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https://github.com/schnebeck/attiny85-whitelight-controller
Lidl™ LIVARNO™ LED Light Mod - Saving, Fading, Shining
https://github.com/schnebeck/attiny85-whitelight-controller
arduino attiny85 control ir lidl livarno mod modification platformio pwm remote save stettings store whitelight
Last synced: 8 days ago
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Lidl™ LIVARNO™ LED Light Mod - Saving, Fading, Shining
- Host: GitHub
- URL: https://github.com/schnebeck/attiny85-whitelight-controller
- Owner: schnebeck
- Created: 2025-01-01T14:10:22.000Z (about 1 month ago)
- Default Branch: main
- Last Pushed: 2025-01-25T21:44:58.000Z (9 days ago)
- Last Synced: 2025-01-25T22:37:44.470Z (9 days ago)
- Topics: arduino, attiny85, control, ir, lidl, livarno, mod, modification, platformio, pwm, remote, save, stettings, store, whitelight
- Language: C++
- Homepage:
- Size: 4.34 MB
- Stars: 1
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: ReadMe.md
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README
# LED Lighting Controller Modification
> ⚠️ WARNING - MAINS POWER SAFETY ⚠️
> ---------------------------------------
> Working with mains power is extremely dangerous and can result in serious injury, electric shock, or death.
> - **Disconnect all connections to mains power** before starting any work on this project.
> - This PCB does **not** provide galvanic isolation. Be aware that the low-voltage components connected to the circuit may be at mains potential.
> - Only proceed if you have adequate knowledge of electrical safety and experience working with mains-voltage systems.
> - Consider consulting a qualified electrician if in doubt.
>
> **Proceed at your own risk.**
This project aims to enhance the functionality of a lighting unit originally produced by Lidl™'s LIVARNO™ brand (Type 0452602). The original unit uses an unbranded 8-pin microcontroller for control, which does not retain its settings when mains power is switched off. This project replaces the original processor with an ATtiny™85 microcontroller to add persistent storage of settings and maintain compatibility with the original IR remote control.
## Features
- **IR Remote Control**: Full support for controlling the lighting unit via an NEC™ protocol-compatible IR remote control.
- **Independent Control**: Adjust cold white and warm white LED strings independently.
- **Brightness and Color Adjustment**:
- Smooth fading between color temperatures.
- Adjustable brightness levels.
- **Persistent Settings**:
- Store color and brightness settings in EEPROM.
- Reload saved settings after power cycling.
- **Night Mode**: Activate a low-intensity nightlight setting.
- **Preset Support**: Quickly switch between predefined color and brightness presets.
## Hardware Requirements
- **Microcontroller**: ATtiny85 running at 8 MHz with built-in EEPROM for setting storage.
- **LED Channels**:
- Cold white LED string connected to PB1 (PWM output).
- Warm white LED string connected to PB4 (PWM output).
- **IR Receiver**:
- NEC-compatible IR receiver connected to PB2.
## Pin Configuration
| Pin | Function | Usage |
|-----|----------|---------------------|
| 1 | PB5 | |
| 2 | PB3 | |
| 3 | OC1B | Warm white LED PWM |
| 4 | GND | 0V |
| 5 | PB0 | |
| 6 | OC1A | Cold white LED PWM |
| 7 | PB2 | IR receiver input |
| 8 | Vcc | +5V |
## Key Functionality
- **IR Commands**:
- Power toggle (on/off).
- Adjust brightness (increase/decrease).
- Change color temperature (colder/warmer white).
- Activate nightlight mode.
- Store and recall settings.
- Quickly set brightness levels (10%, 50%, 100%).
- **Fading**:
- Smooth transitions between brightness levels and color temperatures.
## Development Notes
- **Microcontroller Programming**:
- The ATtiny85 is programmed using an ISP programmer.
- **Development Board**:
- The project was developed using a Digispark ATtiny85 board for initial testing.
- **PWM Configuration**:
- Timer1 is used for generating PWM signals with 8-bit resolution.
## How It Works
1. **Startup**:
- The program initializes the ATtiny85, loads stored settings from EEPROM, and fades in the LED strings to the last saved state.
2. **IR Command Processing**:
- The IR receiver decodes commands from the remote control, which are processed to adjust brightness, color temperature, or mode.
3. **Persistent Storage**:
- Settings are stored in EEPROM to ensure they are retained after power loss.
4. **PWM Control**:
- Independent PWM signals are generated for the cold and warm white LED channels, enabling precise brightness control.
## Installation
1. **Programming**:
- Flash the provided program onto the ATtiny85 using an ISP programmer.
2. **Hardware Setup**:
- Replace the original microcontroller with the ATtiny85.
- It is recommended to mount the ATtiny85 upside down. This orientation aligns Pin 3 and Pin 4 with the existing PCB traces for better compatibility.
- Connect Vcc, the LED strings and IR receiver input to the appropriate pins as described in the **Pin Configuration** section.
3. **Testing**:
- Use the original IR remote control to verify functionality.
## Acknowledgments
This project enhances the LIVARNO™ LED lighting unit by adding modern functionality while maintaining compatibility with its original design. The ATtiny™85 microcontroller provides an efficient and reliable solution for embedded systems with limited resources.
## License
This project is open-source and available under the MIT License.