make sure that the pins don’t touch each other, otherwise, Arduino could be damaged. Find a stick at your home and attach the circuit comprising of Arduino and RF receiver on it. You can use Hot glue ...

The following is excerpted from the book Arduino Project Handbook ... Attach a laser diode to the top of the module; I recommend using a glue gun for a permanent fixture, but you can use tape ...

They don't make light guns that work with LCD screens, so I'm making my own using an Arduino pro micro, a gyroscope, an accelerometer, an encoder, a mini-joystick, some geometry and physics math. So ...