555 Multiple LED pulser

[JohnFrank78]

step by step , video 1, video2, video3,

[TheAdLab]

@JohnFrank78 You mean 1. choose the components 2. connect them together 3. solder? Everything you need is in the circuit diagram on my blog (including a component list). Follow the link above. If you need help reading the diagram leave a comment on the blog.

[JohnFrank78]

@TheAdLab tnaksn man, i can basic english, i learn little electronic, diagram its the importan, ok, lest go to built its, see you later

[tickyul]

No need for that big of capacitors.......1000uf at around 10-20 volts is a lot smaller than the ones in this video.

[EllinonEnosis]

LOL i dont know what you say but i kind of really liked the music :) (and the circuit ofcource)

[DarkBubb1e]

This may be just the circuit I'm looking for.  Thanks!

[pmlsantos]

Nice tutorial!

How easy is to do with for example 40 LEDs?

And what you use for connecting wires to the LEDS? Seems a protection.

[rodymoon]

Me podrias enviar el diagrama a mi correo??? moy_moreno_91@live.com

[cheezerboy]

could this be made with an LED strip on 12v?

[donjones24]

A new reliable line of LED dimmers and flashers at Digital lighting

[valiza123]

Why did you use big cap's. Is it not easyer to use "bigger" resistors? Would save alot of space.

[fastermaster22]

ohh yeeaaa i move the resistor from pin 1 to pin 7 to pin 2 to pin 7 and now it works

[TheAdLab]

@fastermaster22 Glad to hear it :-)

When I've handed in my thesis I'll update the schematic on the video. Right now I just can't spare the time I'm afraid, sorry.

[fastermaster22]

@TheAdLab naaa it's okey there's no problem

[pmlsantos]

@fastermaster22 You are my hero!! Thanks =)

[TheAdLab]

@fastermaster22 It took me a year but I've (finally) updated the schematic on the blog page.

[fastermaster22]

@TheAdLab That's great man I'm sure it's gonna be very helpfull for other people

And by the way I actually like the music in the video XP

[fastermaster22]

man i think i see the problem in your new schematic you got the 160k resistor in pin 1 to pin 7 and here in the video you got the resistor in pin 2 to pin 7 but well i don't know if that is the problem

[Creammy06]

@fastermaster22 You're right! I did the schematic for about 5+ times and it didn't work. It worked when I connected the 160k resistor to pin 2 and 7. Thank you so much! :)

[fastermaster22]

@Creammy06 you're welcome (:

[tickyul]

@Creammy06 Easist way to get an output you like is breadboard it with a pot between pin 2-7.....then set it for what you like......take resistance reading of pot....then select a fixed resistor that is close.

[fastermaster22]

hey dude mm i do this just as the schematic like 5 times but i can't do it.

i use 2 LED'S but just one lights on and it just stay like that

it don't fade...

can't you do the video step by step??

[TheAdLab]

@fastermaster22 Hey, There is a new, clearer schematic (with pin numbers and a colour scheme) that can be downloaded from my blog, the URL is in the video description above. Hope that helps.

[fastermaster22]

@TheAdLab yeah well the schematic in your blog is the one is use

[TheAdLab]

@fastermaster22 Hmm... Then I would suggest taking out the large capacitors and one of the leds. Try and just get one led blink. Have a look at the 555 AStable circuit on Wikipedia, that's the basis of this circuit. When that works add the other stuff...

Afraid I don't have time to make another video at the moment, I'm finishing off a big bit of research...

[fastermaster22]

@TheAdLab well I'll try thanks for your time and when you have time and when you want to do the video do it please thanks

[happygamestvfun1]

omfg i have same lappy as you!

[1dosucol1]

You really should lable the pin numbers on the 555,helps with fathoming out what goes to where.

[TheAdLab]

@1dosucol1: There's a new schematic (with pin numbers) if you follow the link at the end of the video. Haven't had time to integrate it into the video.

[1dosucol1]

You should number the chip,it does help when trying to read the schematic.

[syncmaster710n14]

I just Tryed this and all that happened was Led 2 just stayed on and Led did nothing. Any Idea's???

Thanks

Sam

[TheAdLab]

Sounds like your C1 might not be discharging, make sure it is correctly connected to ground.

Also try taking out C2 and C3 while debugging yout circuit, you'll see the LEDs switching on and off but not fading.

[syncmaster710n14]

I have gone over my circuit and found my r1 is not 8K2, and I don't have any 8K2 resistors.

Could I use a different resistance one instead.

Thanks

Sam

[TheAdLab]

R1, R2 and C1 define the frequency and shape (i.e. how long the wave is high compared to low) of the square wave coming out of the timer.

You can definately use a different resistor but if the value is very different to R1 (i.e. a few orders of magnitude) it may produce a square wave that switches too fast to be seen (which might be why your LED2 looks like it is staying on). Values close to 8K2 shouldn't make much difference though...

Btw the tmer is running in Astable mode...

[TheAdLab]

Hey, I just realised that C1 is actually an electrolytic capacitor with the negative leg connected to pin 1 of the 555 chip. Sorry about that...

[syncmaster710n14]

Thanks

I got i going in the end anyway.

[peterdbennett]

Nice one Ad - Is this the basis of a Bestival costume?

[TheAdLab]

It was the basis of a Shambala costume, think it may be the basis of many more...