This Instructable explains how to construct and modify a 5 Channel "Flame-less" LED Candle driver.
Our hackerspace "The Rabbit Hole"
is having a pumpkin carving night and we wanted to try something different to light the pumpkins. So I came up with this Flamless LED candle that uses an inexpensive IC and parts but simulates the random flickering of a candle.
When complete this circuit emulates the flicker of a candle including random "wind / draft" events of fast dim flickering. The 5 LEDs flicker at different rates and intensities allowing you to drive 5 individual candles with a course effect, one candle with a smoother effect, or any combination in between.
The first part of this Instructable goes over kit construction which are available from tymkrs.com at [add link to store here]. If you wish to build a unit from scratch all the design data is available at http://www.wire2wire.org/LED_candle/LED_candle.html
The second half of the Instructable goes over the circuit operation and firmware in greater detail.
Here is a video of the prototype circuit running on my bench.
And here is a demo of the final kit set up in a jack-o-lantern pumpkin.