3D Printed Robotic Hand

This 3D printed robotic hand can track my hand’s movements and move its fingers in the same manner. It is a very fun and interesting project to tackle.

Engineer

Medha P.

Area of Interest

Robotics

School

Mission San Jose High School

Grade

Incoming Sophomore

Click Here: My Code and Wiring GitHub

Demo Night!

This is my Demo Night video where I presented my project.

Third Milestone

My third milestone was getting all the flex sensors connected to servos and then building the hand. I put the hand together and then fed the fishing line through the palm and then fingers. I got a finger hooked up to the servo, but it then got fried because it was trying to move in the other direction. I also had difficulties with getting the flex sensors to respond to the servos. To fix the servo problems I changed my 9V battery to a 6V battery and also added a 5V voltage regulator. To fix the sensor problem, I re-soldered the sensor to the wire and also heat shrunk it to keep it from moving.

Second Milestone

My second milestone was getting a flex sensor to control a servo’s movement. This works by having the serial monitor read a voltage value from the flex sensor between 100 and 300. This value is then mapped between 0 and 180 to get a degree measure. The digital pin, which is connected to the servo, then instructs the servo to turn to that angle.

First Milestone

My first milestone was getting a flex sensor to print its voltage on the serial monitor. Flex sensors are resistors that change their resistance based on how much it is bent. The resistance of the flex sensor changes based on the angle it is bent at, which changes the voltage, so the serial monitor will print that value which tells it what position the sensor is at. I also added an additional LED so I could physically see the sensor’s bending affecting an object. As the sensor bends forward, the bulb dims and as it bends backwards it brightens.

My Starter Project

My Starter Project is the DIY Simon Says Game. This project was a kit made by Spark Fun with all the connections in the PCB board. The project contains a resistor, 4 Leds, 2 batteries, a buzzer, and 2 Capacitors. The project mainly required putting the parts in the right place and soldering the parts into place. An issue I had was that the device wouldn’t work unless the battery clips were held together. I fixed this problem by soldering the clips more and also pinching the clips inward to get a better grip on the battery. This project is a great starting point for soldering.