Timeline for Simple transistor switching example should show LED off
Current License: CC BY-SA 3.0
19 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 11, 2013 at 15:08 | history | edited | Anindo Ghosh | CC BY-SA 3.0 |
deleted 1 characters in body
|
| Jul 11, 2013 at 14:51 | answer | added | Jose Martins | timeline score: 0 | |
| Oct 17, 2012 at 18:04 | comment | added | Kortuk | @RussellMcMahon the book link you have made is a shortened link and is linking to a book above its view limit, can you give more details on the book? | |
| Dec 15, 2011 at 19:56 | comment | added | Russell McMahon♦ | See updated answer. If you had provided the circuit diagram the problem would have been immediately clear. The apparent circuit was so arcane that I did not believe it was intended, but it was. Just reverse the transistor and hey presto. NB - I cannot see any good reason for using this circuit. Their may be one. I await enlightenment. | |
| Dec 15, 2011 at 19:41 | comment | added | Russell McMahon♦ | Update: Here is the book concerned . (1) The transistor is revered. Turn it around 180 degrees and their circuit is as they intended. Their basic data shows the transistor wrongly. (2) ANd/but - the circuit is an emittee follower as it was obvious it would be if you "just" reversed the transistor. This is such an 'interesting' way to do things that it was hard to believe that it was intended. It was. | |
| Dec 14, 2011 at 20:56 | comment | added | Kamil Sindi | Personally I'm not deterred at all. This was a great learning experience. I'm sure I'll have a lot more frustrations from manufacturers along the way... :-). | |
| Dec 14, 2011 at 17:06 | comment | added | darron | Wow. Having an introductory book like that showing incorrect information is really bad. Curious but otherwise "unhooked" people could get frustrated and give up, never to come back. | |
| Dec 14, 2011 at 13:48 | comment | added | Kamil Sindi | Great! Will do! | |
| Dec 14, 2011 at 8:24 | history | tweeted | twitter.com/#!/StackElectronix/status/146868108932550656 | ||
| Dec 14, 2011 at 6:50 | comment | added | Russell McMahon♦ | I emailed them and said their book was broken. They auto-replied their receit. Stay tuned ... . . [I didn't mention who you were or circumstances] | |
| Dec 14, 2011 at 4:45 | vote | accept | Kamil Sindi | ||
| Dec 14, 2011 at 4:44 | history | edited | Kamil Sindi | CC BY-SA 3.0 |
added 20 characters in body
|
| Dec 14, 2011 at 4:36 | comment | added | Russell McMahon♦ | I checkd 2N2222 data sheets from several manufacturers. ALL I found including metal can ones show transistor is CBE readingUP the breadboard as shown. (terminals 48-49-50) SO there is NO DOUBT that they have the circuit VERY WRONG as shown. Their C (terminal 48( goes via R3 to B- (ground). For an NPN transistor it should be B+ / +12v. etc. Build the circuit as I have suggested. It will work ;-). Transistor MAY be dead. | |
| Dec 14, 2011 at 4:33 | history | edited | Kamil Sindi | CC BY-SA 3.0 |
added 113 characters in body
|
| Dec 14, 2011 at 4:22 | history | edited | Kamil Sindi | CC BY-SA 3.0 |
added 319 characters in body
|
| Dec 14, 2011 at 3:47 | history | edited | Kamil Sindi | CC BY-SA 3.0 |
added 8 characters in body
|
| Dec 14, 2011 at 3:22 | history | edited | Kamil Sindi | CC BY-SA 3.0 |
deleted 14 characters in body
|
| Dec 14, 2011 at 3:21 | answer | added | Russell McMahon♦ | timeline score: 15 | |
| Dec 14, 2011 at 3:13 | history | asked | Kamil Sindi | CC BY-SA 3.0 |