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Andy Neil
02/11/09 02:45
Read: 1301 times
Basingstoke
Uk


 
#162273 - Basic electronics
Responding to: Dave Brooks's previous message
Dave Brooks said:
Here is a nice website that describes the differences between both types of transistors:

http://www.kpsec.freeuk.com/trancirc.htm

Not only that, it also tells you the basics of how transistors work, and how to use them - including connecting to an IC.

You would do well to study it thoroughly, and do some basic experiments with simple transistor circuits.

Once you have the basics of how transistors work, then you can move on to connecting them to microcontrollers...

Remember that the standard 8051 port output pin is basically Open-Drain - so it can sink current, but not source current.

Further details in the so-called "bible" for the 8051:

http://www.8052.com/faqs/120112



List of 64 messages in thread
TopicAuthorDate
Help Needed:8051 and BDX54C      Aamir Javaid      02/02/09 21:09      
   Draw it!      Andy Neil      02/03/09 00:37      
      How to post a schematic      Andy Neil      02/04/09 00:44      
   Reply to Aamir      Richard Ries      02/03/09 07:21      
      SPDT switch?      Andy Neil      02/03/09 07:39      
   the schematic      Aamir Javaid      02/05/09 00:41      
      ground that emitter      Erik Malund      02/05/09 05:46      
      PNP versus NPN      Dave Brooks      02/05/09 11:01      
         Basic electronics      Andy Neil      02/11/09 02:45      
      See if this helps...      Dave Brooks      02/05/09 11:22      
         the circuit to the left is always on      Erik Malund      02/05/09 11:31      
            woops...      Dave Brooks      02/05/09 11:57      
               so then      Aamir Javaid      02/05/09 22:41      
                  you have options...      Dave Brooks      02/05/09 23:17      
                  no answer till ...      Erik Malund      02/06/09 05:55      
            burning a hole...      Dave Brooks      02/05/09 23:22      
               Be cool!      Aamir Javaid      02/06/09 23:33      
                  gimme, gimme      Erik Malund      02/07/09 07:07      
                  proper current to LEDs.      Andy Neil      02/07/09 16:56      
   The only way to use the BDX54C...      Kai Klaas      02/07/09 08:36      
      LED current - sweeping generalisation      Andy Neil      02/11/09 02:36      
      Please explain      Aamir Javaid      02/11/09 22:14      
         Just imagine how this high LED current...      Kai Klaas      02/13/09 06:29      
            Hence the reason...      Andy Neil      02/13/09 06:46      
               I do not think so      Erik Malund      02/13/09 07:25      
                  His "please explain" thread proves...      Kai Klaas      02/13/09 07:47      
                     cant u?      Aamir Javaid      02/14/09 03:34      
                        You need to provide      Andy Neil      02/14/09 04:38      
                        Do you mean this?      Kai Klaas      02/14/09 07:42      
                           Thanks Sir KAi      Aamir Javaid      02/15/09 01:17      
                              10K SPI      Michael Karas      02/15/09 05:16      
                                 Meaning of "SIP"      Andy Neil      02/15/09 08:02      
                                    A 10K SIP Indeed !!!      Michael Karas      02/15/09 23:13      
                                       How it works??      Aamir Javaid      02/16/09 00:56      
                                          Short for what      Per Westermark      02/16/09 01:09      
                                          Look again - and think!      Andy Neil      02/16/09 11:16      
                                       so, what he has used?      Aamir Javaid      02/16/09 01:31      
                                          Why more schematics?      Per Westermark      02/16/09 02:00      
                                             But      Aamir Javaid      02/16/09 07:01      
                                                10k SIP do not connect anything. They add something!      Kai Klaas      02/16/09 13:19      
                                                   what for 8051      Aamir Javaid      02/17/09 09:34      
                                                      do you EVER bother to read the docs before asking questions      Erik Malund      02/17/09 09:39      
                                                         Back to basics      Andy Neil      02/17/09 11:28      
                                                      Yes, you will      Kai Klaas      02/17/09 12:10      
                                                RE: how those eight data lines are connected ?      Andy Neil      02/17/09 00:47      
                                             But      Aamir Javaid      02/16/09 07:01      
                                                as seen on the schematic      Erik Malund      02/16/09 08:42      
                                             Not all SIL resistor packs are the same!      Andy Neil      02/16/09 10:16      
                                                Yes, more than one type of SIL network      Per Westermark      02/16/09 11:34      
                              looks exactly like what I would suggest      Erik Malund      02/15/09 06:38      
                              Both, but take care...      Kai Klaas      02/15/09 07:59      
                                 what you think about this?      Aamir Javaid      02/15/09 23:31      
                                    Post link      Per Westermark      02/16/09 00:25      
                                       No no      Aamir Javaid      02/16/09 00:45      
                                          Doesn't add up      Per Westermark      02/16/09 02:06      
                                    Depends...      Kai Klaas      02/16/09 13:42      
                              it wont worked....      Aamir Javaid      02/16/09 07:21      
                                 Still Doesn't add up!      Andy Neil      02/16/09 07:31      
                                 Then you have done something wrong!      Kai Klaas      02/16/09 14:04      
                                    experimenting "wildly" ....      Erik Malund      02/16/09 15:01      
                                       Basic electronics      Andy Neil      02/17/09 00:44      
                                    You are right...      Aamir Javaid      02/17/09 09:29      
                  Actually      Aamir Javaid      02/15/09 23:17      
      Please explain      Aamir Javaid      02/11/09 22:18      

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