On Wed, Sep 17, 2014 at 11:47:03AM +0100, Robert McWilliam wrote: > On Tue, Sep 9, 2014, at 11:58 PM, Robert McWilliam wrote: > > I have 10 10W LEDs and a power supply that can drive them. Calum has > > volunteered to source appropriate switches and a box for to put them in > > and we have plans to wire that up and have much light available (the > > same as the 100W LED but from 10 points rather than 1). > > I did some playing with a couple of the LEDs last night. These are eBay > rated 10W LEDs that actually max out at about 3W, but at that power > they're a bit unstable and some of the array switches on and off > annoyingly. Running them at about 1.5W they look to be prefectly stable > so I'm now targeting that. > > Looking at the amount of light they kick out running in that set up I > still think they're useful. One advantage of being much lower power > than originally claimed is that there is no need to worry about the > heat: I left one on for more than an hour yesterday with only the flat > thin metal permanent heatsink and it only got to 30°C (I did some > playing with wrapping it in paper to see if reducing airflow > possibilities would make a difference - it didn't).
That sounds good, how are you planning on mounting them? Do you think they could be mounted in the corner of a ceiling tile? The metal frame that the tiles sit in could act as a further heat sink. > Because this was looking like a project that wouldn't involve any coding > I have tagged on some plans to make a stupidly complex control system. > The plan now has a switch and relay for each LED so that they can be > switched by either, wire the relays to an arduino along with some > sensing of what position the toggle switches are in and then make a web > page on doorbot that can control the lights. We could also put some > intelligence in there to have automatic lights... While you are devising this you could incorporate the EL wire I put in the door yesterday? The current set up isn't ideal, it wont be long before someone leaves it on and we come back to a dead sign. > Robert > -- > Robert McWilliam r...@allmail.net www.ormiret.com > > Disclaimer: Opinions cited by me are not necessarily my opinions. > Facts cited by me are not necessarily facts. > _______________________________________________ > 57north-discuss mailing list > 57north-discuss@lists.57north.co > http://lists.57north.co/listinfo/57north-discuss -- Tom @adventureloop adventurist.me :wq _______________________________________________ 57north-discuss mailing list 57north-discuss@lists.57north.co http://lists.57north.co/listinfo/57north-discuss
