40 lines
1.6 KiB
Markdown
40 lines
1.6 KiB
Markdown
---
|
|
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. |