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buck boost chopper
hi all,
now i would like to build a buck-boost chopper which have variable output.
after i done my connection as shown in the figure, i found that 0V at my output..
no matter how i adjust the frequency fed in, the output is still 0V.
then i go to do some researches, i...
hi~cyr
yah...like u said...
i should write with that only...
no need to check 1 by 1...
thus, i didn't set my portb as input also...all my setting is wrong...
i corrected it already and everything works fine...
thanks a lot!!
hello all,
i'm new in microcontroller...
Recently,i would like to do a project regarding the used of PIC16F877.
So,i test my PIC's i/o first..all the output pins of my PIC can work well.(i test with led blinking program..
but when i test the input pins of porta and portb with the program at the...
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