>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)
|\>
|
|
---