Comments on: LED Puck: Parts List Draft http://www.neufeld.newton.ks.us/electronics/?p=199 Sun, 08 Dec 2024 17:19:24 -0600 hourly 1 http://wordpress.org/?v=3.1.3 By: Keith Neufeld http://www.neufeld.newton.ks.us/electronics/?p=199&cpage=1#comment-21202 Keith Neufeld Fri, 04 Jan 2008 22:27:26 +0000 http://www.neufeld.newton.ks.us/electronics/?p=199#comment-21202 Dave, I'm really enamored of the idea of USB charging. As fun as it would be to put a solar cell into this puppy so it could be laser-charged, I don't think that's very practical. :-) I'll probably settle for a mini-USB connector, put a lot of silicone goo behind it to make it watertight, and be pretty careful about isolating the connector from the rest of the puck when it might be immersed. I really don't want a LiPo battery discharging rapidly through impure water . . . Dave, I’m really enamored of the idea of USB charging. As fun as it would be to put a solar cell into this puppy so it could be laser-charged, I don’t think that’s very practical. :-)

I’ll probably settle for a mini-USB connector, put a lot of silicone goo behind it to make it watertight, and be pretty careful about isolating the connector from the rest of the puck when it might be immersed. I really don’t want a LiPo battery discharging rapidly through impure water . . .

]]> By: Dave http://www.neufeld.newton.ks.us/electronics/?p=199&cpage=1#comment-21199 Dave Fri, 04 Jan 2008 22:14:00 +0000 http://www.neufeld.newton.ks.us/electronics/?p=199#comment-21199 Instead of the USB interface (which requires a connector, which will cause problems making the device water resistant), have you considered an optical link? Dave Instead of the USB interface (which requires a connector, which will cause problems making the device water resistant), have you considered an optical link?

Dave

]]> By: Keith Neufeld http://www.neufeld.newton.ks.us/electronics/?p=199&cpage=1#comment-21126 Keith Neufeld Mon, 17 Dec 2007 19:58:54 +0000 http://www.neufeld.newton.ks.us/electronics/?p=199#comment-21126 Leslie, thanks for the pointers. I have some 5mm LEDs on the way, as well as a couple of Luxeon-like LEDs and some real Luxeons at home. I <em>hope</em> we don't need Luxeons for adequate brightness -- I'm worried about the power density of the battery. But I'll keep those in mind. Leslie, thanks for the pointers. I have some 5mm LEDs on the way, as well as a couple of Luxeon-like LEDs and some real Luxeons at home. I hope we don’t need Luxeons for adequate brightness — I’m worried about the power density of the battery. But I’ll keep those in mind.

]]> By: Leslie Wong http://www.neufeld.newton.ks.us/electronics/?p=199&cpage=1#comment-21125 Leslie Wong Mon, 17 Dec 2007 19:48:21 +0000 http://www.neufeld.newton.ks.us/electronics/?p=199#comment-21125 I don't know if these would be useful for your puck, but there are some Chinese vendors (and I guess US ones) that sell high power <a href="http://www.cree.com/products/xlamp7090_xre.asp" rel="nofollow">Cree LEDs</a> and other LEDs that are much brighter than the 5mm LEDs for $3 to $10 (US).. This <a href="http://www.dealextreme.com/details.dx/sku.2394" rel="nofollow">Cree XR-E 7090 Q5 bin</a> is currently one of the brightest (<a href="http://www.cree.com/products/pdf/XLamp7090XR-E_B&L.pdf" rel="nofollow">PDF specs</a>). With 3.7Vf at 350ma, they put out 107lm. They also sell <a href="http://www.dealextreme.com/products.dx/category.917" rel="nofollow">inexpensive driver circuit boards</a>. I've bought parts for modding flashlights from two of them, DealExtreme.com and Kaidomain.com. The one disadvantage is these vendors take 4 to 6 weeks for delivery. I don’t know if these would be useful for your puck, but there are some Chinese vendors (and I guess US ones) that sell high power Cree LEDs and other LEDs that are much brighter than the 5mm LEDs for $3 to $10 (US).. This Cree XR-E 7090 Q5 bin is currently one of the brightest (PDF specs). With 3.7Vf at 350ma, they put out 107lm. They also sell inexpensive driver circuit boards.
I’ve bought parts for modding flashlights from two of them, DealExtreme.com and Kaidomain.com. The one disadvantage is these vendors take 4 to 6 weeks for delivery.

]]> By: Joe Zimmerman http://www.neufeld.newton.ks.us/electronics/?p=199&cpage=1#comment-21122 Joe Zimmerman Mon, 17 Dec 2007 15:00:42 +0000 http://www.neufeld.newton.ks.us/electronics/?p=199#comment-21122 I'm curious about the tethered charging and reprogramming. I was looking to do this on one of my Arduino projects as well. I saw in a previous post relating to the charging circuit and looking into the Chumbys, I didn't know those took a charge, as they don't even come with a battery. LED PUCK = AWESOME! I’m curious about the tethered charging and reprogramming. I was looking to do this on one of my Arduino projects as well. I saw in a previous post relating to the charging circuit and looking into the Chumbys, I didn’t know those took a charge, as they don’t even come with a battery. LED PUCK = AWESOME!

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