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Hello, I am using 89c2051 ic for RGB dimming light . As there is no PWM pin on IC I wnat to know how can I genrate my PWM for dimming effect of LEDs.how canI use two times for generation of three pulses. I will be higly obliged for any suggestion
I need colour mixing of RGB lights . so rate would be 100HZ.maximum NOOO, it would be 120Hz MINIMUM or the most sensitive person will see flicker.
Actually i have no choice for my controller as I want to use available one with me i.e 89c2051 you are at a loss, without a PCA you will not be able to control 3 PWMs (RGB) concurrently for more than a very few LEDs.
and as I am comfirtable with C programming I want to program it in C. in C you will not be able to do it for more than a very few LEDs.
anyhow, the method is: for 1/2ms unblank the appropiate colors for 1ms unblank the appropiate colors for 2ms unblank the appropiate colors for 4ms unblank the appropiate colors
the above requires very fast code, for more than a few LEDs I have always had to resort to assembler
this gives you a resolution of 4 bits per color
How many LEDs do you want to contol.
Erik