Yellow LED - Exploring Arduino

yellow led

Image courtesy of SparkFun Electronics

An average 5mm Yellow LED has a 2V forward voltage drop, and a forward current of 20mA. Bright Yellow LEDs can have a forward voltage as high as 3.4V – check the datasheet. Don’t forget to use a current-limiting resistor when you connect an LED to your Arduino!

Buy yellow LEDs from Amazon, SparkFun, Adafruit, or Newark.

  • Arduino Uno
  • USB Cable
  • Jumper Wires
  • 10kohm Resistor
  • Half-size Breadboard
  • 220ohm Resistor
  • Pushbutton
  • Red LED
  • Common Cathode RGB LED
  • TMP36 Temperature Sensor
  • Photoresistor
  • SN754410 H-Bridge IC
  • 1kohm Resistor
  • 150ohm Resistor
  • Green LED
  • Blue LED
  • Yellow LED
  • 10kohm Trim Potentiometer
  • 9V Battery
  • 9V Battery Clip
  • 5V L4940V5 Linear Regulator
  • 22uF Electrolytic Capacitor
  • 0.1uF Electrolytic Capacitor
  • 1uF Ceramic Capacitor
  • PN2222 NPN Transistor
  • IR Distance Sensor
  • Servo Motor
  • JST Wire
  • 9V DC Motor
  • Speaker
  • SN74HC595N Shift Register IC
  • Arduino Leonardo
  • Micro USB Cable
  • 2-axis Joystick
  • 4.7kohm Resistor
  • 100ohm Resistor
  • TC74 I2C Temperature Sensor
  • MCP4231 Digital SPI Potentiometer
  • DC Fan
  • 16×2 LCD
  • SparkFun USB Explorer
  • XBee Radio
  • XBee Shield
  • Piezo Buzzer
  • USB Wall Power Supply
  • 10uF Electrolytic Capacitor
  • 74AHCT14 Hex Inverting Schmitt Trigger
  • DS1307 Real Time Clock Module
  • Cooking-Hacks SD Shield
  • Arduino Ethernet Shield
  • Ethernet Cable
  • Tri-Axis Analog Acceleromter
  • Analog Gyroscope
  • Adafruit Data Logging Shield
  • SparkFun MicroSD Shield
  • AC/DC Power Adapter
  • 1N4004 Diode
  • Seeeduino Lite
  • Pololu A-Star 32U4 Prime LV
  • Seeed Studio SD Card Shield V4
  • Adafruit METRO 328
  • Adafruit Feather 32u4 Bluefruit LE
  • Adafruit Feather M0 Wi-Fi with ATWINC1500
  • Full-size Breadboard
  • White LED
  • Common Anode RGB LED
  • 5V L7805CV Linear Regulator
  • 0.1uF Ceramic Capacitor
  • 1N4001 Diode
  • Roving Robot Chassis Kit
  • L293D H-Bridge IC
  • NEMA-17 Bipolar Stepper Motor
  • LIS3DH Accelerometer
  • CR1220 12mm 3V Coin Cell Battery
  • SD Card
  • RF Receiver (315MHz Momentary Type)
  • RF Remote (315MHz Single Button)
  • Enclosed AC Power Relay
  • 4-Digit 7-Segment I2C Display
  • Adafruit MicroSD Breakout
© 2025 Jeremy Blum, Blum Idea Labs, LLC.

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