radio shck bulb would be fine

On Wed, 10 Aug 2005 23:49:07 -0400, (123a 456a) wrote:

radio shck bulb would be fine


The LEDs have a better, cooler light. And they rarely burn out.

Vinnie S.

Thanks...I opened up the radio cut off the bulb and measured 13v off
the leads (I had the radio plugged into an AC- DC converter). So I
went to radio shack and got a 12v 25mA mini lamp (part 272-1141) and it
worked.

However, it doesn't sit too nicely into the space that the original
bulb did (I still haven't heard back from Uniden) and I'm afraid it
might eventually burn/discolor the back of the meter.

The LED idea sounds perfect, but as you can see I'm no Tech, so I
assume that the drop resistor would drop the voltage down to what the
LED would expect?

On 11 Aug 2005 09:52:29 -0700, wrote:


Thanks...I opened up the radio cut off the bulb and measured 13v off
the leads (I had the radio plugged into an AC- DC converter). So I
went to radio shack and got a 12v 25mA mini lamp (part 272-1141) and it
worked.

However, it doesn't sit too nicely into the space that the original
bulb did (I still haven't heard back from Uniden) and I'm afraid it
might eventually burn/discolor the back of the meter.

The LED idea sounds perfect, but as you can see I'm no Tech, so I
assume that the drop resistor would drop the voltage down to what the
LED would expect?


Correct. Most LED handle a few volts. The resistor drops the excess voltage.

Here is a formula where you inpu the LED specs, and it tells you the resistor
value needed. Just fill in the blanks:

http://www.superbrightleds.com/led_info.htm

You are starting to see many of these Super Bright LEDs in flashlights. White is
the color you want.

Also, the intensity in measured in MCD. The higher the number, the brighter (and
more expensive). For example:

http://www.radioshack.com/category.a...2%5F000&Page=1


Vinnie S.

Thanks Vinnie.!!! I think I'll give it a try.