Photoelectric smoke alarms leds harmful?
33055
Is smoke sensor safe for eyes / kids?
107999
Can I safely use a 9w LED bulb in place of a 40w incandescent?
130783
Is there a portable method of preventing all IR radiation from being emitted?
4030
Do I really need resistors when controlling LEDs with Arduino?
82094
Resistor selection for LED
151768
How to turn particle emission on/off?
17781
Why do my LED lights stay on, even when the switch is off?
139633
If I leave my chargers plugged into the wall socket at all times, do they consume energy or present a safety risk?
113225
LED bulb still emits light when turned off
140532
LED as power generator
129278
simple, energy efficient circuit to make single IR LED blink
120655
Expected number of light bulbs on
20330
Why do 7 segment LED displays break apart when I brush my teeth?
151190
Line level voltage to drive LED display
16242
How do two-leaded color changing LEDs work?
123900
How do I design a circuit for a bi-color led to display power?
81970
Is camera flash actually harmful to infants or newborns?