Is there any problems with driving a single 5mm LEDs off of a single or parallel 18650 batteries?
117910
How to drive multiple LEDs from a Li-ion battery (with varying voltage)?
134328
What are the 'knuckles' on through-hole LEDs and photodiodes for?
123900
How do I design a circuit for a bi-color led to display power?
30292
How do I calculate the resistor value for a simple LED circuit?
130603
Why is voltage added when batteries are connected in series but not in parallel?
83628
Resistor in series needed with LED string?
42002
Why must resistors be on the respective anode terminals instead of the common cathode terminal of a RGB LED?
28361
How can I drive 12v LEDs from my Arduino Nano?
9182
Driving LED with PIC 5V
108234
Driving a LED with an open drain digital output
84680
Will a battery short out when the terminals are directly connected together or will internal resistance save it?
97680
What happens to the semiconductor in an LED when it is given voltage that it cannot handle?
10649
Adding mAh when wiring battery cells in series?
129278
simple, energy efficient circuit to make single IR LED blink
111889
led resistor calculation, and resistor wattage?
14112
Why would one drive LEDs with a common emitter?
140667
Is a diode needed for this simple mini solenoid circuit?