In article , Lizard Blizzard wrote:

eventually burn out, too. So it would be wise to do the right thing and
replace them with LEDs, and they will last tens of thousands of hours.

I replaced a grain-of-wheat lightbulb for a clock-radio dial with one from
Radio Shack. The supply voltage is 5 volts so I bought a 12 volt bulb.

Imagine my surprise when these damned things are only rated for 15
hours!!!!

Are there any 5 volt LEDs around?

--
Sven Weil
New York City, U.S.A.

Sven Franklyn Weil wrote:
In article , Lizard Blizzard wrote:


eventually burn out, too. So it would be wise to do the right thing and
replace them with LEDs, and they will last tens of thousands of hours.


I replaced a grain-of-wheat lightbulb for a clock-radio dial with one from
Radio Shack. The supply voltage is 5 volts so I bought a 12 volt bulb.

Imagine my surprise when these damned things are only rated for 15
hours!!!!

Are there any 5 volt LEDs around?

Any LED can be a 5 volt LED with an appropriate dropping resistor. ;-)

That being said, there *is* an LED rated for operation directly from a 5
volt line. Unfortunately, it's a flasher.

Cheers,
Fred
--
+--------------------------------------------+
| Music: http://www3.telus.net/dogstarmusic/ |
| Projects, Vacuum Tubes & other stuff: |
| http://www.dogstar.dantimax.dk |
+--------------------------------------------+

Fred Nachbaur wrote:

Any LED can be a 5 volt LED with an appropriate dropping resistor. ;-)

That being said, there *is* an LED rated for operation directly from a 5
volt line. Unfortunately, it's a flasher.

Cheers,
Fred

I noticed in the new Mouser catalog that there is a line of LED lamps
designed as direcet drop-ins for incandesent lamps. Horribly expensive
at this time.

-Bill

--- Bill --- wrote:
Fred Nachbaur wrote:

Any LED can be a 5 volt LED with an appropriate dropping resistor. ;-)

That being said, there *is* an LED rated for operation directly from a
5 volt line. Unfortunately, it's a flasher.

Cheers,
Fred


I noticed in the new Mouser catalog that there is a line of LED lamps
designed as direcet drop-ins for incandesent lamps. Horribly expensive
at this time.

-Bill

If you have a parts distributor nearby that stocks (or can order the
Mode line) you might find their variants marginally cheaper:

http://www.mode-elec.com/Products/Page_44-46.pdf

Distributor list he

http://www.mode-elec.com/Distributors/distributors.html

Cheers,
Fred
--
+--------------------------------------------+
| Music: http://www3.telus.net/dogstarmusic/ |
| Projects, Vacuum Tubes & other stuff: |
| http://www.dogstar.dantimax.dk |
+--------------------------------------------+

--- Bill --- wrote:
Fred Nachbaur wrote:

Any LED can be a 5 volt LED with an appropriate dropping resistor. ;-)

That being said, there *is* an LED rated for operation directly from a
5 volt line. Unfortunately, it's a flasher.

Cheers,
Fred


I noticed in the new Mouser catalog that there is a line of LED lamps
designed as direcet drop-ins for incandesent lamps. Horribly expensive
at this time.

-Bill

If you have a parts distributor nearby that stocks (or can order the
Mode line) you might find their variants marginally cheaper:

http://www.mode-elec.com/Products/Page_44-46.pdf

Distributor list he

http://www.mode-elec.com/Distributors/distributors.html

Cheers,
Fred
--
+--------------------------------------------+
| Music: http://www3.telus.net/dogstarmusic/ |
| Projects, Vacuum Tubes & other stuff: |
| http://www.dogstar.dantimax.dk |
+--------------------------------------------+

"Fred Nachbaur" wrote in message
news:xe33b.61864$K44.43700@edtnps84...
That being said, there *is* an LED rated for operation directly from a 5
volt line. Unfortunately, it's a flasher.

Either blue or while LEDs have pretty high voltage. Of course, they
require current limiting, which requires an overhead of voltage...

Tim

--
In the immortal words of Ned Flanders: "No foot longs!"
Website @ http://webpages.charter.net/dawill/tmoranwms

Fred Nachbaur wrote:

Any LED can be a 5 volt LED with an appropriate dropping resistor. ;-)

That being said, there *is* an LED rated for operation directly from a 5
volt line. Unfortunately, it's a flasher.

Cheers,
Fred

I noticed in the new Mouser catalog that there is a line of LED lamps
designed as direcet drop-ins for incandesent lamps. Horribly expensive
at this time.

-Bill

"Fred Nachbaur" wrote in message
news:xe33b.61864$K44.43700@edtnps84...
That being said, there *is* an LED rated for operation directly from a 5
volt line. Unfortunately, it's a flasher.

Either blue or while LEDs have pretty high voltage. Of course, they
require current limiting, which requires an overhead of voltage...

Tim

--
In the immortal words of Ned Flanders: "No foot longs!"
Website @ http://webpages.charter.net/dawill/tmoranwms

Sven Franklyn Weil wrote:
In article , Lizard Blizzard wrote:


eventually burn out, too. So it would be wise to do the right thing and
replace them with LEDs, and they will last tens of thousands of hours.


I replaced a grain-of-wheat lightbulb for a clock-radio dial with one from
Radio Shack. The supply voltage is 5 volts so I bought a 12 volt bulb.

Imagine my surprise when these damned things are only rated for 15
hours!!!!

Are there any 5 volt LEDs around?

Any LED can be a 5 volt LED with an appropriate dropping resistor. ;-)

That being said, there *is* an LED rated for operation directly from a 5
volt line. Unfortunately, it's a flasher.

Cheers,
Fred
--
+--------------------------------------------+
| Music: http://www3.telus.net/dogstarmusic/ |
| Projects, Vacuum Tubes & other stuff: |
| http://www.dogstar.dantimax.dk |
+--------------------------------------------+

In article ,
(Sven Franklyn Weil) wrote:

In article , Lizard Blizzard wrote:

eventually burn out, too. So it would be wise to do the right thing and
replace them with LEDs, and they will last tens of thousands of hours.

I replaced a grain-of-wheat lightbulb for a clock-radio dial with one from
Radio Shack. The supply voltage is 5 volts so I bought a 12 volt bulb.

Imagine my surprise when these damned things are only rated for 15
hours!!!!

Are there any 5 volt LEDs around?

http://www.oxley.co.uk/lamps/bulb_replace.html

http://www.ledtronics.com/pages/News56.htm

http://www.ccrane.com/led_replacemen...ight_index.asp

and many more.

Al

--
There's never enough time to do it right the first time.......