If I'm here today, it's because I need some help for something that is, I think, easy for you. I am quite a newbie in EE but I am trying to improve myself :).
Here is the thing, I'll try to be as clear as possible with what I am dealing with. I am trying to figure out how I could create some level of brightness for some LEDs connected to an Arduino knowing that I can't use PWM.
I have three LEDs and I would like to have 3 levels of brightness for them. The LED I have are 3.02V / 15mA. So if I am not wrong, with a 3.3V power supply, I need a 20 Ohm resistor to bright one of them fully. With a MOSFET properly chosen, I will be able to drive it, am I right ? If so, with the above schematic, will I be able to have my 3 levels of brightness ? Since for each MOSFET, I have a different resistor value.
Are there others ways to achieve what I am trying to do without PWM ?
Thank you in advance for your answers !
(sorry if my English is not perfect)