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Christmas lights question?

Is there anyway to set up 2 strands of christmas lights so that when one is on the other is off and then they switch every couple of seconds.?

7 Replies

rickharris (author)2011-11-28

Buy a low voltage relay that a 555 timer will switch (see 555 data sheet for max voltage, current.)

Build the 555 astable timer cct with a period of 2 seconds.

As the time turns the relay on and off so the relay triggers between the 2 light strings.

I am assuming the light are mains powered if they are low voltage - LEDs for example you could build an astable cct and drive them directly if you choose the transistors well.

kevman0044 (author)rickharris2011-11-28

I'm sorry I wasn't very specific. I'm wanting to do this with two strands of christmas lights. The kind that you plug into the wall not battery opperated so its not low voltage.

Re-design (author)kevman00442011-11-28

He means one that is contolled by low voltage but has 110 volt contacts.

rickharris (author)Re-design2011-11-29

Then go for the relay option. That's why I posted both approaches.

kevman0044 (author)rickharris2011-11-29

I understand now. I got it working. Thank you very much.

iceng (author)2011-11-28

Here is a simple circuit with R1=1K, R2=29K, C=100uF and
the Diode a 1N4001 about 2 seconds each.   .  .  .  A

Thermionic (author)2011-11-28

It can be done. You just need some kind of timer, or micro controller. Maybe get two timers, and sync their on/off periods?