My project is to make a circuit that is functional. I found one of the circuit on the internet. But its not work the way suppose to be! any one can help me?

I have the photos with me.
http://www.fileden.com/files/2007/12/13/1643355/20090603126.jpg
http://www.fileden.com/files/2007/12/13/1643355/20090603127.jpg
The link below is the circuit.
http://www.mrollins.com/flash4.html

 

My project is to make a circuit that is functional. I found one of the circuit on the internet. But its not work the way suppose to be! any one can help me?

I have the photos with me.
http://www.fileden.com/files/2007/12/13/1643355/20090603126.jpg
http://www.fileden.com/files/2007/12/13/1643355/20090603127.jpg
The link below is the circuit.
http://www.mrollins.com/flash4.html[/QUOTE]

Hello, Tiger, and welcome to the forum. The resolution on those pictures is outstanding. Do you have any pictures of pretty girls? Just kidding.

You seem to be having some trouble with your soldering. Does your project have to be soldered? If you are allowed to turn in a wire-wrapped project, I think that you probably would do better that way. Otherwise, I think that you need to work on your soldering technique.

Good luck with your project!

 

I agree with Mike Mandaville. It would be a good idea for you to do a bit of practice soldering. It looks like your soldering iron is not up to a suitable temperature.

hgmjr

 

Maybe the solder is plumber's solder without a flux core.
Maybe a blow torch is used instead of a soldering iron. A soldering gun?

The LEDs do not have a series current-limiting resistor so they are instantly fried if the battery is new.
But the 555 won't work anyway without its pin4 connected to the positive of the battery.

 

If you are just learning to solder, tin-lead solder is much easier to work with than lead free. It is hard to say what happened, but your joints are not good. That could be from no flux or too much heat. A 25 - 35 watt iron is usually enough for small work like that.

 

connect a wire from the pin 4 of the 555 to the (+)

 

Mike Quote

Hello, Tiger, and welcome to the forum. The resolution on those pictures is outstanding. Do you have any pictures of pretty girls? Just kidding.

KEKEKEKEKE

Yup buddy....u need to learn soldering first. That's how you begin in electronics.

Rifaa

 

Maybe the solder was dripped from too high.

 

connect a wire from the pin 4 of the 555 to the (+)