How to make IR on/off Switch for a simple Led

hi every1 i just want to that , how can i Cheaply able to make Infrared LED swich to control other LED's

i just want to make this experiment :

a door where when someone pass from it , lights an led (using IR led)


Thank you in advance

try this
Goodhart8 years ago
You need an IR LED emitter, and an IR LED receptor...Like these...