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hi im trying to do a bit of a tare down on the new Evolve EV700 there's very little info on their web site about them . the leds look like lm301b 2700k and 6500k not sure on the cri and poss osram oslon ssl 660nm reds ive taken an educated guess on the leds but i think i'm somewhere near the...

ive just bought some 3000k and some 1750k from digikey but my ones are 69.4v vero29 29c . ive got 6x 3000k and 2 1750k if it was me i would add to your setup and not take out any cobs (just move them around a bit ) as they will just go to waist . but it depends on if you can afford to run...

you should be able to if you buy 1750k with the same voltage ie 38v ones look at the data sheet for them . you could look at the size of the driver and see if you have room to add 1750k with out removing cobs too it would depend on if you have room on your heat sink too though

i was looking at the oslons but they seemed to not have the exact wave lengths i was looking for ie 655/ 660 they seemed to only have higher or lower i think also i couldnt find 625 nm either possibly it was just the suppliers though not having those listed

its alot harder if you do it after a gym session too lol , ive been on a mission today i placed and reflowed over 20 boards its actually very relaxing , i just need my 30 660nm reds noe to finnish the second light for one of my next projects im prob going to have to build a pnp machine prob one...

im trying to identify some cree leds different red ones , is this possible using a led battery tester or even a multi meter i need to find the 660nm ones from a bunch of mixed up ones some are 625nm and some are far reds all cree though . or is there any identifying marks on them to look for ...

thought you did make your own , its not about small hands you need steady hands and tweezers

My design is loosely based on the cree horticultural design but i added xtra blues and some 625nm reds so it has 4000k white ,450nm royal blue , 625nm and 660nm reds and there's 14 sink pad 1950 s with optics and ive built 2 of them well nearly just waiting on a few more reds as was a few...

just wondering why your not running them at 1000ma these can handle 1300ma on the data sheet ive got my setup running at close to 1000ma wiring each board up parallel and using a 36v driver thats got 2.8a that runs 3 boards , but you can do the same by using a driver with even higher amps...

fing cree they have changed the markings on the new XPE2 RED the dot on the front is opposite all the other leds have the dot the same side as the arrow on the back just flipped those leds on the pcb and it all works great

thanks. . yes they seem to be the dot is facing the + (cree leds) the only difference i can think off is the ones i just hand blobed the solder on the pcb had load s more solder on and work . The ones with the stencil dont work must be the amount of solder im thinking

im also using sink pads but im having an issue with the leds not lighting up after reflow. leds all are fine i think its the stencil ive been using isnt getting enough paste under the leds . im thinking of taking all the leds off and putting more paste on an re doing them . do i need to do...

just stumbled accross this old post were growmau was doing something simular https://www.rollitup.org/t/i-need-help-5v-to-10v-pwm.894383/

just found this on how to uses a arduino to dimm 0-10v using a 0-5v signal http://bildr.org/2012/03/rfp30n06le-arduino/ it should translate to a wifi esp 32 or something similar its basically its High-Power Control: Arduino + N-Channel MOSFET

i've got loads of wireless esps laying around that can dimm 0-5v and also have some pwm boards . so i most likely will just pop one on the dimming lead and not mess with the sonoff too much prob only to install new firmware to help me get them working with mqtt and node red . The other esps...

will figure out how to dimm my drivers remotely using another microcontroller perhapes on the dimming lead. but the sonoffs do have extra gpio pins that i think can be settup to send a 0-5 / 0-10v for a dimming lead but that is a hack though. i do have 16 sonoff s on the way to me so i...

im just finnishing off my light thats based on the cree hort design but im running at about 950ma only because i have 3 x 36v 2.7a drivers laying arround i mught get some 1050ma drivers in the future though ive added some royal blue xp g3s and some 625/630nm reds in too as i felt that it was...

do you know if there is a dimming using the app using the sonoff basic or is it just timer etc i think there is a slide bar in the dropdown menu that allows dimming looking at a video but not sure

you can set up a old router that's not in the internet to give you a wifi network to connect it all to prob the simple est solution (intranet )

yes as you can reprogram them like with most esp s the create there own wifi network lots on this on you tube and google or if you have a pi you could set up a web server and use that wifi network or something like this perhapes https://www.npmjs.com/package/simple-sonoff-server