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View Full Version : Pulse LED using 555 timer



Thaxos
09-10-2009, 04:54 AM
Well, cardcollector posted he was trying to work on this, and he had problems with it, so I decided I'd go out and grab the components and put it together.
Tonight (after college and work) I'll snap some photos, take a vid and write out a step by step guide for you guys.
Stay tuned.

EDIT:
Pics and video (And yes I did call it a 33 000 W resistor twice... I meant ohms, watts would be ridiculous!)
Video still uploading, will link later tonight.
PICS:
http://i322.photobucket.com/albums/nn414/Thaxos/Pulse%20LED/PIC_0173.jpg
http://i322.photobucket.com/albums/nn414/Thaxos/Pulse%20LED/PIC_0174.jpg
http://i322.photobucket.com/albums/nn414/Thaxos/Pulse%20LED/PIC_0175.jpg
http://i322.photobucket.com/albums/nn414/Thaxos/Pulse%20LED/PIC_0176.jpg
EDIT 2:
VIDEO!
Pulse 555 Timer Video (http://www.youtube.com/watch?v=tQQp8_WPcmo)

Kal El Rah
09-10-2009, 05:23 AM
Can't wait to see your results Bro.:cool:

cardcollector
09-10-2009, 05:58 AM
Awesome Thax, Thanks a lot!!

Thaxos
09-12-2009, 03:28 PM
Awesome Thax, Thanks a lot!!

No problem! Hope it works out for you! Waiting on your latest PM by the way...

Jedi Haluna
11-30-2009, 03:17 PM
Good evening,

I am a novice in this area, but this lighting system greatly interested

Can you give me read the exact components, and a wiring diagram.

I'd be greatly appreciative.

Thank you


************************************************** ***

Bonsoir,

Je suis novice en la matière, mais ce système d'éclairage m'intéresse grandement

Pouvez vous me donne la lise exact des composants, ainsi qu'un schema de câblage .

Je vous en serais grandement reconnaissant.Merci

Sunrider
11-30-2009, 05:58 PM
The CD4060BC is better IMHO, smaller, uses less power, more possibilities more LEDs:). I'm currenly completing 10 LED SMT setup. I'll post some info if requested.

Matt Thorn
12-02-2009, 04:27 AM
The CD4060BC is better IMHO, smaller, uses less power, more possibilities more LEDs:). I'm currenly completing 10 LED SMT setup. I'll post some info if requested.
Requested! A wiring diagram would for this kind of basic pulsing, and a brief description of some of the other possibilities would be greatly appreciated.

astromech_kuhns
12-03-2009, 12:43 AM
nice. we actually just did a circuit involving a 555 timer yesterday in electronics. same thing except we went ahead and attached two LED's in there and made them switch between one another. than me being in robotics and electronics stuff, i took the extra time waiting for others to add a switch to switch between the two, and a switch knob to control the brightness and the switching between the two.

Matt Thorn
12-03-2009, 01:07 AM
nice. we actually just did a circuit involving a 555 timer yesterday in electronics. same thing except we went ahead and attached two LED's in there and made them switch between one another. than me being in robotics and electronics stuff, i took the extra time waiting for others to add a switch to switch between the two, and a switch knob to control the brightness and the switching between the two.
Whoa. It sounds like you did exactly what I'm trying to do. But with high-power LEDs rather than accent LEDs. A customer wants me to make him a double saber, with one blade red and one blade blue, and him wants them to reverse colors on clash! I've been struggling to do this with Arduino, but I feel like that's overkill. (Or, rather, it's killing me.)

I found a wiring diagram for using a 555 to switch two LEDs on and off alternately, train-crossing-light-style, but I couldn't quite make sense of it, and couldn't locate the person who made it.

I plan to use two LedEngin RGBs, and have ordered a clash sensor from Tim (because I'm not sure if one from a cheap Hasbro toy will do). I would be so grateful for a breadboard mock-up showing me how I could do this (I know I'd need transistors to boost the amperage), I would send you a bottle of fine saké from Japan in thanks. :D

Here's the hilt I've made, BTW. As you can tell, it's made from two Yoda's. The guy is seriously into blue and red, the more symmetrical the better. I've had this beautiful hilt sitting here for months waiting to get some guts. :rolleyes:
http://lh6.ggpht.com/_THBqz9vPciU/SnT8RC_5UsI/AAAAAAAABeY/NnYH7rzOoM0/s400/IMG_0814.JPG (http://picasaweb.google.co.jp/lh/photo/Kvmiq74OAY-x0EDa11hSPw?feat=embedwebsite)
http://lh3.ggpht.com/_THBqz9vPciU/SnT8RmakwYI/AAAAAAAABec/Y4EEVGG_988/s400/IMG_0815.JPG (http://picasaweb.google.co.jp/lh/photo/iTz1zftKAzC2bNnIoJX25w?feat=embedwebsite)

astromech_kuhns
12-08-2009, 01:16 AM
WOW. um, i took two red LED's and set them on the same circuit and gave them a different return path i think is what it was, and then when putting them on a switch, i was able to make them blink or stay on, and the knob i used would make one be brighter than the other while the other would go dimmer, not quite off, just very dim.

so let me get this correct, you are wanting to take a rebel RGB and have one side blue and the other red, then, once the clash happens you want them to switch sides of color, so the one that was once blue is now red and the other way around?

i could go back to school tomorrow, when im there, with my camera and if i have extra time i will look into this for you as well as upload a picture of the circuit that we used and put it on a bread board and work to create the circuit again and see what i can come up with.

will work to help!

Matt Thorn
12-08-2009, 02:19 AM
WOW. um, i took two red LED's and set them on the same circuit and gave them a different return path i think is what it was, and then when putting them on a switch, i was able to make them blink or stay on, and the knob i used would make one be brighter than the other while the other would go dimmer, not quite off, just very dim.
Hmm. Well, that went over my head. :confused:


so let me get this correct, you are wanting to take a rebel RGB and have one side blue and the other red, then, once the clash happens you want them to switch sides of color, so the one that was once blue is now red and the other way around?
It's a double saber, Darth Maul style, so I am using two LedEngin RGBAs. When one is red, the other should be blue. On clash (the clash sensor being a kind of momentary OFF-(ON) switch), I need both LEDs to switch colors, so that the one that was red becomes blue, and the one that was blue becomes red. It may be easier to visualize if you think of it as four LEDs (two red, two blue--the green and amber will not be used). At all times, two are on and two are off. The 555 timer will (I'm hoping) reverse the on-off state of all four. I hope that makes sense.


i could go back to school tomorrow, when im there, with my camera and if i have extra time i will look into this for you as well as upload a picture of the circuit that we used and put it on a bread board and work to create the circuit again and see what i can come up with.

will work to help!
I would be eternally grateful if you could do that for me, and maybe make a simple wiring diagram. Thanks in advance!

Jagahati
12-10-2009, 09:15 PM
I have one of these working for a 7.2v system if anyone is interested in resistor values and such for that voltage i can post those details.

Matt Thorn
12-10-2009, 09:23 PM
I have one of these working for a 7.2v system if anyone is interested in resistor values and such for that voltage i can post those details.
Yes, please do. Two Li-Ion 14500s has recently become my setup of choice. Thanks.

Sunrider
12-11-2009, 05:55 AM
To do what It sounds like you want to do all you need is a relay on the leds you want to switch. One set terminals for normal operation & the on set for circuit being flashed.;)

Jagahati
12-11-2009, 09:38 AM
Ok here is the schematic that is posted on instructables by "PCMOFO".

http://i597.photobucket.com/albums/tt51/Jagahati/F4J70N0FRAAPMYYMEDIUM.jpg

Ok there are a few significant changes from the diagram.

First I am using an "Ultra Bright" LED not 4 "Super Brights".

Second I am using a 7.2V source NOT a 9v source

Thirdly in place of the 500 ohm resistor I am using a 100 ohm resistor. This resistor is there to insure you don't fry the LED. Use your meter and test the voltage coming across this point to decide what value of resistor you need to protect your LED of choice.

Lastly in place of the 100k ohm resistor I am using a 22k ohm resistor. This is because of the difference in the load from the 4 super bright LED's to my one ultra bright and the difference in voltage from the original design. This is the resistor to "fiddle with" if you want a slower or faster flash rate. a value between 10k and 100k should give you very different results in output .

Hope this helps somebody.

Matt Thorn
12-11-2009, 09:46 AM
To do what It sounds like you want to do all you need is a relay on the leds you want to switch. One set terminals for normal operation & the on set for circuit being flashed.;)
Sorry, Sunrider, I don't follow you. :(

Ok here is the schematic that is posted on instructables by "PCMOFO".



Ok there are a few significant changes from the diagram.

First I am using an "Ultra Bright" LED not 4 "Super Brights".

Second I am using a 7.2V source NOT a 9v source

Thirdly in place of the 500 ohm resistor I am using a 100 ohm resistor. This resistor is there to insure you don't fry the LED. Use your meter and test the voltage coming across this point to decide what value of resistor you need to protect your LED of choice.

Lastly in place of the 100k ohm resistor I am using a 22k ohm resistor. This is because of the difference in the load from the 4 super bright LED's to my one ultra bright and the difference in voltage from the original design. This is the resistor to "fiddle with" if you want a slower or faster flash rate. a value between 10k and 100k should give you very different results in output .

Hope this helps somebody.
It definitely helps. Thanks a million!

Jagahati
12-12-2009, 12:34 AM
Here is a short low quality rather horribly done video. But it should be adequate to show the slow fade on and off effect that I was able to get this circuit to do.

http://i597.photobucket.com/albums/tt51/Jagahati/th_Video0005.jpg (http://s597.photobucket.com/albums/tt51/Jagahati/?action=view&current=Video0005.flv)

Matt Thorn
12-12-2009, 12:50 AM
Here is a short low quality rather horribly done video. But it should be adequate to show the slow fade on and off effect that I was able to get this circuit to do.

That is sweet. What are the specs (mA, forward voltage, mcd) of the LED you used?

Jagahati
12-12-2009, 01:16 AM
Here you are. But for the most part I use these LED interchangeably with a few others. But this is a dang good guess.

Technical Specifications from Datasheet:
Intensity max (typ.) : 5000mcd (3200 mcd)
Viewing Angle: 20°
Wavelength (peak): 470nm
Forward Voltage: 3,5V
LED Current (If): 20mA
Housing: waterclear
Material: GaN/SiC
Operating Temperature: -40°C - 80°C