Driving blue led directly from GPIO
28135
Can I use blue-green LEDs as MCU state indicators on 3.3 V power?
109693
Basic circuit to keep LED either on or off depending on night/day
54404
Set STM32 GPIO clock and data pins as fast as possible
93037
Difference between a LED Backlit and LED HD Display on laptop monitor
79401
How to stop constantly blinking Wifi LED?
83628
Resistor in series needed with LED string?
129016
Optocoupler with phototransistor base lead
140532
LED as power generator
110406
Driving MOSFET gate using PIC
121863
Selecting a MOSFET for driving load from logic
145285
High voltage LED indicator 40-1000 VDC without additional power supply
115903
Simple light bulb operated by button and optoisolator triac
51508
How to control Bluetooth wireless radio from the command line?
156010
Using a diode to ensure current flows in only one direction, without causing a voltage drop
72226
LED conversion efficiency exceed 100%
105529
Detecting state of LED to control another circuit
116213
Can Altera GPIO pins read the input voltage?