Assistive Tech Hockey Goal Game

In support of the Campus School, I created an accessible hockey goal game. The game has an audio jack where a teacher can plug in a variety of buttons. When a student presses their button, the puck is dropped into the goal, where a goal horn plays and red lights light up. A continuous rotation servo and bluetooth connection between two Circuit Playground Bluefruits make this possible.

• Prusa Mini 3D Printer
• PLA 3D printing filament 
• Laser Cutter
• Miter Saw
• Band Saw
• Drill Press
• Nail Gun
• 2" Nails
• 21" x 10" of 1/8" Baltic Birch
• 52.5" x 6" of 3/4" Wood
• 2" x 29" of 1/2" Wood
• 3" x 5 3/4" of 3/8" Wood
• Pulley
• Tufting String
• Screws of various sizes
• Door hinges
• Wood glue
• Super Glue
• Hot Glue Gun
• Packing tape
• 2 Circuit Playground Bluefruits
• A continuous rotation servo (I used the FeeTech FS5103R) and the parts that come with it
• Adafruit NeoPixel LED Strip w/ Alligator Clips - 60 LED/m - 0.5 Meter Long - Black Flex
• 2 Adafruit Accessories 3xAAA Battery Holder w/ On/Off Switch
• 6 AAA batteries
• 2 Alligator Clips
• 3 Small Alligator Clip to Male Jumper Wire Bundle - 12 Pieces
• Portable Computer USB Speaker, Mini HD Audio Subwoofer Speaker with 3.5mm Audio Cable for PC Laptop Mobile Phone MP3
• 20mm Height Metal Caster Bearing Wheel
• Amazon Basics 3.5mm Male to Female Stereo Audio Extension Adapter Cable - 12 Feet

The first step is to cut the wood pieces. The side of the ramp is cut using the laser cutter. The illustrator file attached is what I used. The rest were cut using a mix of the miter saw, band saw, and drill press. The dimensions for the pieces are as follows:

• Back: 10.5" x 6" of 3/4" wood
• Top: 22.5" x 6" of 3/4" wood
• Bottom: 20" x 6" of 3/4" woof
• Side of rail: 2 pieces of 1.75" x 22" of 1/2" wood
• Front of rail: 2" x 7" of 1/2" wood
• Slide: 3" x 5 3/4" of 3/8" wood

Once all the pieces are cut, assemble them together. Put the back, bottom and top of the ramp that form the triangle together first using screws in the corners. From there, use wood glue to put the side of the ramp that does not have cuts in it into the triangle. Then add the two doors to the other side, using the door hinges. The door at the top of the ramp will have two hinges, one at the top and one at the bottom. The door at the end of the ramp will be hinged to the ramp above it, which although it is unconventional, is the easiest way to approach it. The walls of the ramp are then attached using the nail gun, inserting nails at various points.

Using the files attached, 3D print the 3 parts, which will be essential for the project.

To make the slide, take the wood you made for it, and screw in the 4 wheels in the bottom. Put a wheel in each corner. Then super glue the puck on to the top of it.

To set up the pulley system, we first need to set up the servo. Screw a servo blade of your choice into the servo. I prefer the 4 legged one. Then superglue the spool on to the blade. Once it's settled, also put a screw through the blade and spool to increase its strength. Measure out the length of the tufting string so that from where the servo will be it goes u through the hole and past the end of the board by an inch or two, just to give it some extra length. Then super glue the tufting string on to the spool. Next you need to super glue the servo into the stand. Find the spot where the spool is centered under the hole, and super glue the stand into place there. Now place the pulley at the top of the ramp, centered in front of the whole, and drill it into place. Finally, drill a hole in the back of the puck slide, insert the other end of the string into there, tie a not, and the pulley system is in place.

Download this code on to your two circuit playground bluefruits. If you've never used one, follow this video to learn how to. Place the servo code on to the bluefruit that will be controlling the servo, and the sound file and .wav on to the bluefruit that will control the lights and sound.

First we need to get the audio cable prepared for use. Cut the end of the audio cord that has the plug, not the jack. Strip the blue and green wires down. Put the blue wire on to a GND pin and the green into A3, and then insert a screw to keep them in place. Make sure the wire goes through the whole in the back of the ramp. Then using the alligator clip to male jumper wires, connect the black line on the servo to another GND pin, the red line to VOUT and the white to A1. For the audio CPB, attach the speaker to the board using the alligator clips, having the tip of the speaker go to AUDIO and the base go to GND. Then attach the neopixel strip, going through the hole on the side of the ramp, with black going to GND, red to VOUT and white to A1. Finally attach the neopixel strip to the end of the ramp using clear packing tape. At this point, all thats left is to attach the CPBs to the battery packs, turn them on, place the CPBs into the ramp, attach a button, and use the game!

Click the video to see what the final product should look like!