Anyone made their own LED lamp?

which part of the process is proving problematic?

NT

You could do worse than the LED-light example on page 835 of AoE III. I prefer purchasing my high-intensity lamps, but Paul made his own. A fan takes care of the obligatory heat.

BTW, Jim, AoE is largely free from errors now, 5th printing on, and Amazon just dramatically lowered their price. Time to get your copy, and start enjoying all the cool stuff we spent 10 years putting into chapters 5 through 15.

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 Thanks, 
    - Win

There's now a Kindle edition? Wow! Great news. I expect that will help with the educational customers who've switched to using tablets.

Thanks for all the great work, Win and Paul.

-Rich S.

Actually you can over wrap the tape. The tape has two conductors pretty much like 300 ohm twin lead. Between the two conductols is a semi conductor that is high resistance at tempereatures above about 35 degrees F.

Dan

Yeah again sorry... George H.

Does Amazon have the 5th Printing? ...Jim Thompson

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| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| San Tan Valley, AZ 85142     Skype: skypeanalog  |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 
              
I love to cook with wine.     Sometimes I even put it in the food.

Easy to do better. Reptile heater "bulbs" will put out all the heat and none of the light, and are much less likely to burn out and leave you heatless - screw right into a lamp socket so you don't even need to find a plug adapter. I've used 90 and 150 watt sizes (for chicks, which are basically dinosaurs, so they are closer to reptiles than one might think.) Looks like sleazebay will sell you a 100 watt "ceramic heat emitter" for $4.48 shipped.

A "goldenrod" heater (as seen in pianos and/or closets in some necks of the woods) will also work. Purported to be a dehumidifier, but it's just a heater. Probably too rich for your blood, though.

Plenty of low-wattage heat options that are not nearly as fragile as a bulb, if what you need is the heat.

The one place I really like incandescent bulbs is as a self-indicating high-power resistor. And there are still plenty of available bulbs to fill that role.

As for the original question here, I have a bunch of inconveniently modern LEDs. It's so tiny - but you have to attach it to a huge heat sink - but we make that annoying by making it wicked tiny, and possibly (documention is vague on this point - could go either way) not even providing a polarity clue on the device (keep track of how it comes out of the tape, won't you?) on hand with the intent of making a lamp or several, but in actual practice the convenience of $5-$15 bulbs and fixtures has put a cramp in the roundness of that tuit.

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Cats, coffee, chocolate...vices to live by 
Please don't feed the trolls. Killfile and ignore them so they will go away.

There are two types of heating tape products out there. One is consumer packaged fixed length tapes with thermostats on the end. I don't know if they use resistance in the wire or the insulation to generate heat, but they have many precautions on using them.

The other is what you are describing using conductance through the inner insulation (PTC) to generate heat and no external thermostat. This can be overwrapped since the heating element is somewhat self regulating. It does not maintain a temperature "a few degrees above freezing". But it won't overheat easily. When I was looking for heating tapes I found none of this in a consumer product ready to use. Rather it was all sold in bulk for installations on roofs to prevent ice damming. I checked now and it seems you can buy pre-assembled fixed length units now. That still doesn't solve my problems easily as it is still a PITA to install everywhere needed. I have pipes that run in ceilings and walls.

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Rick

Thanks, I'll remember that.

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Rick

From what you posted I was not sure you knew of the second type.

Dan

Amazon has been shipping the 5th printing for quite a while. Some sellers are importing the 6th printing from the U.K., because the list price is lower there. But the 6th printing is identical to the 5th. Both have the first 75 errors and hundreds of minor typos fixed.

The Kindle edition is the 7th printing, and includes a final 15 errors fixed. We haven't learned of any additional errors in the last 3 months, so they must be virtually gone now.

The complete list of fixes is on our website,

Sort it as you wish and saved a file for printing.

--
 Thanks, 
    - Win

OK. _Now_ I'll buy it ;-) ...Jim Thompson

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| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| San Tan Valley, AZ 85142     Skype: skypeanalog  |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 
              
I love to cook with wine.     Sometimes I even put it in the food.

Thanks for the post. Yes, I was pretty through at that time. I even ordered a tape designed to go in a reptile cage, but because UPS is so retarded it never was delivered. I actually can't use UPS anymore if I'm not in the office/home when the guy comes. They won't drop it on the carport like they used to and they won't hold it at the office for me to pick up. They ship it back immediately. What good is a delivery service if they can't handle the last 20 feet?

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Rick

How does one tell one printing from another?

but because UPS is so

With us it is Fedex. They will not handle the last 200 yards. My wife saw the driver over shoot our driveway , back up to our drive , and then went on his way. The UPS driver and the postman do just fine.

Dan

40 watt appliance bulbs are an unreplacable specialty item and will be around a long time. (Don't know too many LED bulbs that will keep running in a 500 degF oven).

Mark Zenier snipped-for-privacy@eskimo.com Googleproofaddress(account:mzenier provider:eskimo domain:com)

This Walmart unit puts out 1,650 lumens from 15W input, for

Another option is to buy two of the WalMart 8.5 watt lamps. They use 8.5 watts for 800 lumens. So not as cheap to operate, but cheaper to buy. They are $2.17 . They are not dimmable, it that is a problem.

Dan

Kindle editions should have free updates.