Magnetic sensor kit

I am having a problem building the magnetic generator circuit.
The 555 IC does not have a notch on either end.
How to determine which way to place the IC on the board?
Thanks, Gramps

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Hi @Gramps ,

Welcome back to our forum!

Could you take a photo of this IC from the top?

We found there is a DOT next to pin 1 on the top of the chip problem solved thank you

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Perfect :slight_smile: Have a nice day.