raspberry pi 3V LED. What resistor to use?
111889
led resistor calculation, and resistor wattage?
32052
how to reduce DC voltage using resistors?
36312
Changing the resistor to be in front or behind an LED doesn't affect brightness?
42002
Why must resistors be on the respective anode terminals instead of the common cathode terminal of a RGB LED?
2819
Why exactly can't a single resistor be used for many parallel LEDs?
93985
Control 5v relay through 3.3v GPIO using NPN transistor
92255
How can I use a 12 V input on a digital Arduino pin?
142361
Do I need a base resistor for a BJT?
116213
Can Altera GPIO pins read the input voltage?
23708
Resistor in series
50353
How to choose value of resistor in voltage divider?
122522
Interfacing switch and LED
96041
A question about E12 series resistors
78779
How to use a Raspberry Pi Pin(3.3V) to reset a ATMEGA328(5V)
28135
Can I use blue-green LEDs as MCU state indicators on 3.3 V power?
51708
Why do LEDs not obey Ohm's law?
136180
How to use resistors?