Why does an LED always need a resistor?
14302
How does the current limiting resistor for an LED affect current and voltage drops?
45287
A question on pull up resistors
130958
What resistor is needed to regulate the current through 2 3V LEDs in series with a 9V battery?
42002
Why must resistors be on the respective anode terminals instead of the common cathode terminal of a RGB LED?
23708
Resistor in series
6840
Why are there only RGB and RGBW-LEDs, but none with more chips inside one housing?
90016
What causes a resistor to heat up?
124910
Is a current-limiting resistor required for LEDs if the forward voltage and supply voltage are equal?
42977
Why is there an "electric" potential drop across the resistor?
1069
Correct formula for LED current-limiting resistor?
93477
Does LED brightness change with voltage?
69776
Why is the diode forward voltage constant?
96041
A question about E12 series resistors
121688
Why do you need 2 resistors when hooking up a transistor as a switch
28444
Are two (or N) resistors in series more precise than one big resistor?
74262
Does the resistor have to be before or after the component
140667
Is a diode needed for this simple mini solenoid circuit?