Shift register interfacing with pic micro controller

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varunme

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Anybody help me with a PIC micro shift register schematic ? ,
How can we make the PWM in the output from the shift register ?
I have to interface so many LEDs and sensors to my PIC , so I have to use a multiplexer and the intensity also to be controlled
 

how many LEDs? had a similar project proposal several years ago with 10000 LEDs
built a prototype with each LED color and intensity controlled by a PIC16 using PWM - data was shifted into the the PIC16s by a PIC32
 

what you exactly need please tell more
it will help others to answer in this threads
 

I want to make , PWM controlled light's prototype , which switch on and off after 6pm , when someone is there, it should glow at 100%, otherwise it should be 50%.

---------- Post added at 23:49 ---------- Previous post was at 23:47 ----------

want to interface 15 LEDs .
 

if all the LEDs are the same intensity you could use a single microcontroller using PWM with a drive circuit of the required power for the LEDs

what is the power of the LEDs?
 

But its like in a street light , if a person comes near it the LED glows its full bright , means i have to control each seperately
7W LEDs
 

How many PWM pins , the 16F877a have ?
 

the 16F877a has 2 PWM, see
PIC16F877A

some PIC16s have more, you can see the PIC16 family on
PIC16 MCU - Product Family - 8-bit Microcontrollers

click on the device link to see full details

in addition to using hardware PWM you can drive digital IO pins using a software PWM algorithm (as in the days before microcontrollers had hardware PWM)
 

can we get a single chip PWMs other than ucs ?
 

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