| ??? 11/01/10 07:11 Modified: 11/01/10 08:25 Read: times |
#179406 - How did you test 'em? Responding to: ???'s previous message |
Charles Townsend said:
Out of the whole shipment How many was that? it overruns my serial port on the PC so bad that not even another working device will work. I had to reboot the PC a few times in order to straighten it out. A dodgy (or non-functional) MAX232 shouldn't have that effect - I think you (also) have other issues! Upon further investigation, I replaced the "max232" with a real one, and it worked every time. I did this for a few others and they also worked. Did you also probe a unit with a scope, to see what was actually happening at the pins? - were signal levels correct? - were the voltage multipliers working? - etc? Just swapping the chip is a bit crude; eg, the problem may just have been down to bad soldering... Probably worth doing a bit more rigorous testing first, but yes - they may well be able to investigate further... They were a good deal. No - they were quite evidently not a good deal! You mean they were cheap - which is not at all the same thing as "good value" ! See also: http://www.8052.com/forumchat/read/179383 I should have known it was too good to be true. Ah yes - hindsight is a wonderful thing! I heard of other guys being scammed for some atmel avr's You mean this: http://www.sparkfun.com/commerce/news.php?id=350 ? Also: http://www.sparkfun.com/commerce/news.php?id=364 Beware. It happened twice now to me, not a lot of money for me but still it hurts. Hmmm - sad, but true. :-( |
