3mm Round Top – Blue / Red Alternating Flashing LED – 1.5Hz - Ultra Bright
In stock
- SKU
- 3MMBLUEREDFLASHINGLED
- Color
- Blue / Red
- Size
- 3mm Round Top Alternating Flashing LED
- Buy 50 for $0.21 each and save 5%
- Buy 100 for $0.20 each and save 9%
- Buy 250 for $0.19 each and save 14%
- Buy 500 for $0.18 each and save 18%
- Buy 1000 for $0.16 each and save 27%
Description / 3mm Round Top – Blue / Red Alternating Flashing LED – 1.5Hz - Ultra Bright
The 3mm Blue/Red Red/Blue Alternating Flashing LED switches between red and blue from a single two-lead package — both colors in one LED, standard two-pin wiring. No 555 timer, no oscillator, no microcontroller required — just apply DC power through a current-limiting resistor and it starts immediately.
Two leads, two colors: Both the red and blue die are inside the same package with a standard two-lead pinout. No common-anode/cathode wiring. No third lead. Wires like any other 3mm LED.
| Size | 3mm (T-1) |
| Effect | ~1.5Hz (90 alternations/min) — red/blue auto-cycling |
| Forward Voltage | 2.9-3.1 |
| Brightness | 6,000-7,000mcd |
| Package | T-1 through-hole DIP |
| Drive Current | 20mA typical |
Built for
- RC police/emergency vehicles: Mount inside or on top of a Traxxas TRX-4, Axial SCX10, or Tamiya body shell for instant emergency lighting. No receiver channel needed, no controller board. Simpler and cheaper than MyTrickRC kits ($12–$25).
- Scale model police and fire scenes: HO scale police car top bars, checkpoint scenes, accident response dioramas. One LED per vehicle — no separate red and blue wiring. Evans Designs and Dioramo sell similar for scale models.
- Halloween and escape room props: “Lockdown” alarm effect, haunted house police scene, emergency corridor lighting. Red/blue strobing inside a prop dome creates instant atmosphere.
- Christmas village emergency vehicles: Miniature police car and ambulance accessories for Department 56 and Lemax layouts.
- Cosplay and props: Sci-fi alert panels, robot warning indicators, prop weapon charge-up effects.
Makeshift controller trick: Wire this red/blue LED in series with a standard LED, and the standard LED will blink in sync (though showing only its own color). Use multiple red/blue LEDs together for a light bar effect — slight timing drift between units adds realism.
Polarity matters — long lead is positive (anode). Add a current-limiting resistor matched to your supply voltage. Drop-in replacement for any standard 3mm LED — same footprint, no circuit changes.
Frequently Asked Questions
Complete your build
- Battery holders — AA, 9V, and coin cell for portable builds
- Switches — toggle, rocker, and mini slide
- Hook-up wire — 22–30 AWG for clean wiring
- LED Resistor Calculator — find the right resistor for your supply voltage
Sold individually (1 LED per quantity ordered).
More Information
| Size | 3mm Round Top Alternating Flashing LED |
|---|---|
| Color | Blue / Red |
| Animation Type | Flashing / Blinking Alternating 1.5hz |
| Luminosity/Brightness | 6,000-7,000 mcd |
| Forward Voltage | 2.9-3.1 |
| Current | 20mA |
| Wavelength | N/A |
| Viewing Angle | 20-30 Degrees |
| Mount Style | Through Hole (DIP) |
| Lens Color | Clear |
| LED Brightness Class | Super/Ultra/Extreme |
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