Hi All,
I need some help on a circuit i am playing with... if i can get it working i can move on with a project i am working on.. i have setup the circuit described **broken link removed** (just knocked it up with visio) The part of the circuit in the box is one single unit with an ir diode and a photo sensitive transistor (i believe) facing each other, presumably when i put something between them it should open or close the circuit, i do not believe i have nay short circuits however when i power it up nothing happens, i tried turning up the voltage to 12v and the red diode went on but i could not get it to flash as i moved things passed the ir diode
does anyone have any idea what is going wrong here?