---
title: "NightLight"
date: 2025-01-27
draft: false
description: "a description"
tags: ["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.