PWM minimal 3 components

GB
PWM minimal with 3 components pic12F675, 1 resistor, 1 LED.

I put source code here;
http://pagesperso-orange.fr/pat.deaubonne/DOWNLOAD/pwm.zip

Compiled by my Compiler; (in French)
http://pagesperso-orange.fr/pat.deaubonne/pic/freepicbasic/index.htm


FR
MLI (PWM) version minimum avec 3 composants pic12F675, 1 résistance, 1 LED.

freepicbasic@hotmail.com
Search "freepicbasic" on Youtube ;-)
:1000000005280000000000005A288316EF30850004
:1000100083128316FF23900083120001AC0032305C
:10002000AA00AE01AD0105153230A0000000A00B02
:10003000162800000000AD0A2D082A02031D13280F
:1000400005113230A0000000A00B232800000000A2
:10005000AD0A64302D0203182E282028AE0A033082
:10006000A0002E082002031D122805080239AB004B
:1000700000302C02031D422800302B02031D4128B2
:10008000AA0A472800302B02031D4728AA03013083
:100090002A02031D4F280001AC000230AA00643080
:1000A0002A02031C57280130AC006230AA00112834
:0600B000630005280900B1
:02400E0084012B
:00000001FF

Category:

Entertainment

Tags:

• PWM
• pic12F675
• LED
• minimum
• freepicbasic

[freepicbasic]

FR j'ai ajouté le Hex sur l'info général

GB I add the hex file in the main infos

click (plus d'infos) (more infos)

[alzeena27]

can anyone tel me an exact way to produce the PWM pulses?? i found dfficulty by using acomparator

[freepicbasic]

You have to change a squarred wave signal .

And keep the fixed frequency , and in the same time to change the rapport of the two periods On/Off

The sum of the two periods will stay the same for to have a fixed period.

For make a PWM with analogical chips, you need first an sawtooth signal.

second a comparator for to choose the fall front.

[freepicbasic]

You need 2 x NE555 for to make this effect !

And 3 components more for one ne555 , and a RC for to make a slope that do a progressive ligthning with modulation on pin 5-control voltage).

It possible you need trimmers too for adjust the right effect that you want.

[AdolfOliverBush4]

No source code necessary just a battery supply (3 to 9 vdc) depending what style of 555 ic you are using, there are different ones for different voltages. Enjoy!

[freepicbasic]

Ok , it less expansive and need no program.

But, there are more components and it is a definive application, the pic can be re- programmed.

It is just a simply funny example for the pic.

note:

The resistor can be shunted too, and so...

You ll have just, a 2 components PWM.

[marc1979Guitare]

Ya t il un schema svp? :)

merci! :)

[imarzouka]

Where can I get the source code for this?