5mm LED + 220 Ohm Resistor Pack

This 5mm LED + 220 Ohm Resistor Pack is a practical, value-packed assortment for anyone building basic electronic circuits, microcontroller projects or visual status indicators. The kit includes 30 diffused 5mm LEDs in the most commonly used colours: red, yellow and green, along with 30 pieces of 220Ω 1/4W resistors so each LED can be used with its own current-limiting resistor. It is a convenient choice for Arduino LED blinking experiments, Raspberry Pi GPIO indicators, breadboard prototyping, electronics lab activities and school STEM projects. LEDs must not be connected directly across a supply without current limiting. The included 220 ohm resistors help restrict current flow and protect the LEDs when used in typical low-voltage circuits such as 5V logic outputs. The resistor is connected in series with the LED, either on the anode or cathode side. For polarity, the longer LED leg is normally the anode positive terminal, while the shorter leg and flat side on the LED body indicate the cathode negative terminal. The diffused 5mm body gives a softer, more visible glow compared with clear lens LEDs, making these components suitable for panel indicators, logic level display, traffic light models, signal status lights, hobby electronics, robotics and simple decorative lighting. The three-colour assortment helps you assign intuitive meanings such as red for warning, yellow for standby and green for active or OK status. Package includes 10 red 5mm LEDs, 10 yellow 5mm LEDs, 10 green 5mm LEDs and 30 x 220Ω 1/4W resistors. This is a non-programmable passive/optoelectronic component pack and requires an external circuit, power source or controller for operation.