How much voltage I need to light up this led
1069
Correct formula for LED current-limiting resistor?
62888
How to power a button's LED within a guitar?
122522
Interfacing switch and LED
46538
How long would a 150 Farad Capacitor light up an LED
77248
How to scale and shift voltage signal?
7621
Reducing voltage with resistors
139348
LED Strip Light - Power supply issues
145285
High voltage LED indicator 40-1000 VDC without additional power supply
48777
Resistor requirement for 3.3v
145546
Resistor wattage measurement
79884
How do I connect power to a light bulb?
117910
How to drive multiple LEDs from a Li-ion battery (with varying voltage)?
103078
What value to use to convert ADC value to voltage?
125202
Conversion from microvolt to volt
108234
Driving a LED with an open drain digital output
134426
How do I convert, lower, or raise voltage?
30292
How do I calculate the resistor value for a simple LED circuit?