Bead LEDs

Thread Starter

biferi

Joined Apr 14, 2017
522
I just saw these very very little LEDs.

I always see the little LEDs on a wire with a Battery Pack called string LEDs.

These are like Bead LEDs can anybody tell me where I can Buy just the Bead LEDs?
 

jiggermole

Joined Jul 29, 2016
185
all the ones I looked at were 2020 sized surface mount leds that had fine wire soldered to the pads.
Id probably look at that 2020 sized SMT (surface mount technology) leds. If your eyesight isn't the greatest or your hands shake like mine when soldering you may want to look for the 5050 sized. 2020 means 2mm x 2mm, 5050 means 5mm x 5mm.
 

Thread Starter

biferi

Joined Apr 14, 2017
522
Well I do have small LEDs with Leads on them.

They take 20 mA so a 4 X Dabble A Battery Pack will last very short.

When I saw these very small LEDs almost like Beads all spaced out say 5. Inch apart on a wire I loved it.

Do they sell any LEDs that take less then 20 mA with the Leads wired on them?
 

Ya’akov

Joined Jan 27, 2019
10,226
The LEDs will operate at much lower current. You just need to choose your current limiting resistor as required.

The LEDs used for those products are no different from the ones you already have.
 

liaifat85

Joined Sep 12, 2023
200
I just saw these very very little LEDs.

I always see the little LEDs on a wire with a Battery Pack called string LEDs.

These are like Bead LEDs can anybody tell me where I can Buy just the Bead LEDs?
Only spare bead LEDs are available on Amazon. If you want bead LED strips, those are available on Adafruit.
 

Thread Starter

biferi

Joined Apr 14, 2017
522
I did find this LED but it is not a Bead LED.

It is 2. Volts at 2. mA.

This sounds great for me but one thing?

The Brightness is 2. mcd.

What would this be equivalent to?
 

sparky 1

Joined Nov 3, 2018
1,218
2mcd (2 micro candelas) is very low light output, not very bright. max power rating is do not exceed 4mW and it is old technology.
A color assortment of 20,000 mcd sometimes referred to as superbright is spectacular, they will draw 18-20 mA if you buy right.
There was a time long ago where 2mcd made by HP. Those are outdated and not much use, just lame nostalgia.

I like the red 1.8V leds 3mm diameter rated 10mA 18mW max more difficult to find now.
I can set the brightness at various levels mostly used as indicator on panels but good for many experiments.
The brightness is set with resistor value it can be very efficient, the advanced materials gives more light than older variety.

Understanding lumens and candelas, forward voltage, current and maximum power can improve your understanding of
the fake unspecified leds, A smarter choice is where the vendor describes the specifications and there is no guessing.
Try not to get stuck with crumby stuff,
 

Ya’akov

Joined Jan 27, 2019
10,226
2mcd (2 micro candelas) is very low light output, not very bright. max power rating is do not exceed 4mW and it is old technology.
mcd is the abbreviation for millicandela, µcd (or even ucd) is for mircocandela. This is a difference of three orders of magnitude, that is, 1000 times! While 2mcd is not very bright, it is a 1000 times brighter than 2µcd.

You are certainly correct, though, that the reason for that LED being sold is not for new designs. It is clearly intended as a replacement part on older equipment that used earlier LED technology.

I am not sure why @biferi is looking for LEDs when he has perfectly good ones already that just need appropriate current limiting resistor(s).
 

BobTPH

Joined Jun 5, 2013
11,494
am not sure why @biferi is looking for LEDs when he has perfectly good ones already that just need appropriate current limiting resistor(s).
Because he does not seem to get it that the current rating is a maximum, not a requirement, and that running a 20mA LED at lower current, like 2mA, is fine and will produce about 1/10 the rated output (mcd.)
 

ElectricSpidey

Joined Dec 2, 2017
3,319
I would also point out that "Bead LED" is just some useless slang used by some Asian sellers and not a real type of LED.

The link in post #10 is a 5mm 2 pin DIP LED.

And the rating is pie in the sky. (2 watts lol)

And I have a bridge to sell anyone that would pay 6 bucks for a single standard red LED.
 
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