For LED 2X2.5MM SUPER RED CLEAR 1.7V forward voltage, 25mA max current draw

@ 9v, need 330 Ohm resistor
@ 6v, need 180 Ohm resistor
@ 3v, need 56 Ohms resistor,

For LED 2X2.5MM SUPER YELLOW CLEAR, 2V forward voltage, 30mA max current draw

@ 9v, need 270 Ohm resistor
@ 6v, need 150 Ohm resistor
@ 3v, need 39 Ohms resistor,

For IR EMITTER 1.9MM 950NM DOME SMD,

@ 9v, need xx Ohm resistor
@ 6v, need xx Ohm resistor
@ 3v, need xx Ohms resistor,