engineering applications

project breif

skill development

we ar going to learn things to do semester 2 projec

independence

mrs white is helping is to chose a project this year

robotic arm

our robotic arm helps us build skills we need to do the project for the nex semester

Research :

Robotic claw base

Today we started on our robotic claw hand and the task I was given was to create a base which moves in a 180 degrees motion. A challenge I faced was calibrating the turns.

robotic arm claw

In class we built the top piece to our claw which opens and closes. We used one servo and two wood pieces with gears at the end so that they could both move.

Cardboard claw

Today on the first day of class we started the design process for the prototype of our first project we were given the task to build a robotic claw made out of carboard using Arduinos and servos

left servo arm motion

This video shows my left servo arm I had to calibrate it to rotate in the opposite direction than the right servo arm.

right servo arm motion

This video shows the motion of my base piece my right arm servo and claw. I focused on calibrating my right arm to do a 90 degree turn.

short and long arm calbration

Today in class I worked on getting both of my arms moving in their correct direction. A challenge I had doing this was the coding aspect I struggled with getting my right servo to move but after trouble shooting I realized the problem and fixed it .

Rgb sensor .MOV

RGB sensor

Today we were given RGB sensors and we had to solder and code to get it to work properly. The RGB sensor detects color in an object and it might be very useful for our big project sorting things in Drew this year.

circuit diagram rgb sensor and claw

Day 1 skittle sorting robot

Today in class we started a new project an were tasked to create a robot that can sort a group skittles by color. We started off by building our base and coding one servo. We also did research on other candy sorting robots

This sketch is apart of of the idea development process where we came up with the idea of our project .

Day 2 Skittle sorting robot

The circuit of skittle sorter

I was in charge of coding in my group and i started off by coding two servos to turn 90 degrees i also added my rgb sensor.

the updated prototype

my groupmate Seqouia was in charge of the building aspect of the prototype.

Skittles sorting presentation

Research process

On the coding side, the research was very simple for the most part. Most of my research consisted of looking at the motions made in other robots and trying to recreate or get close to them in my code. I did have to go back to my research a few times for inspiration or help.

Function #1 : RGB sensor reading

testing

throughout the coding process testing our RGB sensor was probably the most reoccurring task that was done. I had to constantly test each skittle to get the right numbers in my code so that it wouldn't read as the wrong color. To do this i watched the serial monitor relentlessly to see just the right numbers to put into my code.

Changes made

throughout this process i had to make alot of changes and iterations to my numbers in my code. One account I had to take in was the distance away the skittle would be from the sensor since we moved our sensor around a few times.

Function #2 : Funnel / skittle dropper

testing

Coding the funnel servo to work was not a very tricky task. The way I tested it was i programmed it to turn 90 degrees to the left and stop for 3 seconds so that the color sensor could read then turn another 90 degrees to drop the skittle onto the slide. then return to its initial position.

Changes made

during the design process, I changed the code when we moved the tube on top of the servo at the start it only made one 90 degrees motion to grab the skittle and drop it.

Function #3 : slide

testing

coding the slide servo was also very simple I programed it according to what the color sensor read for example if the color sensor read red it would move 130 degrees but if it was blue it would move 80 degrees

Changes made

Some changes i made was the degrees of the turn it was making because sometimes i would run into the problem that the slide servo degrees wasnt far enough and it would to the wrong bucket

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