LEDs ... The Good, The Bad, and The Ugly

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W.

Thanks for the info. [edited highlights above]

Your closing line supports the title and purpose of this thread.

MichaelG.

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Edit: MC34063 Application Note, for reference.

Edited By Michael Gilligan on 30/11/2014 08:24:08

A quick warning for those using LED torches, etc.

Check the condition of your batteries. ... Don't wait until they are exhausted.

I have just sawn open a rather nice 1 Watt LED torch with a robust Aluminium body

This one was only used occasionally; being kept for finding 'things dropped'

The light output was fading a little, so I decided to treat it to two new Alkaline AA Cells.

... Hang the expense, it's Christmas time

Too late, already ... Although the torch was still working, one of the two cells had leaked, and the caustic content had seized the thread on the end cap.

MichaelG.

Reviving an old thread:

LED enthusiasts within reasonable distance of Ashton-under-Lyne might like to visit IKEA.

Today, in the 'Bargain' area they had a large box containing [probably a couple of hundred]:

LEDARE LED

90 lm, 2.2 W, 12V

GU4 fitting, LED1201R2

These were previously £4 each, and are offered at 50p

MichaelG.

Regarding LED lamps, this is not strictly relevant, but the info contained may be of help to someone, Everyday Practical Electronics, Sept 2016, page 30 et al. This is the current issue. Build a party strobe light, using a mains powered LED floodlight bought online for about £10.

Geoff

I decided to resurrect this old thread especially for Dyson junior's entry into the lighting business:

**LINK**

https://www.wired.com/2016/12/dysons-cu-beam-duo-radically-new-office-lamp-seriously/

What do you think of the Cu-Beam ?

MichaelG.

Haha. Something like $3-4k each. If you don't ask, you don't get. Like most Dyson stuff it will be trading off the very heavily marketed brand name (which is actually their core strength in my view), rather than any significant technical merit. Rather like the myth of the reliable VW.

Microdyson says "because the lights emanates from a single source, they focus like a dream". Not certain I actually want highly focussed overhead light myself. Sounds more like a nightmare than a dream, although possibly not quite as unsufferable as having to spend time in the same room as his father.