are nice... but... why you added an external power? why didn't you use the launchpad's power? Quote Link to post Share on other sites
RobG 1,892 Posted July 19, 2011 Share Posted July 19, 2011 Go the board, looks awesome, thanks SA! they are nice... but... why you added an external power? why didn't you use the launchpad's power? so you don't have to rely on LP/USB for power and use it as a stand alone device Quote Link to post Share on other sites
ERTW 6 Posted July 20, 2011 Share Posted July 20, 2011 The etchant gets under the sharp corners easier and causes bad etching. I thought it was for an electric-related issue. maybe electrons don't know how to turn sharp corners... Here it is an explanation I've found(it comes from TI)" Just to elaborate on this... I recently finished designing my first PCB from the ground up at my internship and encountered the right angle trace problem. After talking to my PCB manufacturer I found that the main reason that right angle traces are not used is that they start to resemble antennas. They aren't very good antennas (Better than 45 degree angle traces) but they are antennas. They start to radiate badly with fast rise time pulses (Independant of frequency). This leads to leaking radiation to the surrounding environment and to other traces. Since antennas receive just as well as they radiate it also adds to the noise susceptibility of its own trace. Quote Link to post Share on other sites
SugarAddict 227 Posted July 21, 2011 Author Share Posted July 21, 2011 So a maze-like board with many pointless right angles could potentially be used for signal jamming? Quote Link to post Share on other sites
geoper2 0 Posted July 21, 2011 Share Posted July 21, 2011 Wow really nice it looks good, how do you solder the smt components, by hand or you use oven? Quote Link to post Share on other sites
gordon 229 Posted July 21, 2011 Share Posted July 21, 2011 If I can solder SMD down to 0603 without too much trouble with minimal magnification (I've been living on caffeine for 15 years which is wonderful for fine motoric functions matched with a not exactly first-class vision), everyone can! Obligatory link: Dave doing a SMT soldering tutorial (watch the other parts, too). Quote Link to post Share on other sites
nobody 47 Posted July 21, 2011 Share Posted July 21, 2011 Nice tutorials is also here. Quote Link to post Share on other sites
zeke 693 Posted July 21, 2011 Share Posted July 21, 2011 This may be way off topic but I used to do 0603's with no assistance but now that I've got my Leica MS5 microscope I can do 0402's without difficulty. Here's my eye's best friend: Quote Link to post Share on other sites
ERTW 6 Posted July 21, 2011 Share Posted July 21, 2011 So a maze-like board with many pointless right angles could potentially be used for signal jamming? Essentially yes, a jammer is basically an antenna that radiates at the same frequency band as the device it is trying to disrupt thus lowering the signal-to-noise ratio. Quote Link to post Share on other sites
SugarAddict 227 Posted July 22, 2011 Author Share Posted July 22, 2011 I solder 0402, 0603, 0805, 1206, tssop... and soon will be doing some QFN, all by hand with only an iron and tweezers, both have pointy tips. If I can do it, anyone can do it... Quote Link to post Share on other sites
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