pic16f84 Timer0 problem
- Thread starter emrahmrcn
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bimbla
Advanced Member level 1
timer0 pic16f84
You mean the o/p voltage does not stabilize? Does it change with load?
If this is the case then check if you have a closed loop circuit which will regulate the o/p voltage.
bimbla.
You mean the o/p voltage does not stabilize? Does it change with load?
If this is the case then check if you have a closed loop circuit which will regulate the o/p voltage.
bimbla.
mosh
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rc filters pic16f
Hi emrahmrcn,
there is some possible problems I can guss:
1.wich kind of oscillator do you use?
[some oscillator sircuits have a low ferq. oscillation (much more lowe freq. than osc. main ferq. & other than usual harmonies)]
2.is your code balance?
[your loops should be exactly same for each cycle,even a line less or more for
each cycle will make the things wrong.]
about heat...
your mosfets looks good [they are IRFZ44 isn't it].
is your transformer match to your ferq. , it seems you use 50Hz on pic,is your transformer made for 50Hz,or vice versa.
also yor pulses should be fast and short .
hope helped
mosh
Hi emrahmrcn,
there is some possible problems I can guss:
1.wich kind of oscillator do you use?
[some oscillator sircuits have a low ferq. oscillation (much more lowe freq. than osc. main ferq. & other than usual harmonies)]
2.is your code balance?
[your loops should be exactly same for each cycle,even a line less or more for
each cycle will make the things wrong.]
about heat...
your mosfets looks good [they are IRFZ44 isn't it].
is your transformer match to your ferq. , it seems you use 50Hz on pic,is your transformer made for 50Hz,or vice versa.
also yor pulses should be fast and short .
hope helped
mosh
emrahmrcn
Newbie level 6
pic16f84 not working
The pic codes is here;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
MainLoop
bcf PORTB,PHASE1
call WaitForTmr ; Wait for 200Hz
bsf PORTB,PHASE1
call WaitForTmr
bcf PORTB,PHASE2
call WaitForTmr
bsf PORTB,PHASE2
call WaitForTmr
goto MainLoop
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
Mosfets are IRFZ44
Transformer 9-0-9 Primary_240VAC Secondary_50Hz
The pic codes is here;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
MainLoop
bcf PORTB,PHASE1
call WaitForTmr ; Wait for 200Hz
bsf PORTB,PHASE1
call WaitForTmr
bcf PORTB,PHASE2
call WaitForTmr
bsf PORTB,PHASE2
call WaitForTmr
goto MainLoop
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
Mosfets are IRFZ44
Transformer 9-0-9 Primary_240VAC Secondary_50Hz
mosh
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pic16f84 timer0 beispiel
ouch!!!
I'm not familiar with your code language [I'm trying to improve but for now I just know PICbasic] (((( IS THERE anyone can help and check the code?)))))
just some advice about circuit:
1.you should use a RC filter on AC [output] side to reduce the noise and make
AC voltage more stable.
2.with 9V transformer you should get something around 280-300V on AC side
specialy without a load and also I guss that going hot under load.
And finaly if your load going to change each time,you're going to need a kind of
regulator for stabilize the output voltage.
they are detailed information,without all of these your circuit will work, so build it
and have fun!
mosh
ouch!!!
I'm not familiar with your code language [I'm trying to improve but for now I just know PICbasic] (((( IS THERE anyone can help and check the code?)))))
just some advice about circuit:
1.you should use a RC filter on AC [output] side to reduce the noise and make
AC voltage more stable.
2.with 9V transformer you should get something around 280-300V on AC side
specialy without a load and also I guss that going hot under load.
And finaly if your load going to change each time,you're going to need a kind of
regulator for stabilize the output voltage.
they are detailed information,without all of these your circuit will work, so build it
and have fun!
mosh
bimbla
Advanced Member level 1
pic16f84 + mosfet
Your circuit is open loop. Use negetive feedback. This will give you regulated o/p.
Your complementary uC o/p should have 'dead zone' to avoid common mode conduction of both the o/p devices. This will reduce heat and increase reliability.
bimbla.
Your circuit is open loop. Use negetive feedback. This will give you regulated o/p.
Your complementary uC o/p should have 'dead zone' to avoid common mode conduction of both the o/p devices. This will reduce heat and increase reliability.
bimbla.
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