I don't know is this a bug or something but PIR sensor in tinkerCAD is only working with 4.5V and 6V battery, where as transistor is only working with a 9V battery. When I tried implementing both of these, I am getting a situation where I have to use two different power sources. I tried regulating 9V to 5V using resistors voltage divider circuitry but the power is not enough. Please let me know a solution for this...!!