Advice needed on RTC/Arduino 3W LED timer/dimmer project

Projects General Guidance
1

Hi guys, sorry about the ambiguous subject, but didnt have a concise way of explaining my needs in one sentence.

What I need is some guidance on planning a project, the project being;

A 3watt (750mA) LED that comes on at a set time of day, stays on for a period of time, then slowly fades off. This should happen on daily basis.

Ive ordered a DS3231 RTC module, I assume that would be the sensible/only way to approach the timing issue. What I'm really puzzling over is how to fade a 3w LED when it's being driven with a constant current source...how would that work?

I would like to keep the cost down as much as possible, so, if anyone could put simply the methods I should employ to achieve my goal, I would be very thankful. ie.

RTC-Arduino-thisSolutionToDimLED-profit

Thank you all for your time 8)

2

You can get LED driver that have PMW pin for the fade like this

3

Ooo ok. I assume you send a PWM signal(analogWrite) from the arduino to the PWM pin on the driver? 0 for off, 255 for full brightness?

Thanks for the swift reply :slight_smile: