Can I use a single resistor for multiple LED with different +ve sources?
126665
Why do different colored LEDs interfere with each other when connected in parallel?
28292
Making dual power supply from single for opamp?
22076
Why do resistors still use color coding?
139976
How to use 8 IR recievers that when one of them sense IR turn on a LED?
123182
Calculate resistors value in voltage divider
68628
SMD LED: How to calculate optical power (in mW) from luminous intensity (in mcd)?
124910
Is a current-limiting resistor required for LEDs if the forward voltage and supply voltage are equal?
36312
Changing the resistor to be in front or behind an LED doesn't affect brightness?
123900
How do I design a circuit for a bi-color led to display power?
23382
Need single-shot 1 minute delay-off LED circuit
20820
What's the difference of placing multiple resistors and one resistor for limiting the current of LEDs?
30881
How to find the resistor value using the color codes?
144550
Different and opposing voltage sources?
136180
How to use resistors?
129278
simple, energy efficient circuit to make single IR LED blink
153812
Resistor value for Opto-coupler input
16242
How do two-leaded color changing LEDs work?