I need help for a project!!!

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hanya

New Member

• Jul 23, 2010

• #1

Hi...I need help for a project which I'm doing...I need to create a remote control...THe problem I'm facing is...I don't know how to turn off the PWM... The IC chip I'm using is AN1064.. I'm using the sony transmission so I'm suppose to send a bit 0 with a 50% duty cycle...but I'm really not sure how to...can anyone please help me?

 

mramos1

Active Member

• Jul 23, 2010

• #2

It is a low 50% then pulsed the other 50% to make a 0.

See figure 7 here. https://www.electro-tech-online.com/custompdfs/2010/07/01064A.pdf

 

H

hanya

New Member

• Jul 23, 2010

• #3

yeah...but I dont know how to write the programme....

 

mramos1

Active Member

• Jul 23, 2010

• #4

There were some samples in the app note.

You might want to look at a high level language to start out. MikroBASIC has a free version where you can write small programs. They have command to do the PWM and things. Also greatcow and a couple others. It will save you time. You have a PIC programmer?

 

H

hanya

New Member

• Jul 23, 2010

• #5

I'm currently using MPLAB to write the codes...I asked my lecturer and she said something like...turn of the pwm follwed by a delay for 0.6ms then turn on the pwm again followed by a delay for 0.6ms.... does it make sense? I tried that but I could'nt figure out how to turn off the pwm.

 

mramos1

Active Member

• Jul 23, 2010

• #6

Right, you want PWM off for 50% (.6ms I guess) and then on for 50% (.6ms) and that is a 0.