led I can stick on a AA battery
30292
How do I calculate the resistor value for a simple LED circuit?
114801
Amplify current and voltage to preserve battery
113225
LED bulb still emits light when turned off
115903
Simple light bulb operated by button and optoisolator triac
33926
Calculating resistor value and power rating for LED driving
59891
Power LED bed lamp from mains
62075
Does a "capacitor" for light exist, which could filter out flickering?
89063
How do I emit light from inside a object?
62888
How to power a button's LED within a guitar?
133986
Multiple two pin multi-color LEDs pattern - how does this work?
127515
Is it OK to put LEDs in parallel?
23382
Need single-shot 1 minute delay-off LED circuit
54835
Why does a resistor need to be on the anode of an LED?
76146
Use Caps Lock LED as HDD LED (or custom) indicator
6152
Automatically switching from 9V battery to DC wall adapter on insertion
36312
Changing the resistor to be in front or behind an LED doesn't affect brightness?
148596
Always be 100% bright when I'm using battery