Instructables

Flashing L.E.D. using 555 Timer

I was trying to put in a video but it didn't work for me, so here is a link to YouTube http://www.youtube.com/watch?v=9rS9nFG8xdI
 
This is a detailed instruction showing how to build a flashing L.E.D. using 555 Timer.
There is no knowledge of electronics required in order to complete this project.
All the parts needed are listed, priced and links to them are also included. 

There are two sets of pictures, the top shows the progression of the project and the bottom shows each step individually.

This is my first instructable and it is also an assignment so please leave comments.
Thank you.




 
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Step 1: Parts List

Here you will find a list of all required parts, their pictures, prices and where to get them.
There is also an excel file attached.

1. Breadboard
2. 9v Battery
3. Battery clip
4. Jump Wires
5. 555 Timer
6. Capacitor 1μF
7. Resistor   1k Ohm            x 2 (brown, black, red)
8. Resistor    470k Ohm            (yellow, purple, yellow)
9. L.E.D.

Time needed to finish this project: 5 - 10 min.

All the above parts can be bought at http://radionics.rs-online.com/web/ next day delivery (Ireland).
neeraj56911 month ago

i do it on a general pcb but it doesn't work what should be the problem occuring there??

kdiv56503 months ago

I'm new to electronics, and I tried making this project, but the LED just stays on solid...I've ripped it apart and restarted 10 times now..what am I doing wrong?

shock1039 months ago
mine only flashes once when i remove and add the battery. please help.
colmw11 year ago
Thanks man, this helped me create something after trying to read schematics all day and nothing was working. I made something work and now I wanna learn more.
I created this circuit on a breadboard exactly as shown, but my 555 IC started heating up & the LED did not flash. What could be the issue?
Trilesto (author)  afkham_azeez1 year ago
Sorry for late respond, but if your IC is heating up it means that you have connected it the wrong way round that is + to -
very nice. I was looking for a simple schematic to make a flasher.
You can change R1 to change the frequency. 100K is fast and 900K is slow
f requency = 1440 / (R2+2R1)*C1 you can keep C1=1 and R2=1
R1 can also be replaced with a 500k variable resister
tomx632 years ago
nice job and very well done! great detail