Hi
Which is the tiniest photo electric sensor I can use with MEGA 2560 please
The term "photoelectric sensor" is ambiguous.
What frequency (spectrum) of light (IR, visible, UV)?
Light dependent resistor? Photo transistor? Photo diode?
How fast the response?
Package (SMT, through hole)? Form factor?
Voltage range?
Like beam break detection around 5 feet range IR or UV but invisible
I got similar to these laser LEDs:
Amazon
Great range 100+ feet .
Just be careful of looking into the beam.
You can add lenses for beam control.
BTW
You can use them with an TSOP4838 IR receiver modulated at 38kHz.
This might be of interest:
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