Hello, what component should I use to create a light barrier? Actually, the method doesn't have to base on light, it is just the name - the task is to check if something is between the sender and the receiver? Additionally, I'd prefer to only have to use one component each, that means to use the …

What to use for a Light Barrier ?

system October 5, 2012, 8:52pm 2

How large of a gap do you want between the sender and reciever?

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