I think it will work right as long as you connect the wires properly on both ends.
How would I go about PWM controlling a 6v 300 ma led module?
ULN2803A IC to gate the 6v 300ma power, and Pi or pca9685 for pwm. You can also use most logic level mosfets (the one I showed in adafruit guide).
OK I was just about to ask that so I can use either a ULN2803 or an N-channel MOSFET. Since I already have a ULN2803 @ 12v with 4 free slots I suppose I should try to maybe find 12v led lights and use the existing setup.
Going to try and reduce the size of the tilesIN reef -pi >> dashboard >> Configure >> Columns change the Columns value to 2
Are all LED's dimmable using PWM? For example https://www.amazon.com/gp/product/B...title_srh_1?ie=UTF8&psc=1&smid=A19PINGUYHMOO6 says its not dimmable but does that mean non-voltage dimmable but PWM would work?
With many of these devices having power monitoring, would it be possible to get some validation checks on whether devices are actually turned on/off when reef-pi tells them to? Additionally some monitoring of pumps and such as they start pulling more power when they are getting dirty.
LEDs are dimmable via PWM, but many of the drivers/power supplies may not support it direclty. The lights you linked to just seem to be a strip of LEDs pre-configured to work with 12v; they don't include a power supply. You should be able to use a mosfet or even ULN2803 to dim these kinds of strips with your own 12v supply.
That's what I thought. Maybe I'll buy those or some other one.
Get a strip of 5730 led or a cheapy light based on the 5730 they are brighter than the 3528s ...they will dim nicely and are bright enough to add some blue kick during the day if you need it
Thanks for the suggestion but I already bought some https://www.reef2reef.com/threads/reef-pi-the-all-in-one-pi-challenge.592733/page-9#post-6185856 I don't really need them to be super bright as I am only looking to use at night.
yes, both simple float switches or dfrobot photoelectric sensors should work
I use the coralife strip that came with the biocube, and power it with 12v 1A power supply, using pi pwm + a logic level power mosfet.
Yes. you can use darlingtons (unl2803) or power mosfets . The later are rater for higher current, while unl2803a is only good if your overall current draw is less than 700ma. Meanwell drivers are the one that are rated for even higher current and optimized for LED usage (constant current)
Should be, its not exactly dimming that we are doing with pwm, its more like very fast on/off .. at least with the lunar lights, since im controlling the power directly, while for kessil we only provide the control signal, i dont know internally its mapped to variable voltage (say 0-90W) or pwm (very fast on/off, and the % of on is controlling the dimming effect)
Should be. Something i am willing to consider post 3.0. not before that .. unless anyone else willing to do the engineering work :-)
Spot on.. i have those and i dim everywhere.. :-) kitchen, bathroom., wife's closet .. its not needed.. but why not :-) , it will be cool to simulate storm effect in every corner of the home during halloween
Sometime before the 3.0 final release (thanksgiving). It's not priority right now.. but yes it's a simple logic to add but due to the complex nature of software development the actual work is lot more than that (UI, tests etc). So its better to get started with this while we work on some other temperature controller feature such as hysteresis
