Week_9 Assignments
- Group assignment:
- Individual assignment
- Resistive force Sensor
- Capacitive touch sensor
Our group assignment was to get reading from a digital sensor and an analog sensor
We needed to add a sensor to our Microcontroller board and get readings from it. I used these sensors and made the a PCB:
Group assignment
As for the analog sensor we used a Microphone sensor to get analog readings the made a threshold to convert it to a digital signal.
Also for the analog sensor we made a voltage divider rule to calculate the resistance of a resistor using Xiao ESP32 C3 and known resistor.
Individual assignment
Resistive Force sensor
This sensor working princible is build upon the change of the resistance caused by forced deformation/pressure. I tested it in Tinkercad to see how much resistance needed to be connected to this sensor to act like a voltage divider first resistor and the sensor is the second one that changes and causes the output voltage to change.
I found that a 1K ohm resistor got me a wide range of readings in real life. So I began to design my PCB for the resistive sensor. I made the sensor detachable to make this PCB modular for any resistive sensor (where its range depends on the fixed 1Kohm resistance).
Also I didn't like it to be a rectangular shape and I wanted to be cool ^^. so I downloaded a PNG of the famous Kunai of Minato Namekazi from the anime series Naruto Shippuden which I am a big fan of.
- I used inkscape to bitmap the outlines and the writings.
- Then I added the SVG files to Kicad and I exported the outline and the writings seprately. then imported the to the PCB editor in Kicad. using Import-> Graphic
- Then I edited the placement of the components.
- Then I fabricated it.
- I soldered the components and connected the sensor.
- I tested it using Arduino IDE
- I tinkered more and used the map function to control an LED I added as an Output to my Xiao board.
