I'm thinking of making a DIY light fitting for an aquarium, using high power LED modules. Unsure of power of each, I've seen modules up to 150W used.... I'd probably go fo multiple modules at lower power each.
The plan is to be able to control them using a microcontroller PWM output. This is where I'm getting a bit confused.
I understand I could drive them via a suitable FET and a resistor, but would be very wasteful of power/heat, and I should look at a constant current source to drive them.
Can anyone give me a shove in the right direction as to what to do/search for - can I dim the LEDs with PWM from the ucontroller at the current source. Should I be looking at a commercial current source, or is this something I could build from a schematic/kit. This would run 10-12hr per day indoors, so reliability/efficiency are high priorities....
Thanks in advance....
Lee
The plan is to be able to control them using a microcontroller PWM output. This is where I'm getting a bit confused.
I understand I could drive them via a suitable FET and a resistor, but would be very wasteful of power/heat, and I should look at a constant current source to drive them.
Can anyone give me a shove in the right direction as to what to do/search for - can I dim the LEDs with PWM from the ucontroller at the current source. Should I be looking at a commercial current source, or is this something I could build from a schematic/kit. This would run 10-12hr per day indoors, so reliability/efficiency are high priorities....
Thanks in advance....
Lee