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The layout could be mirrored. And perhaps there are more variants of the 555.
Yeah! Rockon! :)
But anyway, working perfect with arduino instead dead original IC. :D
Hi, well... there is your photo, pin GROUND is right, but here is photo original of 555 is left... I don't understand...I think is not 555 ...
Because these circuits depend on a 555 timer to enable the PWM. So the 555 may not have a nice logo or other markings on it. But it can not hide itself :) The other components are clearly no 555 timer. I'm 99% sure it is a kind of 555.
Hi, how did u know there IC is 555? I have one same like this, but there no show code of IC (not SMD)...
Arduino Highpower PWM (dimming) with Jtron PWM dc board
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