Introduction: LED BLINKER

Picture of LED BLINKER

this is an LED Blinker circuit, which is very simple to make and consists of very few components. ie an 8 ohm speaker, an LED and two 1.5 v batteries AA size. this circuit can be used in Christmas trees, the LED blinks according to sound, speaker acts as a mic here..... blinking varies with speakers


Sparkytastic (author)2011-12-14

I just tried making this circuit.
My LED remain ON all the time and would dim very slightly when I flicked the speaker with my finger. I tried a 4, 8, 16, and 64 ohm speaker, both in its suggested polarity and reversed polarity.
Did I miss something simple?

sooraj619 (author)Sparkytastic2011-12-14

Led will not completely turn off, it will dim slightly only

Sparkytastic (author)sooraj6192011-12-15

I noticed this from your images. However mine is fully on all the time.
I will do some more experimenting and see what I can find out :)

pro2xy (author)Sparkytastic2011-12-16

Maybe try a resistor in series?

Sparkytastic (author)pro2xy2011-12-16

I was thinking the exact same thing, but haven;t had a second to test it. Also the speaker I used that I thought was 8 ohm is actually a 16 ohm. THe manufacturer had printed the info very wierd.

pro2xy (author)Sparkytastic2011-12-17

hmmm... worth a try. Good Luck!!

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