a timer to control LED candles??????

Video Freak · 18th May 2008, 10:59 PM

Hello all, I have a question. I have lots of LED candles and the large ones( the 8" column candles) have a timer in them. basically I turn the switch on the bottom to on at say 5 pm, they run for 6 hrs and then automatically turn off and then the next day they turn on at 5pm and repeat the cycle.( I. E I never have to tuun them on or off manually again) Now for my other smaller column candles they do not have a timer. So, what I wanted to know is their a way to add one with something similar to a 555 timer chip but it acts like the timer I described above? Smaller is best for the size of this, so I didn't know if their is a just a 1 off type chip that could work or do I need a mini circuit? The candles use 2 AA batteries for 1 amber led that flickers and thats it. Thanks for any further insight into this.

AndrewT · 19th May 2008, 10:16 AM

The 555 is good at short timer intervals, but poor at long timings.
Look for some "counter" type timers that can work for very long timings.

Nordic · 19th May 2008, 11:27 AM

I guess a "simple" PIC could be programmed... but it is not a biginners project...

18th May 2008, 10:59 PM	#1
Video Freak diyAudio Member Join Date: Mar 2003 Location: cold Cold north	a timer to control LED candles?????? Hello all, I have a question. I have lots of LED candles and the large ones( the 8" column candles) have a timer in them. basically I turn the switch on the bottom to on at say 5 pm, they run for 6 hrs and then automatically turn off and then the next day they turn on at 5pm and repeat the cycle.( I. E I never have to tuun them on or off manually again) Now for my other smaller column candles they do not have a timer. So, what I wanted to know is their a way to add one with something similar to a 555 timer chip but it acts like the timer I described above? Smaller is best for the size of this, so I didn't know if their is a just a 1 off type chip that could work or do I need a mini circuit? The candles use 2 AA batteries for 1 amber led that flickers and thats it. Thanks for any further insight into this.

19th May 2008, 10:16 AM	#2
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	The 555 is good at short timer intervals, but poor at long timings. Look for some "counter" type timers that can work for very long timings. __________________ regards Andrew T.

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19th May 2008, 11:27 AM	#3
Nordic diyAudio Member Join Date: Sep 2005	I guess a "simple" PIC could be programmed... but it is not a biginners project...

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