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Samsung sets new Photon Efficacy Level
Posted: Tue Apr 23, 2019 9:44 pm
by Jacques
Re: Samsung sets new Photon Efficacy Level
Posted: Fri Apr 26, 2019 9:49 am
by Artificialsun
I am excited to get some of em. They’re probably going to be expensive little buggers.
Re: Samsung sets new Photon Efficacy Level
Posted: Fri Apr 26, 2019 5:56 pm
by unkle_psycho
I think Samsung makes them as cheap as possible, its the people who make value added products that tend to jack prices up.
Re: Samsung sets new Photon Efficacy Level
Posted: Tue Apr 30, 2019 9:39 am
by Artificialsun
I have been mounting lm561c chips to MCPCBs rather than buy prebuilt fixtures. The real cost of building them is remarkably less than any I found for sale. Even the cheapest Chinese brands would be far more expensive to buy than the amount I spent on components. Not to mention I can't help but think some manufacturers don't use genuine diodes or follow reflow temperature profiles like they claim.
Re: Samsung sets new Photon Efficacy Level
Posted: Tue Apr 30, 2019 11:32 am
by unkle_psycho
Artificialsun wrote: ↑Tue Apr 30, 2019 9:39 am
I have been mounting lm561c chips to MCPCBs rather than buy prebuilt fixtures. The real cost of building them is remarkably less than any I found for sale. Even the cheapest Chinese brands would be far more expensive to buy than the amount I spent on components. Not to mention I can't help but think some manufacturers don't use genuine diodes or follow reflow temperature profiles like they claim.
What type of mpcb's have you been working with? I looked at the starboards, but its hard to do anything large with them
Re: Samsung sets new Photon Efficacy Level
Posted: Wed May 01, 2019 12:06 am
by Artificialsun
174*286*1.6mm aluminum, 288x5630 chips wired 16s18p. It has been a seriously long learning curve but I’m pretty well set up finally and my fabrication is going smoothly, more or less. My cost per board is less than $20, not including heatsinks and drivers.
Re: Samsung sets new Photon Efficacy Level
Posted: Wed May 01, 2019 3:04 am
by The_Mouse_Police
Artificialsun wrote: ↑Wed May 01, 2019 12:06 am
174*286*1.6mm aluminum, 288x5630 chips wired 16s18p. It has been a seriously long learning curve but I’m pretty well set up finally and my fabrication is going smoothly, more or less. My cost per board is less than $20, not including heatsinks and drivers.
where are you getting the boards? Alibaba vendors don't seem to list bare boards much cheaper than $20, before shipping.
Re: Samsung sets new Photon Efficacy Level
Posted: Wed May 01, 2019 4:56 pm
by Artificialsun
They’re from Kingbrite. I wouldn’t want to trust most Alibaba suppliers too much. It is just too hard to verify their claims, but I’m pretty comfortable using their circuit boards.
Re: Samsung sets new Photon Efficacy Level
Posted: Wed May 01, 2019 7:43 pm
by unkle_psycho
So do the diodes kinda snap into place like with starboards?
Re: Samsung sets new Photon Efficacy Level
Posted: Thu May 02, 2019 10:09 am
by Artificialsun
I thought my experience with star boards would come in handy but with the 288 boards I had a really hard time getting them right. At least 300 chips sacrificed themselves while I was getting the technique zeroed in. Now that I’ve gotten past that phase they will align themselves to an extent but if they’re outside of exact a wee bit more than they want to be they'll end up FUBAR.