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LED Counter

LED Counter
You can make an attractive LED counter that has various frequencies with a few simple electronic components.

 
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Step 1Place the Flasher IC

Place the Flasher IC
Position the LM3909N IC about three rows of holes from the left side of the solderless breadboard assembly. Also, make sure one-half of the IC is above and one-half is below the central depression in the solderless breadboard assembly. Press down on the IC to force the pins into the holes. All of the pins should be checked for ones that are bent or folded up. If the pins do not make good contact with the solderless breadboard, the circuit may not work.
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9 comments
May 20, 2009. 1:25 AMLastDevil says:
Thank you mate, just what i needed to know on the cap's ;)
Feb 3, 2009. 4:20 PMNetReaper says:
how do you read this? do the circles mean anything
Jan 21, 2009. 3:43 PMNoPegs says:
Oof, the LM3909 was discontinued in early 1996. Stock has all but dried up by this point (I've seen them listed for upwards of $7 each.) 555s are cheaper even when you factor in the cost of the 2 or 3 extra resistors needed to perform the same function. And really, you don't need 3 single AAs in there. two of them will produce 3v and you can run all 3 555s off of it. Also, I, too, cry for the breadboards. That's like buying an ATV and parking it in the garage and never moving it. I do like the chassis design though. It makes up for the electronic shortcomings. 7 out of 10. :)
Dec 8, 2007. 7:04 PMfrank26080115 says:
what a waste of a breadboard, try soldering it, breadboards are precious, and a cheap iron costs about as much as a large breadboard anyways
Jan 22, 2008. 9:24 AMHAL 9000 says:
I agree, beardboards are for sketching circuits, Once you have it all firgured out you should solder it up and use the breadboard for another project. Also, my 25W soldering iron was about $9 at Radio Shack, and it works fine. Ill maybe make an instructable about making a soldering workstation, but soldering is incredibly easy. Good work though, i like this instructable!
Dec 19, 2007. 11:47 AMDavidRobertson says:
you can reuse breadboards though
Jan 22, 2008. 9:21 AMHAL 9000 says:
Wow, cool. I just might make this, im planning on getting a bunch of LEDs soon. Maybe you could wire in a bunch of switches to change the Capacitors.
Dec 15, 2007. 9:57 PMrchan928 says:
Hey J! good job on yours! I never got a chance to check your's out. Mines is lame since I got so many mean comments! LOL :) See you next semester? -Roger
Dec 9, 2007. 10:32 AMGorillazMiko says:
cool instructable i guess, but i have to agree with frank26whatevernumbersgohere, it is quite a waste of breadboard. i dont even have a lot! i have... lets see. NONE at the moment.

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