I want to make a dimmable LED fixture for my new paludarium. I want to use this programmable dim controller because it is cheap and does everything I want:
1. Name: Programmable led time controller
2. Operating temperature: -20 to 60 degree
3. Supply voltage: DC12-24V
4. Output: 5 channels
5. Output: Five CMOS drain-open output
6. Control variant: common anode
7. Max load current: 4A each color
This is the only connection schema I could find:
First of all, I guess it dims LEDs by using PWM, am I right?
On the back I want to use Cree high power LEDs in serie (+/- 24V, max 700mA per serie). But I already read it is not as easy as just attaching a string of LEDs. So I found the LM317. Very easy to hook up, but not dimmable. Than I found people using the CAT4101 for dimmable setups. Can I use this? And can someone help me how to use it?
Second, can I use a regular 24V power supply before the controller or do I need a LED driver? And if I need the LED driver, do I need a dimmable one?
Any help is appreciated!