555 Timer Circuit

[sala]

HI,
I tried routing my circuit different ways, but I can't get the LED to come on.
Could someone please enlighten me as to what I am doing wrong?
Thank you!

 

[magnatro]

try this circuit:
https://www.circuitstoday.com/wp-content/uploads/2009/09/555-astable-multivibrator.jpg

 

[Hero999]

Please post a schematic.

It looks like the one above but we need to know all the component values.

 

[sala]

The schematic I used in in Pic 132

Thanks,
Sala

 

[ericgibbs]

The schematic I used in in Pic 132

Thanks,
Sala

hi sala,
The astable is running at about 1kHz, the LED is drawing an average current of about 5mA.
It maybe too fast and dull to see.
As a test increase the 0.1uF to say 1uF or 10uF.

 

[sala]

Thanks again for all your inputs.
I used the circuit provided by Magnatro.
Ra=Rb=10 kOhm
C1=C2 = 100microFarad
I have a one way diode: 1N914-1N4148
and a 555 timer
The LED is connected to a 470 Ohm resistor
I still can't see the blinking LED, I have uploaded the new circuit.
Please see below.
Thanks,
Sala

 

[audioguru]

I always laugh when I see a messy tangle of wires all with the same colour on a breadboard.

 

[Hero999]

Sorry, I see you have posted a schematic, I didn't see it beore.

Yes, that will work but, as Mr Gibbs said, the frequency is too high and needs reducing so you can see the flashing.

 

[Reloadron]

Maybe it is just me but in one image it looks like you are using a battery to power things. Now if that is true and the battery is in fact a 6 volt lantern battery it looks like the center connector which I think should be (+) you are using as common and the (-) outer terminal looks to be what you are using as positive? Are you sure you have your power polarity correct?

<EDIT> My bad as the corner is the (+). </EDIT>

Ron

 

[sala]

Yes,
I am using the right polarity.
i bumped the capacitor to 100 microfarad versus .01 as shown in the picture.
I still am not seeing the blinking light.

Does anyone have an image of a working circuit, not the schematic but the actual build that I can comparre mine with?

Thanks,
Sala

 

[ericgibbs]

hi sala.
I have checked the photo of your project board, the 555 is not wired up correctly.
How are you counting the pins of the 555.???

The little dot is pin 1.

 

[k7elp60]

Looking at the last picture you posted I see some errors.
Pin 4 is connected with a wire to row 34, it needs to be connected to pin 8
Pin 2 is connected with a wire to row 35 on bottom of board, it needs to be connected to pin 6 and the capacitor
10K from pin is connected to row 35 on the top of the board, it needs to be connected to row 35 on the bottom of the board.
If the LED still doesn't blink then reverse the leads of the LED, at it is polarity sensitive.

 

[tronixstuff]

555 timer

HI,
I tried routing my circuit different ways, but I can't get the LED to come on.
Could someone please enlighten me as to what I am doing wrong?
Thank you!

I got bored and wrote up a rough info post about the 555, perhaps you will find this useful:
**broken link removed**