i take new board....completely all new components...rechecked new 7809 regulator..no shorcuits.....ive used 14pin pad for new cd4093
all soldered and connected from original scheme...insted od BD653 used BD649 (pretty much same 90%)...
taken care of positive and negative voltage
all tests were run for 15-20 sec.
Board pluged in.....engine not workin'...even led too....
...on output close to 9 volts and raising ??? slowly to 10V ??? pot useless in this case no min or max same ouput voltage...
ok...then i've tried old BD651....same thing...but output voltage is 3v. on min and max too ?????
after that ive back bd649....tried again...10volts on output...lm7809 got some heat......all disconnected....
tried third time from lab power now....lab signaled shortcircuit....lm7809 is dead..taken out all pins on new one are shortcircuited.
definitely....ive do what i can...no thing has to be done...so concluison is that my scheme on split strip-board not working...something is wrong
ive trust BDA and of course you MPURSU...but in this project i have no luck...
thank you guys for help...specially MPURSU...