5 mm LED Assorted (R/Y/G/B/W)
by Generic
SKU: PSA-CMP-LED-5MM
No reviews yetTypical India street price
₹20–₹80
Through-hole LEDs — first “hello world” of electronics.
Interface: Discrete / GPIO
Drive an LED (with resistor) or the kit lamp output from the lamp pin.
Lamp/LED → D4 (GPIO2)
Blockly: set_lamp, set_led
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Concept
Diode that emits photons when forward biased.
A little theory
Vf depends on colour (red ~1.8 V, blue/white ~3.0 V). Current 10–20 mA. Always a series resistor. In the classroom, treat 5 mm LED Assorted (R/Y/G/B/W) as a beginner part using Discrete / GPIO. Typical India street price is about ₹20–₹80. Always verify voltage and pin labels on your exact module — silk screens vary across clones. Start with a datasheet or trusted learn guide, power the part correctly, share GND with the MCU, and test with a simple blink/read sketch before building the full project. Measure voltages with a multimeter when something fails, and keep actuator current off the MCU regulator.
How it works in a project
Long lead = anode to resistor to 5 V or GPIO; cathode to GND (or inverted).
Classroom & project use
- Traffic light
- Status
- Binary display
Buying in India
Precautions
- Always use a resistor
- Check polarity
Specifications
| Size | 5 mm |
| Current | 10–20 mA |
| Category | LEDs & Indicators |
| Difficulty | Beginner |
| Voltage | Vf ~1.8–3.2V |
| Interface | Discrete / GPIO |
Pinout
See module silkscreen: typically VCC, GND, and signal pins. Confirm labels against the seller photo — clones vary.
