Make Your Own Flashing LEDs, Part 1

[sidrah30]

please, could you modify this circuit by writting actual values of everything and buzzer doesn't works with adapter

[sidrah30]

please, could you tell me the actual value of Vcc used in the circuit and i tried this circuit in electronic workbench but the capacitor had no effect on the frequency of led. i did same process experimentally but that also doesn't works. please could you upload sucha video in which everyhing is explained and all the attachments are done on the camera. thanks

[marc1979Guitare]

What is the value of the DIODE??

thank yoU!

CYa! :)

[madamerotten]

It seems that the time constant for this circuit may be dependent solely on the bias currents at pins 2 and 6. These currents may not be consistent from one 555 to the next, so operation probably won't be consistent or even guarenteed. Also, the larger capacitors may cause a condition that exceeeds the safe current limit of the discharge pin (7). The time-proven and recommended way to make an oscillator with a 555 is with two resistors and two capacitors (one of them from pin 5 to ground).

[acmefixer1]

@madamerotten

I agree. Also, the CMOS 555 is not like a regular 555, it has no leakage, and will most likely not work in this circuit. This circuit is a bad choice for a neophyte experimenter to try to replicate. Use the circuit as it is shown in the datasheet for the 555. thanks.

[madamerotten]

@acmefixer1 That's a good point about the CMOS version. In fact, there are several versions of the 555 out there. The Wikipedia has a nice page on all this.

[noccy80]

The LED is a diode, so the diode is not really necessary, right?

[legoclockfreak710]

@noccy80 id say correct but im not 100% sure

[DJPaulgee1]

@noccy80 That's right. I don't know why he's used a diode in this circuit?? But you must certainly use a resistor in series with an led.  And i don't know what the use of a peizo buzzer in a strobe circuit is for??

[noccy80]

@DJPaulgee1 Correct, at least if you want the LED to survive for a longer period of time :-) The buzzer probably only makes sense if this is intended to be some kind of alarm system, i.e. indicating a warning condition such as high temperature etc where you would need both visual and aural indication. Besides that, it doesn't really fit the picture :-)

[joeincali]

u can hear that this guy is asian

[IowaCoffee]

I like the result, but resistors are not that difficult to code. If you can make this circuit then you can definitly look at a chart for the resistor value...

[acmefixer1]

@IowaCoffee

You don't have to read the resistor code. All you have to do is connect the resistor to the test leads of a cheap Digital MultiMeter set to ohms and read the value off the display.

[yoramstein]

FUNNY !

[haz939]

yeah I hate resistors too, measuring them with a multimeter in resistance setting its a good way to find its value.

[00HoZweMu00]

In minecraft it is easier.

[asv4k8]

I think I am going to attempt to make this tomorrow.... have you seen the hazard lights on the Ferrari 458 italia? the taillight led's strobe for 1 sec then are off for one sec... neat effect i am going to try on my car....

[ukraine49]

Why do u need the diode in that circuit? Doesnt seem like it would really be necessary there. OR is it to protect the IC from too high of a voltage ? 

[tersantotocantins]

show de bolla...........gostei muito...

[haloZforever]

number tree..?

[legokidnaruto]

why did you put a diode after the led??

[zzzSilveRFoXzzz]

you are hidding all the circuit.

(N) bad video

[KAPOWH4XZ]

i only watched this to see the pencil

[kirnikolaki]

Thanks, but I've already found out how to determine the poles - there's a grey line on the one side of the capacitor - it locates the negative wire (sometimes it's not a line, but ovals with rectangle in each one)

[kirnikolaki]

How do you determine the poles of the capacitor??? There is no + or - signs on my capacitor - it's just black with some values...

[chilliqueen2007]

@kirnikolaki If U tell me the code on the cap I'll be able to tell U the cap value.

[swedensy]

@kirnikolaki Capacitators that have polarity its polarity will be shown, but if polarity isnt shown that means is has no polarity. These are another 2 types of capacitators.

If im bad at explaining i can make video to show you actual parts.

[kirnikolaki]

@swedensy Thanks, I've seen different kinds of capacitors and some of them really don't have any symbols that show polarity . If you could make a video, I would be happy to watch it !! ;)

[swedensy]

@kirnikolaki sry i did not make video.

Go google for "capacitators codes" and see tables.

all numbers are in pikofarads, then the last number is mulitplier, if last nr is 3 its is multiplied by 1000

example 103 is 0.1µF

[mczoze1998]

@kirnikolaki the longer is positive the short one is negative

[futuresoldier7]

@Josh350 Theres appliances you can buy that do this, but who wants to buy one when you can make it right? Well they are called stroboscopes basically it picks up a sound and lights the diode according. Just look up stroboscopic schematics, I've seen a few just by googling and I made one that works fairly well.

[4471548nwn]

you can make it allot easier.. but its your project and its looks cool..

[Josh350]

Can you help me out? I'm trying to create a costume for this coming halloween. I'm going to be attending an event I attend every year. I would like for my LEDS to synchronize with the music that's going to be played. I'm just wondering what I need and how to do it. I'm no electronics expert but I'm eager to learn this looks really cool.

[burgerking220]

I dont get it weres the Input? and output sorry im new.

[sparkfishes]

Thanks for telling me about that some thing else to try - a hand around pin 5

I do mess about with HV stuff but am no expert . Thanks for looking at my stuff. I have just made a plasma speaker and some art bots with joule thiefs

[sparkfishes]

decoupling pin 5 with 0.01 cap makes the IC more stable - prevents lock up

But great idea and simpler than the normal way of doing it

Best wishes

[chilliqueen2007]

@sparkfishes Yes, that's true. #5 is the control pin. It is very sensitive to changes in cap and resistance values. There is a 555 circuit that takes advantage of this. By placing an LDR at #5, you can create some very cool sound effects by waving your hand over the LDR. BTW, I've been to your channel. You have some great videos. Is HV your specialty? I was absolutely stunned when I found out that you used the same method I did to find the pinout on a flyback. (By hooking it up to a live wire.)

[man13preet]

resistor msut be used....bcoz LED will burn out.....if ts rgb led then no prblm

[skyassasin16]

is this for real? no resistor before LED?

[alexkenworthy]

The resistor is to limit current, agreed? He's using the 555 to drive the LED, the 555 limits the current. Besides, when you get into strobing LED's their ratings mean very little

[Flea5000000000]

wohoo good man no resistors

[gonepishing]

i will be doing this tomorrow, picked up a 555 at radioshack yesterday....

I dont have a protoboard though =(

[TurtIedd]

I know this is 6 months later. LOL. But do you know what kind of 555 timer is used. TLC555 or LM555. Or is it just 555?

[gonepishing]

I have a couple normal 555's

Another decent chip is the 556, which you can make into a synth pretty eaisly

I now have 2 protoboards :D

[ingo1308]

hey, nice pencil!

[etharooni]

Great explanation!