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Richard Erlacher
02/21/13 10:04
Modified:
  02/21/13 10:06

Read: 902 times
Denver, Co
USA


 
#189440 - Take a close look at the devboard
Responding to: Abhishek R. Kaushik's previous message
DO you really want to try to replace the MCU if it's "blown"? How, without an oscilloscope, can you figure out which component it is that's "blown"? I have to agree with Erik ... if you have only one board, and no oscilloscope, you'll never know what's wrong. You'll always wonder if that last "foolish" thing you tried did some damage.

I'd suggest that you reconsider what I previously mentioned, and acquire a used TEK 475A with DM44 which provides you with the oscilloscope and multimeter, and even a thermal probe if you need it, and then proceed.

I'd suggest you might want to try a non-Atmel MCU for which the serial-port programmer circuit is well defined, e.g. one of the MAXIM/Dallas DS89C4x0's, of which you can probably get a free sample or two just for the asking, or a NXP or or other series not as widely divergent from a programming standard as the ATMEL series. Once you get established, you can deal with supply chain issues. It's seemingly foolish to buy things in India, as they're usually vastly overpriced and supply issues frequently arise, as the vendors don't know what they're selling.

To get started, I'd recommend you stay away from parts in other-thanDIL-40 packaging, as the surplus market still contains many of them, though they're not popular for production any longer. If, for some reason, you can't find such a thing anywhere, even online, then email me and I'll send you a couple, perhaps even including an old standard 8751. With those you can do anything that's documented in their datasheet, can program them in ASM, or in 'C' if you prefer and have the tools, and can rely on the datasheet. That's not always possible with ATMEL.

RE


List of 70 messages in thread
TopicAuthorDate
Your suggestions on starting things with MCUs (8-bit or 32)      Abhishek R. Kaushik      02/10/13 08:24      
   what experience do you have?      Erik Malund      02/10/13 11:31      
      Starter in electronics, good with programming.      Abhishek R. Kaushik      02/10/13 22:51      
   There's more to consider      Richard Erlacher      02/10/13 11:39      
      helpful.      Abhishek R. Kaushik      02/10/13 22:52      
   You do realise that 8-bit != 8051 and 32-bit != ARM?      Andy Neil      02/11/13 06:17      
      yes I understand.      Abhishek R. Kaushik      02/11/13 21:41      
         I think these are the great starting points      Andy Neil      02/12/13 00:47      
         Technical or semantics      Raghunathan      02/12/13 08:50      
            Thanks for understanding and directions      Abhishek R. Kaushik      02/13/13 05:06      
               All required books havee been mentioned      Raghunathan      02/13/13 08:45      
               Also buy a multimeter and soldering equipment      Kalpak Dabir      02/16/13 01:02      
                  What would be the point of buying a photocopy?!      Andy Neil      02/16/13 04:30      
                  what more should I buy?      Abhishek R. Kaushik      02/16/13 10:17      
                     would be buying a serial2usb converter to work with laptop      Abhishek R. Kaushik      02/16/13 10:21      
                        serial - USB      Erik Malund      02/16/13 20:07      
                     Buy an oscilloscope        Richard Erlacher      02/16/13 14:09      
                     Bench PSU      Oliver Sedlacek      02/18/13 02:37      
                        I've built my own PSU many times       Richard Erlacher      02/20/13 10:15      
                           there is no need for a PSU      Erik Malund      02/20/13 10:26      
                              That's very true, and it's convenient, too ...      Richard Erlacher      02/20/13 10:52      
   not at the same time      Erik Malund      02/11/13 07:40      
      Yep, shall be starting with 8-bit      Abhishek R. Kaushik      02/11/13 21:35      
         you must, to work with the '51 have a copy of 'the bible'      Erik Malund      02/12/13 07:20      
            adding some more        Jim Granville      02/12/13 20:28      
               And more...      Andy Neil      02/12/13 23:45      
            good info      Abhishek R. Kaushik      02/13/13 05:53      
               My reason for recommending a f12x kit      Erik Malund      02/14/13 10:21      
                  Can work for different MCUs too?      Abhishek R. Kaushik      02/16/13 10:06      
                     SILabs only      Erik Malund      02/17/13 06:51      
                        I'm not so sure that $1000US will cover it      Richard Erlacher      02/17/13 10:03      
                        very valuable, how about compatibility with breadboards?      Abhishek R. Kaushik      02/17/13 21:59      
                           [ed] "Breadboards" ?      Andy Neil      02/17/13 23:54      
                              RE: 0.1"-pitch DIL Package (DIP)      Andy Neil      02/18/13 00:52      
                              emphasizing two points      Erik Malund      02/18/13 06:51      
                                 RE: Breadboards       Andy Neil      02/18/13 07:41      
                           SiLabs toolsticks too..      Jim Granville      02/18/13 02:07      
                              RE: SiLabs toolsticks       Andy Neil      02/18/13 02:28      
                           stay away from beadboards      Erik Malund      02/18/13 06:48      
                              Breadboards have their place      Andy Neil      02/18/13 07:40      
                                 breadboards      Mahmood Elnasser      02/18/13 13:39      
                                    I have another RS232 solution ... and it's cheap      Richard Erlacher      02/20/13 10:59      
                                       even better      Mahmood Elnasser      02/21/13 01:37      
                                          I don't think this will help at all ...       Richard Erlacher      02/21/13 10:12      
                                             Modern PCs      Mahmood Elnasser      02/21/13 13:23      
                                                Sad, but true.       Richard Erlacher      02/22/13 06:58      
                                             It does not look like USB      Jim Granville      02/21/13 15:08      
                              Choosing Silabs      Abhishek R. Kaushik      02/19/13 04:06      
                                 what is your budget?      Erik Malund      02/19/13 07:08      
                                    my budget is of $250 including shipping      Abhishek R. Kaushik      02/19/13 09:11      
                                       Would buy from digikey or mouser      Abhishek R. Kaushik      02/19/13 09:14      
                                          at that budget ...      Erik Malund      02/19/13 13:02      
                                             probability of getting blown?      Abhishek R. Kaushik      02/21/13 02:47      
                                                Murphys law        Erik Malund      02/21/13 06:39      
                                                Take a close look at the devboard      Richard Erlacher      02/21/13 10:04      
                                       Mouser/Digikey      Jim Granville      02/19/13 14:37      
                                          if you stick with SILabs      Erik Malund      02/19/13 19:38      
                                             only parttially true      Jim Granville      02/19/13 21:18      
                                                if you use a chip with USB      Erik Malund      02/20/13 06:06      
                                                   But...        Andy Neil      02/20/13 06:46      
                                                      yes, if      Erik Malund      02/20/13 09:42      
                                                         I would recommend that it should be!      Andy Neil      02/20/13 10:23      
                                                            don't know what will I do..But I have a right to do mistakes      Abhishek R. Kaushik      02/20/13 21:45      
                                                               Not having been an ATMEL user ...      Richard Erlacher      02/21/13 00:13      
                                                                  NXP P89V664 based devkit good to start with?      Abhishek R. Kaushik      02/25/13 04:10      
                                                                     P89V664 based devkit       Jim Granville      02/25/13 13:27      
                                 It's good to heed Erik's warning ...       Richard Erlacher      02/20/13 11:05      
                                    just notes      Erik Malund      02/20/13 12:22      
                                       Once again ... Erik's right ... however ...      Richard Erlacher      02/20/13 16:11      
         Skills more important than specific architectures      Andy Neil      02/12/13 07:30      

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