Can anyone design me a circuit?

Hey Guys, I'm back asking questions (yay). I was wondering if anyone could design me a circuit for 6 Blue Leds in parrelel running from a 9v battery with a 555 ic to blink them.

Thanks in advance.
-Prickly Potato

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iceng1 year ago

This will use less power then 6 parallel !

shahryar.adil.3 (author)  iceng1 year ago

Sorry I accidentally deleted all the comments. I was saying that "Yes please make the decision for me", oh and another thing the six LED's will be arranged in the shape of a smiley face.

Here are your circuit values.

It is best to change C1 (o..47 to 100 uF ) if you want to alter the timing currently set to about 1.1 sec.

If you are more adventuresome the Bowden calculator lets you change resistors and see the timing.


The o.01 uF is for stability and does not affect the blink rate.


This circuit by Michael Ringe uses a simply flip flop to charge two capacitors to the level required to flash a white or blue LED.
It can flash for several weeks on a single battery.
You can check if two of your LED's still flash sufficient when in parallel but it would be best to have once circuit per LED.

Did you consider a cheap heap or bicycle lamp?
They come with 3 or more white LED's and run on 3-4.5V, should be no problem to add a few more LED's to them and the battery pack uses little more space than a 9V block battery.

1.5V white blinker.jpg

Two transistors, some resistors and capacitors, no need for a 555 to blink some LED's ;)

OK .... You should draw it up, as I have not seen it in any of your ibles.

But first, I noticed you have ammonia experience, maybe you could help answer my question. https://www.instructables.com/answers/Can-someone-h...

kjsrocks1 year ago

Google is your friend!

rickharris1 year ago

Need more information:

Forward voltage


Blink rate.

You 9 volt battery is very current limited and won't run them for long, perhaps not at all.



The 555 astable (no stable state so it just keeps flip flopping back from on to off - in fact in my day was called a flip flop) is very common circuit above. You need to work out the R and C values for the blink rate you want.