I have 9 common cathode RGB LEDs. I want to connect them in parallel and control R, G an B channels of all the LEDs. To do so I am planning to use 3 transistors. (So, LEDs won't be individually addressed)
Each channel of LED requires 20mA so for 9 of them I need 180mA.
At first I was planning to attach individual resistor for each LEDs' each channel. But that makes too much resistor (3*9 = 27). I tried to find a better solution but couldn't think of any way out.
Any better design suggestions on that ?
Thank you.
Each channel of LED requires 20mA so for 9 of them I need 180mA.
At first I was planning to attach individual resistor for each LEDs' each channel. But that makes too much resistor (3*9 = 27). I tried to find a better solution but couldn't think of any way out.
Any better design suggestions on that ?
Thank you.