Archive for the ‘Lighting’ Category:

2016-07-26 Surge Protectors

I have read about, discussed and experienced how surge protectors work and don’t work, and have written about it before, but Ill try again to explain. Ripoff The most egregious thing surge protectors do is take your money. One of the highest, if not the highest profit margin devices in your home is a surge

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2016-02-16 Daylight LED Light Prices

I had to go to the big box home improvement store yesterday, and although I didn’t find the screws I was looking for, I did find that they had LED lights on pallets. I saw both warm white and daylight LED lights of the ‘stick’ kind, I believe one maker calls them bright sticks.  I

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2015-11-30 Low Power Joule Thief With Daylight Shutoff

This has been blogged, here and here.  I added a CdS photocell (resistor with a circle around it) to shut it off during daylight, thus conserving the AAA cell.  I used a 100k resistor for the base bias, so it draws very low current from the cell.  I can then call this a low power

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2015-10-30 LED Nightlights Are Poor Design

I found these at a Walmart store.  They’re named Great Value and came in a package of four nightlights.  As usual, curiosity made me open it up to see the circuit inside. I traced the circuit and drew a schematic of it.  I was disappointed, but not surprised.  The way the CdS photocell works is

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2015-07-21 GE Bright Stik LED Light Bulb

I went to Home Depot this weekend to buy some stuff to fix the leaky toilet, and I walked past the display for the new GE Bright Stik LED light bulbs.  I was attracted to their shape and small size. They come packaged 3 to a box, and there were two types: bright white and

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2015-06-30 RF Interference and LED Lighting

I talked to a club member about LED lights and how much money they saved in electricity.  But he said he stocked up on incandescent lights before they were banned so he could have them for his radio room.  He has had problems with LED lights causing RF interference with his radios, so he went

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2015-05-03 Light Emitting Paper

Quantsuff emailed us a link about a new material summarized at Newscientist.com.  I have a few thoughts that I’d like to add. The stuff should be great for illumination.  But I have doubts about its use for display purposes.  Displays have millions of very small pixels.  If one or a few get contaminated with dust

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2015-04-17 Power Plug, Switch

I do exercise, but when I’m reading couch potato style, I like to have my LED lights with a switch close by.  So I make up extension cords with a plug, switch and outlet socket. I also like to put the on/off switch where the AC power comes into the adapter because there will be

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2015-03-26 CRI Not The Whole Story

I got another email from Designing With LEDs about removing the fluorescent lights from a bathroom and replacing them with Cree LED lights.  The blog shows the charts from a spectrometer showing the difference between the fluo lights, which are deficient in the red, and the high CRI LED lights which have much better lighting

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2015-02-22 Link To Osram Smart Light

QS sent this link to me about Osram’s smart LED light called Lightify. I went and browsed the shelves at Fry’s Electronics. They have the dimmer sockets and remotes on the shelf that use Sky Link.

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