Animated pre-wired LEDs have a built-in IC that runs a lighting effect automatically from a 12V DC supply — no external controller, no resistor calculation, no additional components required. Connect the two leads to power and the LED performs its effect continuously. This category covers three distinct animation types in 3mm, 5mm, and 10mm DIP lens sizes, available in 9 colors each:
RGB Auto-Cycling Pre-Wired LEDs — a single LED that smoothly fades through red, green, blue, and blended colors in a continuous loop. Available in slow-cycle and fast-cycle speed variants.
Common applications include model railroad building interiors and signals, diorama fire and hazard effects, haunted house and escape room props, holiday and seasonal displays, and automotive accent lighting where a plug-and-play animated effect is needed without a microcontroller or timer circuit.
Important — DC power required: The built-in animation IC needs stable DC. If your source is a 12V AC landscape transformer or DCC model railroad track power, you must first convert to DC using a bridge rectifier, then add a 100 μF electrolytic capacitor in parallel with the LED to smooth the pulsed output. Without the capacitor the IC may reset between half-cycles and the animation will not run correctly. See the full AC/DCC wiring guide for circuit diagrams and step-by-step instructions.
Frequently Asked Questions
Flashing LEDs switch fully on and off at a fixed, regular rate — approximately 1 Hz (once per second). The result is a clean, predictable blink used for indicator lights, warning signals, and scale model emergency or hazard lights. Flickering/candle LEDs use a randomized algorithm in the IC to vary brightness irregularly, simulating the organic movement of a real flame. The randomness is key — the pattern never repeats, which is why candle-flicker LEDs look convincing in dioramas, miniature lanterns, fireplace scenes, and Halloween props.
Three types: (1) Flashing — regular ~1 Hz on/off blink, available in 3mm and 5mm. (2) Flickering/Candle — random flame-like intensity variation, available in 3mm, 5mm, and 10mm. (3) RGB Auto-Cycling — a single LED that fades through red, green, blue, and mixed colors in a continuous loop, offered in slow and fast speed variants.
Yes, with two additional components. Add a bridge rectifier to convert the AC output to DC, then connect a 100 μF electrolytic capacitor in parallel with the LED to smooth the pulsed DC. Without the capacitor the animation IC may reset between half-cycles and the LED will not animate correctly. See the full wiring guide for a complete circuit diagram.
Yes, with the same two components as above. DCC track power is AC (a bipolar square wave), so you need a bridge rectifier and a 100 μF capacitor before the LED. The result is indistinguishable from any other DC source — the LED performs its animation sequence reliably. The wiring guide includes DCC-specific diagrams.
No — the IC is fixed at the factory and cannot be adjusted. The flash rate (approximately 1 Hz) and the flicker pattern are set in hardware. The RGB auto-cycling speed is chosen at purchase: slow-cycle and fast-cycle variants are sold as separate products. For a fully controllable flash rate you would need a standard component LED and an external timer such as a 555 timer circuit, but that requires additional components and wiring.
The number is the diameter of the LED lens. 5mm is the most popular — available in all three animation types (flashing, flickering, and RGB), bright, and compatible with standard LED bezels and panel-mounting clips. 3mm fits tight spaces, narrow-gauge model railroad scales, and miniature dioramas where a smaller footprint matters. 10mm is available only in the flickering/candle effect and gives a larger visible flame area — good for larger dioramas, full-size prop lanterns, and Halloween displays where the effect needs to be visible from several feet away.
