Electronics > Beginners

help to identify this diode

<< < (3/3)

Jwillis:
Check it with with the diode function on your multi meter.If it has a forward voltage of 1.5V and it doesn't shine its probably an IR LED.If it has a forward voltage of 3.6V then it's probably an UV LED.If you get no forward voltage then it's dead.
Red to yellow to green  LEDs will be typically 2V to 2.2V forward voltage .Blue to UV are typically 3V to 3.6V.White has UV elements so typically have 3V Forward voltage.
This chart doesn't have IR LEDs but they have forward Voltages as low as 1.5V .Because a DMM puts a voltage across the LED ,visible ones should shine.

Navigation

[0] Message Index

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod