Summary of AVR LED Candle using ATtiny85 microcontroller
This project builds an LED candle that mimics a traditional candle without fire, using a high-brightness LED and ATtiny85 microcontroller; it uses an LDR and fixed resistor as a voltage divider to feed the ATtiny85 ADC for ambient-light sensing, sampling at intervals. It’s suited for props or locations unsafe for real candles.
Parts used in the AVR LED Candle:
- High-brightness LED
- ATtiny85 microcontroller
- Light Dependent Resistor (LDR)
- Fixed resistor (for voltage divider with LDR)
- Wiring/headers
- Power source (battery or appropriate supply)
- Resistor(s) for LED current limiting
- Enclosure or candle housing
This LED candle is built to mimic the look of a traditional candle without the dangers associated with an open flame. It uses high brightness LED and is controlled by ATtiny85. It could be useful as movie props where you cannot afford to have a candle go out during a take or in your home in places not suitable for traditional candles such as in a wall niche or alcove.
Pete made this candle with a Light Detecting Resistor ( LDR ) and a fixed resistor acting as a voltage divider. This is fed to one of the ATtiny85′s ADC inputs and sampled at discrete time intervals.
For more detail: AVR LED Candle using ATtiny85 microcontroller
- What does this LED candle use instead of a flame?
It uses a high-brightness LED to mimic a traditional candle without an open flame. - Which microcontroller controls the LED candle?
The ATtiny85 microcontroller controls the LED candle. - How does the project detect ambient light?
It uses a Light Dependent Resistor (LDR) and a fixed resistor as a voltage divider fed to an ATtiny85 ADC input. - How is the sensor data sampled?
The ATtiny85 samples the voltage divider input at discrete time intervals using its ADC. - Where is this LED candle particularly useful?
It is useful as movie props or in home locations not suitable for traditional candles such as wall niches or alcoves. - Does the project eliminate dangers of open flames?
Yes, it mimics a candle appearance without the dangers associated with an open flame. - Is a fixed resistor used in the circuit?
Yes, a fixed resistor is used with the LDR to form a voltage divider. - Does the ATtiny85 read the voltage divider directly?
Yes, the voltage divider output is fed to one of the ATtiny85 ADC inputs for reading.
