Switch-Active Arm for Painting/Writing

The switch-active arm robot is a tool that helps children with special needs to paint and write without needing to grip the pens and brushes. This robot has paint/ pencil holders of different sizes that move 180 degrees back and forth. Students can do their classroom crafts by pressing only the button.

1. SERVO Motor
2. 3D printed housing and arm
3. Jumper Wires
4. Arduino Board
5. Switch
6. 4 batteries
7. Battery housings
8. Tape
9. Glue
10. Laptop & Arduino Uno App

In Tinkercad or Autodesk Fusion 360, design the housing to fit your circuit board and servo, and cut holes for wiring the battery and the switch button. You can also use the attached STL files for direct printing. After that, download the Arduino software and the attached code and open it on your computer. You can also modify the code to increase or decrease the delay time.

Route the servo wires in one of the housing holes. With the striped color coding, jumper wires connect the red wire of the servo to 5V, the black wire to ground, and the white wire to pin 9 of the Arduino board.

Then, in the other housing hole, connect the power and ground of the battery to the power (3V) and ground of the Arduino Board.

To connect, the switch, strip the aux cord, and expose the wires. Connect the black wire to ground and the red wire to pin 7 of the Arduino Board.

Place the Arduino board securely in the housing and solder or tape the wires to avoid disconnection. Cover the housing with the lid and tape, and ensure the servo fits within its space. Secure the battery housing to the lid using either Velcro or tape. By using screws or a hot gun, place the robot arm on the head of the servo, and connect the aux receiver to the button.