Flickering LED Tealight Candle

thingiverse

There are plenty of advanced candle-flicker LED projects available, but I was on the lookout for one with a few extra features: - A more realistic flickering effect based on a normal distribution of light intensities rather than uniform random numbers - A candle that responds to its surroundings - Something that fits perfectly in a standard Yankee Candle (R) tealight candle holder I created something unique using an ATTiny85, which generates a binomial distribution of random numbers and feeds them to a PWM output that controls the LED intensity. The LED I used is the Adafruit Sequin LED, compact and complete with its own resistor for ease of use. I added a light-sensitive resistor connected to one of the analog inputs of the MCU, triggering a change in the LED flickering when someone moves their hand over the object. As an added bonus, I connect the battery back (located in the base) to the electronics (in the cap) through some copper tape along the inside of the candle. This allows you to switch the thing on and off simply by twisting the top. I've made a video showcasing the final result in action and another one that compares how the LED candles behave compared to a real tealight candle.