What size resistor to light 3.3V LEDs from a 3.3V circuit?
28135
Can I use blue-green LEDs as MCU state indicators on 3.3 V power?
126344
How much power should 14.4W LED strip consume?
106586
How to amplify 3.3V to 10V by using an NPN transistor? How to select resistor based on current, how does the amplification happen?
7621
Reducing voltage with resistors
122522
Interfacing switch and LED
130958
What resistor is needed to regulate the current through 2 3V LEDs in series with a 9V battery?
45287
A question on pull up resistors
153812
Resistor value for Opto-coupler input
23382
Need single-shot 1 minute delay-off LED circuit
51708
Why do LEDs not obey Ohm's law?
123182
Calculate resistors value in voltage divider
40711
Getting higher power output by using more resistors
113869
What should the minimum voltage rating of replacement power resistors be?
18374
How do I calculate the required value for a pull-up resistor?
14302
How does the current limiting resistor for an LED affect current and voltage drops?
117910
How to drive multiple LEDs from a Li-ion battery (with varying voltage)?
136180
How to use resistors?