To eliminate most soldering you can use 3-terminal "wago lever nut" connectors to connect everything.
That was a great tip ! I did know about them but never get to use some, oh boy was i wrong those things are awesome
Yikes. That's a whole lot of light then.
3x56cm strips, 700ma for each indeed. And yep that's basically having the sun right on top of the fish tank
Bbut plan was never to use them at full power that's why i went with 3 drivers, introducing the controller :
Board : arduino uno r3 clone (ATmega328P)
Display : for now a basic 16x2 lcd (1602a), displaying the time and the pwm % of each strip
Real time clock : TinyRTC (DS1307)
I found a great program wich seems to be popular on a french reef board (i don't know if it's ok to post the link), using an array of 96 pwm values per day and doing averages between, resulting in smooth variations.
Both the PS ground and the LDD Vin- are grounded to the arduino board (i will have to check if it's enough for components safety, i read about pull down resistors or diodes)
After some tweaking and tests, everything seems to be working great and i'm already so glad i went with this multichannel/dimming route !
I have some cleanup to do, and i did not have the time to really appreciate the variations, but first impressions :
- 5700k alone is a great light, good balance
- 3000k alone is nice for sunset/sunrise variations
- adding 3000K to the 5700k add some "crisp" and contrast to the colors
- again, thoses strips are really powerfull, i will likely be at 50% power at most (around 20w, amazing)
Not to mention it is addictive, i am already thinking about adding things (bigger lcd, manual control, temp probe, ph probe...), and making another one for my last fish tank (high tech 10gal)
Photos incoming after cleaning up a little