So I have a foosball table and want the score keeping to be electronic. I’ve figured out the screen and for the sensing of each goal Im using an Infrared LED transmitter and receiver set I got for Radio Shack. I have them set up so 6v goes through a 1k resistor to each infrared led (ones a transmitter one a receiver). I then have a led to ground in series with the receiver. But for some reason it doesn’t work, the led should go off when I place my hand between the 2 but it doesn’t. It always stays on. If you are a visual person my schematic is like the one on this website; http://atifsheikh.wordpress.com/2011/07/31/infraredir-transmittertx-and-receiverrx/ .