Place the breadboard in a position where its top is to your right side and the positive 9-volt red power is directly to your front. Place the transistor on the breadboard and spread the leads out. Insert the left lead of the transistor in a hole -- hole A -- on the breadboard, the middle lead two holes after the first, and the right two more holes afterward.
Connect the 100 ohm resistor between the right lead of the transistor and the positive 9-volt power supply rail. Connect one wire jumper to another hole -- hole Z -- and then connect the infrared light emitting diode from one hole, hole B, to another one at a considerable distant, hole C, with the longer positive lead in the hole B and the negative lead on hole C. Connect the other jumper wire from the breadboard to the blue negative power supply.
Connect the 220 carbon resistor between another hole, hole D, and the positive 9-volt power supply rail. Connect a wire jumper from another hole, hole E, to another hole, hole F, and another jumper wire from yet another hole, hole G, to another hole, hole H.
Connect the 1 kilo ohm resistor from a hole J to the negative blue rail and the 4.7 kilo ohm from a hole K to a hole L. Fix the electrolytic capacitor from a hole M to a hole N. Connect the 10 ohm resistor from a hole O to a hole P.
Insert the small electric pot, its stem pointing in away from your direction. Ensure the pot is inserted all the way to the surface of the breadboard. Fix the earphone plug cable appropriately on the breadboard using the pliers, and finally connect the 9-volt battery to a battery clip and to the power supply rails.