ECE 5725 Final Project: Autonomous Nerf Aiming System #### by Daniel Sachs & Divya Gupta ############################################################################## import time import cv2 import numpy as np import RPi.GPIO as GPIO import pigpio import sys import subprocess import pygame from pygame.locals import * import os from PIL import Image During the two months of evenings and weekends he spent working on the project over the summer, several design changes were made. “The biggest disappointment was that the huge chunky motors I had didn’t have enough torque to turn the bot successfully. Getting the right motors is an area where I am definitely still learning and it’s a critical factor to get right in building a successful bot.” elif ( not ( 5 in targets) and ( 5 in civilians) and x >cols_left[ 1] and x rows_up[ 1] and y

Nerf Guns of 2023 | Tested by GearLab The 5 Best Nerf Guns of 2023 | Tested by GearLab

If you've been browsing through my other instructables, you might have noticed that I am obsessed with Nerf guns. So far, I’ve managed to infect just about everyone around me with the Nerf virus. It is really fun to see how these plastic toys turn grown men into small boys! Continuing work on the project, David plans to power it with LiPo batteries – “It currently runs on 14 (!) AA batteries which really don’t last very long as the drive motors and flywheel motors are pretty greedy.”

Conclusion

attach diable plate momentary button to digital I/O pin 2 (low-active: when on, connects pin to GND) My main aim was for it to look awesome; which was difficult to achieve without removing the front part of the gun. But, I managed to accomplish this without removing the barrel, and I’m really happy with how it turned out!

Nerf | Argos

Several important lessons we learned over the course of this project and may be of use for future students are that the Haar cascades classifier and Local Binary Patterns Histogram algorithm were easy to implement in OpenCV and relatively accurate for our purposes. We were stumped at first by the camera lag before we learned about the five frame internal buffer on the capture function; our way of circumventing this issue by throwing away four frames so that we always use a current frame seemed to work well but may not be effective if a higher frame rate is necessary. Additionally, we found that using hardware PWM through the PiGPIO library greatly improved the stability of our servos compared to software PWM. David describes the robot’s public debut at the Cotswold Jam as ‘controlled chaos’. “It went down extremely well. I built some ‘evil alien’ targets to give the participants something to aim at – apart from each other!” void ceaseFire(int selector) { // function to stop firing the gun, based on what firing mode is selected In my opinion, a 5 kg spring works best (the original one is a two kilo spring). I tried a 7 kilo spring in one, and although it was strong, it resulted in a lot of mis-firing. Controlled manually using a wireless PS3 joypad, FRED-209 can fire multiple foam darts at the chosen target(s). Its twin motors are driven using a ZeroBorg board, while the firing servo is connected directly to the GPIO 18 PWM pin on the Raspberry Pi. A tilt mechanism for aiming is controlled by the joypad’s shoulder buttons.Change in panning servo's PWM duration depends on # difference between current x position and center boolean invertInputs; // TRUE turns on internal pull-ups, use if closed switch connects arduino pin to ground my_buttons = { 'New Target':( 70, 90), 'New Civilian':( 230, 90), 'Set Priorities':( 150, 135), 'Arm System':( 150, 180)} The first step in programming our system was to set up the system to capture a picture and detect where the faces are inside of the image. To do this, we used OpenCV, a popular open source library for computer vision which has many pre-trained classifiers for object detection, and referenced an example using face detection from TheCodacus.com (referenced below). We chose to use the Haar cascade classifier for face detection, using the provided haarcascade_frontalface_default.xml file from OpenCV. It only works on gray scale images, so after capturing each image we convert them to grayscale with OpenCV. Then we ran the classifier which returned the location of a bounding box around each face. During testing, we displayed the image with this box on our screen and found that this classifier worked reasonably well to detect faces when the person is looking directly into the camera. Facial Recognition - Collecting images Since 1982, PCMag has tested and rated thousands of products to help you make better buying decisions. Read our editorial mission & see how we test.

Nerf N-Strike Elite Terrascout Review | PCMag Nerf N-Strike Elite Terrascout Review | PCMag

The gun is mechanically very similar to the Nerf Rapidstrike rifle, using a motor to drive an air piston that launches each dart. It's a quieter and more reliable firing system than the flywheels used in guns like the Nerf Stryfe, which spins up a pair of wheels into which darts are fed by a lever connected to the trigger. The Terrascout can launch between two and three darts per second, sending them flying at a distance of about 50 feet. Step-02 Flywheel flinger The dart is pushed into twin rotating flywheels which propel it rapidly down the barrel. These, along with the robot’s drive motors, require a lot of battery power. I decided that the best way to attach the wooden pole would be through an existing screw hole. Since the gun should be attached in its center of gravity, I had to use counterweights later on (I didn't want to take the front of the gun off, since I thought it looked good). Otherwise the center of gravity interferes with the ammo belt. invertInputs = true; // TRUE turns on internal pull-ups, use if closed switch connects arduino pin to groundelif ( not ( 2 in targets) and ( 2 in civilians) and x >cols_left[ 1] and x rows_up[ 0] and y

NERF | Toys R Us Canada NERF | Toys R Us Canada

boolean useAmmoCounter = false; // if you want to use the shot counter / clip size feature, set this to true The gun on the Terrascout is a rapid-firing, motorized Nerf gun similar in design to the Rapidstrike, but shorter and built on a motorized mount rather than a gun grip. It accepts Nerf N-Strike magazines through a slot on its right side, and includes an 18-shot magazine and darts. The top of the gun holds a large handle with an N-Strike accessory rail on top, so you can both easily carry the tank and mount a light or other Nerf rail accessory on it. A second accessory rail sits under the barrel.xPosition = (100*(int(x100byte)-48)) + (10*(int(x010byte)-48)) + (int(x001byte)-48); // decode those message bytes into two 3-digit numbers That said, everything comes together to make the Terracout a really enjoyable toy. It has all the advantages of a surprisingly peppy remote control vehicle and a Nerf gun you can fire from across the room, all with a camera that lets you watch whatever you're aiming at. It's a fantastic spy and artillery device for anyone who wants to wage warfare against their siblings or coworkers. In this instructable, I will show you how to modify a Nerf Vulcan to automatically aim and fire at targets. As an added bonus, this gun won't fire at anyone wearing a shirt with the instructables robot on it. I had this project in mind for a long time and finally managed to find the time to bring it to life.