I need 8 break beam sensors but I just can't find any cheap ones so I decided I might as well make my own. I will have to use them for a coin detector, when the coin goes through, a voltage is sent to a pin of the Arduino.
I picked up some IR leds but I just don't know whether to pick IR receivers or IR photodiodes. The photodiodes seem more straight-forward but at the same time I am afraid of wrong readings because of visible light.
Meanwhile a IR receiver seems like the best option, light doesn't interfere with it and it's basically the same price.
Which one would you pick for this project?