This item is the source code for the Nerf Gun project. By downloading this code you will be able to program your own PIC chip for this project. There is no cost for this item! Add it to your cart and checkout, if asked for a payment method select credit card but since the value of the cart will be $0.00 you will not need to provide a credit card number. You will be provided with a download link when the checkout process is complete. The file will also be available in your order history for one week after the order is made. To see your order history click on the My Account link in the menu in the top right of the site.