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Richard Erlacher
02/16/13 14:09
Read: 941 times
Denver, Co
USA


 
Msg Score: +1
 +1 Good Answer/Helpful
#189383 - Buy an oscilloscope
Responding to: Abhishek R. Kaushik's previous message
An oscilloscope allows you to observe changing voltages. It gives you important answers, ranging from, "Is this signal changing?" to, "What are the timing relationships between these signals?"

A multimeter allows you to know the relatively precise voltage at a given node in a circuit, but it seems to me that it's a lot more useful to know the relative state (high or low) of a signal when you're troubleshooting a microcontroller circuit. Of course the multimeter will help when you're working with ADC or DAC but unless they change very slowly, the multimeter won't really give you useful information.

Time after time we see situations on the 8052 or Chat forum that take many days to settle, when an oscilloscope would have resolved the question within minutes. You don't have to have a modern and costly instrument. Most problems can be solved with instruments available on eBay for about $200US or even less. You should have an instrument with bandwidth of at least 100 MHz, two or more channels, two timebases, in general, features comparable with those of, say, a Tektronix 465. Those PC-based instruments often suffer in precision or in bandwidth, and lack the delayed sweep. Keep in mind that the "bandwidth" of an analog 'scope is the frequency at which the signal is attenuated by 3db. If you don't know what that means, a little investigation on Google will help.

It's often possible to obtain an oscilloscope that will, in large part, take the place of, or include, a multimeter. One example would be a Tektronix 475A with DM44. I directed a friend who was considering a multimeter to one of these and he found it cost less than a good new multimeter would have cost, yet did much more to help him than a multimeter would or could have done.

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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