Comments on: Simply a Bright Idea

By: Kathi

Kathi — Wed, 13 Oct 2010 20:40:13 +0000

Where can I buy the paperclip LED? I need it soon for an art project I am doing. I need to hide the actual light and just have the space lit up! Its perfect! please email me back right away, I don't see anything else like this anywhere else. Great job Sungho! Thanks Kathi

By: Kathi

Kathi — Wed, 13 Oct 2010 20:40:13 +0000

By: 简单又好用|LED发光灯

简单又好用|LED发光灯 — Mon, 28 Jun 2010 05:39:30 +0000

[...] Designer：Sungho Lee << 小酌怡情，大喝伤身|贪杯提示酒瓶 | [...]

By: Artifakt

Artifakt — Tue, 22 Dec 2009 04:33:21 +0000

If you hike and camp, weight can be really critical. A very light weight source that lets you carry several means you could bring along enough to mark, say, the path to where you dug your john, or between tents, and maybe have a little more space for more food or a book to read with them or whatever. These are so light and small, you could also use some caving, or rescue or emergency services or just about anywhere you were already carrying nearly as much load as possible (except maybe combat, where more white lights are not usually useful).

By: Artifakt

Artifakt — Tue, 22 Dec 2009 04:23:30 +0000

The basic LED used to have a strong tendency to overdraw power and go pop unless there was some other source of resistance in the circuit. It also typically drew 3.3 or 5 volts, not 9. Some, NOT ALL of the newer white and blue LEDs are capable of going 8 or 9 in some cases.
The idea for putting a real resistor in the circuit was the resistance sources needed to be something that their share of the total resistance always went up faster than the LEDs if the circuit heated. Everything, wires, connections, even the battery’s own internal resistance changes with heat, and so does the LED’s. LEDs have gotten better about this, but it’s still possible to get combinations of environmental conditions that can cause run away.
Just picture all the possible combinations of system temperature – what if the area around the battery is better thermally insulated than the bulb end, or vice versa, what if wires are insulated with black and the sun shines on them, what if part of the circuit is shielded from wind and another part isn’t, all sorts of seemingly trivial factors like that, and you can see why good engineering practice is to include something that is formally manufactured to provide good resistance over a broader range, in circumstances where battery or wire resistance may change a lot and the LED’s a lot more.

By: J

Tue, 16 Jun 2009 20:50:15 +0000

It really blows my mind how many people call this brilliant design. As said above, you turn it off and you have two tiny objects instead of one. This is a case where someone has taken something that is functional and simple ($5 LED light at REI) and over designed it into something that is no longer functional and a hassle to use. Once again, the design community fails in supporting bad design.

By: girator

girator — Wed, 10 Jun 2009 01:04:54 +0000

re-sis-tor
it’s OK the voltage is right, but too much current get trough the LED and kill it early.

By: ghettoballz

ghettoballz — Thu, 21 May 2009 23:28:24 +0000

have you ever even put a light together? nicads are 3 volts and you don’t need a resistor unless you have like a freakin 9 volt!

By: tidor

tidor — Thu, 21 May 2009 04:25:54 +0000

useless but cute..

By: stev

stev — Thu, 21 May 2009 03:53:24 +0000

if you turn off it, just insert battery to the clip opposite direction, +,-. And that can be really intuitive switch by itself.