Electronics > Beginners

1 NE555 timer and 1 LED circuit question

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Lucky-Luka:
Hi all
I've done a simple flashing LED circuit using a NE555 IC.
I've simulated it in LTspiceIV.
And no, I haven't got an oscilloscope.
It looks like that the LED takes two moments to flash to its full brightness.
This is the video I've done regarding my circuit: https://www.youtube.com/watch?v=-vjMvDEyco4&feature=youtu.be
I expected a crisp ON and OFF behaviour but it looks like it's not the case. Can anybody help me to understand what's going on?
Cheers

soldar:
I always put a 0.1 uF cap between pin 5 and gnd.

Audioguru:
When an old fashioned 555 switches its output then it draws 400mA for a moment (shoot through) that sags your battery for a moment.
Any other kind of power oscillator dont doo dat.

Lucky-Luka:
That's interesting.
Thanks
Cheers

p.s. is there a way to find all my threads or posts in this forum?

drescherjm:

--- Quote ---p.s. is there a way to find all my threads or posts in this forum?
--- End quote ---

Its in your profile.

Profile->summary

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