My Review of Red LED with Holder (2-Pack)

Originally submitted at RadioShack

Use with digital clocks and remotes. Typical MCD is 0.8. This Red LED has a typical wavelength of 655nm.

Red LED with Holder (2-Pack)

Good for on-off indicator

By Beachastro from Hampton, New Hampshire on 2/7/2011

 

4out of 5

Pros: Pkg instr actually clear

Cons: Hole dia not specified

Best Uses: On off ind

Describe Yourself: Enthusiast

Primary use: Personal

Was this a gift?: No

Pkg reads: Power diss. 110 mW, Fwd. current: 40mA
Fwd voltage: 1.7V at 20mA
Luminous intensity: 0.8mcd at 10mA
Long lead is anode (+) connection

Unlike many of the other packages, this one had enough info to actually calculate the resistor required! Since my power supply was 12V I ended up using 2.2K ohms to get the dimmest light I could. A 1K resistor was just too bright, this will be used outdoors while observing with a telescope so dim is better. BTW, correct hole size is 15/64". :-)

(legalese)