Dave lights up his new backyard deck with Cree XPG LEDs, and then winds up measuring the wind from a storm instead. And do you know the difference between efficiency and efficacy?
Fiiiiine, Dave! I'll binge watch from the start. Maybe I'll catch up by 2030! Thank you for all the work you've done over the years! You've filled in many of the (many many) knowledge gaps in this physicist/software developer's education.
Thermal design is a bastard sometimes. Convection, conservation of energy, emissivity. I do a lot of it, and it never ceases to amaze me. I'm getting into optics now, making portable spotlights. Shooting for 50 watts. I'm reverse engineering a Ryobi P717 LED spotlight. We're going for a 1.0 kilometer target in a reflector exercise.
seeing that drop in the temperature graph got me thinking about the possibility of making a "windometer" or whatever based on this effect. of course after some googling it was already invented, check wikipedia "hot-wire anemometer", its pretty much the same thing and apparently those devices are used for studying turbulent flow. interesting
I was assigned to be the thermal engineer for a group capstone project. At the review, the lead from our sponsor asked who I pissed off in order to get the job. The basic calculations always suffer from a lot of potentially flawed assumptions about the system, and though a finite element model can help with more complex systems it's still GIGO. I don't suppose you ever ran it through a FEM?
Chill! The stress in your voice is way over the top. You'll get a heart attack if you don't learn to calm down. We'd have to heat-sink you if you started talking about something really exciting like politics or religion or football.
Acho que você se refere a frequencias ? Sim é a filosofia do movimento zeitgeist moving forward , mudânça de comportamento social , compreend?
Thanks for giving the update
Absolute class as always
Fiiiiine, Dave! I'll binge watch from the start. Maybe I'll catch up by 2030! Thank you for all the work you've done over the years! You've filled in many of the (many many) knowledge gaps in this physicist/software developer's education.
Interesting project, and interesting to have the results 11 year after ^^
Thermal design is a bastard sometimes. Convection, conservation of energy, emissivity. I do a lot of it, and it never ceases to amaze me. I'm getting into optics now, making portable spotlights. Shooting for 50 watts. I'm reverse engineering a Ryobi P717 LED spotlight. We're going for a 1.0 kilometer target in a reflector exercise.
Couldn't PWM come to the rescue in reducing wasted heat?
How much better are led lights 6 years later?
One of the better videos I've seen of your's – Dave. Funny and highly efficient…
oh how i love Dave!! Thank you brother, i learn so much watching your videos.
What about a COB CXB3590 that puts out more than 50 watts.
Sounds like a job for matlab.
seeing that drop in the temperature graph got me thinking about the possibility of making a "windometer" or whatever based on this effect. of course after some googling it was already invented, check wikipedia "hot-wire anemometer", its pretty much the same thing and apparently those devices are used for studying turbulent flow. interesting
I was assigned to be the thermal engineer for a group capstone project. At the review, the lead from our sponsor asked who I pissed off in order to get the job. The basic calculations always suffer from a lot of potentially flawed assumptions about the system, and though a finite element model can help with more complex systems it's still GIGO.
I don't suppose you ever ran it through a FEM?
been watching all videos from 1 to 50. Suddenly noticed he drops the words "you know" over and over again. great idea for a drinking game, you know 😉
if in doubt, use a bigger heatsink
Do those little stars have a plate on the back for conducting heat but not electricity?
Chill! The stress in your voice is way over the top. You'll get a heart attack if you don't learn to calm down. We'd have to heat-sink you if you started talking about something really exciting like politics or religion or football.