variable PWM LED

[ahmedragia21]

Hi, i wanna do a random PWM for an LED but using the cheapest thing maybe a pic16F48 , but i'd like to know other methods for not using a uC that can be used ?

 

[arunb]

a 555 can be used...google for 555 applications, there are many out there...

 

[ahmedragia21]

yea but how about the random duty cycle ?? can a 555 do that ?

 

[ahmedragia21]

I just wanna do a Random sequence for LED with Different duty cycles -_-

 

[Sceadwian]

You're not going to get random out of a 555, a micro controller can easily generate pseudo random numbers.

Linear feedback shift register - Wikipedia, the free encyclopedia

 

[ronsimpson]

PIC10Fxxx or PIC12Fxxx in the 6 pin package.

 

[solis365]

why random pwm? you just want it to flash with a random on/off time?

 

[ahmedragia21]

no , i just wanna make 3 two LEDs that light by random sequences and at the same time the intensity of it get changed

 

[blueroomelectronics]

Stick with a microcontroller.

 

[ronsimpson]

LEDs, True RGB LEDs, RGB Color Changing/Blinking LEDs, RGB Color Changing Light Bars. LEDs by the piece and LEDs in bulk form are in stock.
The K6 version of this LED cycles through 6 different colors. It needs 4 to 5 volts.