PlantCtrl/website/content/Hardware/1737993479095-NightLight/index.md

title, date, draft, description, tags

title	date	draft	description	tags
NightLight	2025-01-27	false	a description	nightlight

Nightlight Module

The system supports a dedicated light output module, which can be used to power a small LED strip for night lighting or growth support.

The module is based on the AP63200 synchronous buck converter. It provides an adjustable output voltage, allowing it to drive various types of LED strips or other low-voltage DC loads.

Configuration

The output voltage is adjustable via a potentiometer (RV1). This allows you to set the brightness or the correct operating voltage for your LED strip.

Formula

The reference voltage for the AP63200 is 0.8V. The output voltage is determined by the feedback divider:

• V_{OUT} = 0.8 \times (1 + \frac{R_{high}}{R5})
• R_{high} = R1 + RV1 + R3

Default values:

• R1 = 10k\Omega
• R3 = 1k\Omega
• R5 = 5k\Omega
• RV1 = 0\Omega to 50k\Omega (Potentiometer)

With these values, the output voltage is adjustable from approximately 1.76V to 9.76V.

Status LED

• I1 (White): Indicates that the light output is enabled.

Setup

{{< alert >}} Ensure the voltage is correctly set using RV1 before connecting a load for the first time! High voltages can damage LED strips. {{< /alert >}}

1. Power On: Enable the light output through the software interface.
2. Measure Voltage: Use a multimeter to measure the voltage at the output connector (LIGHT1).
3. Adjust RV1: Turn the potentiometer until you reach the desired voltage or brightness.
4. Connect Load: Once the voltage is set correctly, you can connect your LED strip.