Spinac z bipolarneho tranzistora

Jan Waclawek konfera na efton.sk
Pátek Listopad 15 18:20:33 CET 2013


>zvìt¹ete proud do báze a nenechávejte ho saturovat

No, tak nakoniec som nechal tranzistor saturovat, ale som brutalne zvacsil
prud do bazy pri vypinani tou paralelnou diodou k bazovemu odporu (anodou
k baze) - to je to dostavanie tranzistora zo saturacie nasilim... :-)
Kupodivu to na to 1us nabeznu hranu stacilo. Nie to sice nic krasne, a
rozhodne by som to nepouzil do vyroby, ale na jednorazovy bazmeg odladeny
osciloskopom je to dost dobre... ;-)

Dole predkladam vysledok ctenemu obecenstvu, cim zaroven dakujem vsetkym za
pomoc a zelam prijemny vikend...

wek




                         2x1N4148          ___                      4xBCW66
                                       ---|___|---
                ___    ||        |\|  |    ___    |
MAX232/pin4 o--|___|---||----*---|
|--*---|___|---*----------*---------------*----o VPP
(C+ 0..8V)      220R   ||    |   |/|  |    2x1k   |          |             
 |
  ~40kHz              100nF  |        |           -          |             
 |
                             |      -----        | | 68k     |             
 |
                      |\|    |      -----        | |         |             
 |
MAX232/pin2 o---------| |----*        |  1u       -          |             
 |
(V++  8V)             |/|             |           |          |             
 |
                                     ---      ----*          |             
 |
                                             |    |          |             
 |
                                             |    _          |             
 |
                                 fit jumper  o   | | 39k     |             
 |
                                  for 8V     o   | |         |   TL431     
 |
                                open for 12V |    -        ,---'           
 |
                                             |    |          ^             
 |
                                              ----*---------/ \          
---*
                                                  |         ---          | 
 |
                                                  -          |           | 
 |
                                                 | | 27k     |           - 
 |
                                                 | |        ---         | |
 |  22k
                                                  -                     | |
 |
                   +5V                            |                      - 
 |
                    o                            ---                     | 
 |
                    |                                                    | 
 |
                    -                                                    |
|/
                   | |47k         -----------------------*---------------*-|
                   | |           |                       |                
|\>
                    -   47k      |                       |                 
  |   +5V
                    |   ___    |/                        |                 
  |    o
ATMega8/pin13  o----*--|___|-*-|                         |                 
  |    |
(/VPP)              |        | |\>                       |                 
  |    -
must go up          |  |/|   |    |                      |                 
  |   | |
6-7us after RST      --| |---     |               -------                  
  |   | |
                       |\|       ---             |                         
  |    -
                        1N4148           47k     |                         
  |    |      MCLR/VPP
                   +5V                   ___   |/                          
  *----*----> DIP8/pin4
                    o            -------|___|--|                           
  |
                    |           |              |\>                         
  |
                    -           |                 |                        
  |
                   | | 47k      |                 |                        
  |
                   | |          |                ---                       
  |
                    -           |                                     47k  
  |
                    |           |                                     ___  
|/
ATMega8/pin32 
o----*-----------*------------------------------------|___|--|
(RST)                                                                      
|\>
                                                                           
   |
                                                                           
   |
                                                                           
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