• on Miscellaneous Electronics
  • Published in issue 1/2013 on page 110
About the article

Realistic LED Candle

With adjustable flame color and wind sensor

Realistic LED Candle
There are now many different types of LED candle simulators available. Before we begin to design a more realistic candle with a wind-noise detector and variable flame colour we need to check what a real flame looks like. To build this cozy, realistic lighting effect we used just a tiny microcontroller and a bi-color LED.
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Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor Members can exclusively download these files for free as part of their Membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service. Elektor recommends its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.

Components
Download the BOM list
The BOM (Bill of Materials) is the technically exhaustive listing of parts and other hardware items used to produce the working and tested prototype of any Elektor Labs project. The BOM file contains deeper information than the Component List published for the same project in Elektor Magazine. If required the BOM gets updated directly by our lab engineers. As a reader, you can download the list here.
Want to learn more about our BOM list? Read the BOM list article for extra information.
COMPONENT LIST
Controller Board
Resistor
R1 = 10kOhm
C3 = 100nF
C4 = 100µF
IC1 = 78L05
IC2 = Atmel ATtiny13-20PU, programmed, Elektor # 120489-41
K1,K2 = 5-pin pinheader, 0.1’’ pitch
K3 = 6-pin (2x3) pinheader, 0.1’’ pitch
PCB # 120489-1
LED Board
Resistors
R1 = 1MOhm
R2 = 820(
R3,R6 = 4.7kOhm
R4 = 220(
R5 = 10kOhm
Capacitors
C1,C2 = 100nF
Semiconductors
D1 = 1N4148
LD1 = bi-color LED, yellow/red
T1 = BC557
Miscellaneous
Mic1 = electret microphone capsule
S1,S2 = push button
K1,K2 = 5-pin pinheader
PCB # 120489-2

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