This remote control jammer circuit is basically the same circuit as a LED flasher, except that the timing capacitor is much smaller – .001 uF – so it flashes at a much higher frequency, around 38,000 times a second. The 9V battery is expensive; instead save money. Change the two IR LEDs from series to parallel and change the battery to four AAA cells in series. Remove the second IR LED from its existing place and add another 220 ohm resistor to it. Then connect these across the existing IR LED and 220 ohm resistor. Both 220 ohm resistors can be reduced to 150 ohms to get more current through the IR LEDs.