Build an LED candle that flickers

candlebattery.jpg

This LED candle runs from a PIC 12F675 and is powered by 4 AA batteries to make up a 6 volt power supply with a 1N4148 diode that has a 1 volt voltage drop to turn it into the 5 volts that the PIC requires. The LEDs used were 15,000mcd to make the "flame" very bright. Check out the parts list and circuit diagram at the link below.

LED Candle via Electronics Lab


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Comments

Oldest comments listed first.

Posted by: The Oracle on September 24, 2008 at 5:18 AM

I just want to point out the mcd rating is light per unit area at a certain distance. So taking the same LED and focusing it more can drastically increase the mcd rating. This is why "superbright" LEDs have such a narrow viewing angle.

The LEDs on this project look like they have a translucent package so they'd be very diffuse (which is what you'd want for this project). But how can it have such a high mcd rating?


Posted by: Jetlag on September 24, 2008 at 9:22 AM

Just in time for Christmas

Just in time for Christmas
and lesser holidays!


Posted by: The Oracle on September 24, 2008 at 10:32 AM

@Phil - come on, that last comment was very offensive to a lot of people.


Posted by: Volkemon on September 24, 2008 at 3:43 PM

Yo to The O:

As a confirmed comments crawler, I am familiar with your "on probation" status.

But I do agree. That is an incredibly insulting comment. Maybe honest and sincere from the writer, but having no merit here.

also... '@PT' is preferable to '@Phil'- often diminutive forms of a person's name irritate them on a basic level, especially when they always seem to use their full name. Jes sayin...


Posted by: The Oracle on September 24, 2008 at 6:57 PM

@volkemon - I have never meant any offense to Phillip by saying @Phil. If he ever took it in any condescending way I very sincerely apologize and I hope he will reply and clarify.

As far as the on probation status, it's easy enough to use a different name, I don't even have an account, and I log in from so many different place (and have dynamic IP's), that I doubt it's really possible to block someone.

I am behaving and continuing to post under "The Oracle" rather than hiding under a new alias out of genuine respect for PT, not fear of the probation.

As for the original topic, I've never insulted anybody's race or culture, and that comment is way over the line.


Posted by: Jetlag on September 25, 2008 at 9:20 AM

Oh wow, I completely apologize for duplicating the first line in the title. I don't comment a lot and didn't realize how annoying that would be. Please don't take offense; I'll try not to do it again.


Posted by: Joe on October 3, 2008 at 3:52 AM

Need a LED fading curcit

Is it possible to make a cheap circuit to fade between 3 leds

?


Thanks
Joe


Posted by: Alex on October 11, 2008 at 9:28 AM

HEX file?


I've tried twice today to email the author (without success), is there any chance of anyone posting the (compiled) HEX file? The source is there on his site, but for a beginner like me it's a bit complicated compiling it.


Posted by: Anonymous on October 13, 2008 at 4:36 PM

I've had a reply from the author, he says he will email the HEX file to me. I guess it's worth emailing and asking for the file if you need it. I would post it here, but I'm not sure that would be fair or proper.

Alex.


Posted by: Alex on October 14, 2008 at 5:07 PM

HEX file - success!

After some reading and installing of compilers, I got the code to compile using mikroC and it works well. I did not need to take-up the author's offer to send his HEX file to me.


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