Curtain Light Calculator

How many ports and watts does a curtain need?

Enter the curtain size, drop and bead spacing, linked curtains and controller ports to get total LEDs, refresh rate per port and power-supply rating — plus the best series/parallel layout. Fully parallel is preferred for curtains.

Choose a part

Series

Part

★ = fully parallel capable (preferred for curtains)

Curtain size

Width (m)

Height (m)

Drop spacing (cm)

Bead spacing (cm)

Linked curtains

Number of curtains

Link cable (m)

Controller

Output ports each port is an independent circuit; ports refresh in parallel

Ports (custom)

Max current per port (A) 0 = skip

Lead length (controller to curtain, m)

Structure

Series groups S

Main-line feed point

Power supply

Voltage (V)

PSU rated current (A) 0 = use recommended

Wire: top main line + hanging drops

Top main line includes the controller lead and link cables; carries the whole port current — use thicker wire

Hanging drop wire each drop carries only its own beads’ current — thinner wire or PVC flat wire is fine

Content and refresh rate

Minimum refresh rate (Hz, 0 = none) ≥ 25 Hz recommended for smooth animation

Recommended Configuration

Curtain Configuration

Layout

Recommended layouts	Ports	Details (click to apply)

Item	Value	Notes

Engineering estimate: the curtain is modelled as a top main line with evenly spaced drops; copper at 20 °C, constant-current beads, each drop fed from the main line at one end; in series-parallel each group is a whole number of drops with diagonal feed. Controller ports are independent circuits that refresh simultaneously; refresh rate comes from each model’s data rate. Wi-Fi only carries commands and patterns from the phone app — per-bead effects are rendered locally by the controller and sent over the two-wire carrier, so refresh rate depends on LEDs per port, not Wi-Fi bandwidth. PSU recommendations keep full-white load ≤ 80%. Use the official datasheet and measurements for production designs.