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LED - Blue (5mm)

LED

Standard 5 mm indicator LED. Always use it with a series resistor.

Specifications

Colour

Blue

Diameter

5 mm

Forward voltage

3.2-3.6V

Forward current

20 mA (max. 30 mA)

Shop prices

• RobotzadePack of 10 · In stock6.00 ₺
• RobotistanPack of 10 · In stock7.10 ₺
• MotorobitPack of 10 · In stock7.57 ₺
• Robo90Pack of 10 · In stock8.93 ₺
• KomponentciPack of 10 · In stock10.48 ₺
• Robolink MarketPack of 10 · In stock13.50 ₺
• RobocomboIn stock1.50 ₺
• F1 DepoPack of 10 · In stock15.00 ₺
• ElektrovadiIn stock1.80 ₺
• HobiDevreIn stock1.92 ₺
• Modül ElektronikIn stock1.99 ₺
• RobotsepetiIn stock2.44 ₺
• Entegre DünyasıIn stock3.58 ₺
• SAMM MarketIn stock5.95 ₺
• Direnc.netOut of stock0.88 ₺

Prices read from the shops' pages on 22 October 2026. Prices and stock may have changed since; check at the shop before you buy.

Projects with this part

• Flame-Sensing Fire AlarmBeginner30 minA fire alarm that recognises a flame by the infrared light it gives off: when the flame sensor sees a lighter or a candle flame, the buzzer plays a rising siren and the red and blue LEDs flash in turn like a fire engine's lights. While idle, the blue LED blinks briefly every 2 seconds to show the alarm is on watch. The alarm does not sound until a flame has lasted half a second, so a single spark or glint does not set it off, and it keeps sounding for 3 seconds after the flame is out. It teaches smoothing the on-and-off digital signal of a flickering flame, filtering out short flashes with a time condition, and playing a siren with millis() while reading the sensor. No extra library is needed. This is a learning project; it does not replace an approved smoke detector at home.Open project