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Topic: Brightest tiny led 3.3V/5V (Read 250 times) previous topic - next topic

Bjack795

Hi all!

I'm looking for a led to use as a "lamp" in the darkness for an Epaper screen.
I'm using a wemos D32 pro board working at 3.3V (I have the possibility to have a 5V output too).

The led must be placed in a 1x6x1.5 cm box so it should be quite small.

I'm looking for the brightest possibility taking into account these constraints.
(Of course there is always the possibility to use an external power source but this is not what I'm looking for)

Thank you in advance

Paul_KD7HB

Hi all!

I'm looking for a led to use as a "lamp" in the darkness for an Epaper screen.
I'm using a wemos D32 pro board working at 3.3V (I have the possibility to have a 5V output too).

The led must be placed in a 1x6x1.5 cm box so it should be quite small.

I'm looking for the brightest possibility taking into account these constraints.
(Of course there is always the possibility to use an external power source but this is not what I'm looking for)

Thank you in advance
Would help if you told us where you have looked.

Paul

MarkT

Cut down a 12W luxeon star sized emitter?  You never mentioned heatsinking, that is going to be
the constraint to worry about, 12W is available in small packages and 12W LED will light up a small
room...
[ I will NOT respond to personal messages, I WILL delete them, use the forum please ]

Bjack795

Would help if you told us where you have looked.

Paul
I've looked on amazon (usually I would look on AliExpress too but I need it quite fastly)


Cut down a 12W luxeon star sized emitter?  You never mentioned heatsinking, that is going to be
the constraint to worry about, 12W is available in small packages and 12W LED will light up a small
room...
The box is small and kept together with hot glue so I think that overheating could be a problem.

GeronimoDK

How much light do you need!?

"An epaper screen" sounds quite small, I guess the LED will be pretty close? Wouldn't 0.5 - 1W be more than sufficient?

I don't know where you are located so I can't really recommend a shop, but around here from one of my local suppliers there are TONS of options! I had to limit my search quite heavily to not get more than 100 results.
(RS-components)

Bjack795

#5
Dec 10, 2018, 01:08 pm Last Edit: Dec 10, 2018, 01:09 pm by Bjack795
I'm Italian and in the top part of the attached image you can see where the light will be placed.

The question was much simpler than this.
Leds in Arduino community are widely used so I was expecting like "I used this product and it was quite bright" or answers like this.


vinceherman

Have you looked at the LED backlights like those offered by adafruit?
https://www.adafruit.com/product/1621

MarkT

Or a short section of 5V LED strip?
[ I will NOT respond to personal messages, I WILL delete them, use the forum please ]

Bjack795

#8
Dec 10, 2018, 03:50 pm Last Edit: Dec 10, 2018, 05:25 pm by Bjack795
Have you looked at the LED backlights like those offered by adafruit?
https://www.adafruit.com/product/1621

That is I was looking for! Thank you

Edit:
20€ of UPS shipping :O
Edit2:
Found it on a UK website


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