testing a led

Flashlight Modding and DIY Parts
1

Hey guys I have a sbt-70 and would like to test to see if it’s a working led so how can I test that high power led ? (With out a driver)

2

I use one of these with a half charged old battery for quickly testing <4v LEDs

Or a DMM set to diode mode.

3

I did the diode mode but nothing I don’t think my DMM is large enough to power this big led

4

For “regular” star-mounted LEDs (ain’t familiar with the SBT70), I’ve taken one of those 3×AAA tubes/adapters and with clip-leads just bridge that across the LED.

Same internal resistance that limits current to 5/7/9/13 LEDs in one of those silly flashlights provides decent yet limited current to the test-LED.

And clip-leads often have hair-thin wires inside, further limiting current to keep it the LED from instantly going “pouf!”, too.