Motor/Transistor Labs

The first lab was to set up a motor running off it's own power with a TIP120 transistor. The potentiometer controls the motors speed by having the microcontroller pulse the transistor. The 9v battery is plugged into a 5v voltage regulator, which powers the motor. The arduino is powered by the USB.
















The second lab involved setting up an H-bridge IC with the motor. The switch toggles between running the motor fowards and backwards.

Serial Duplex

In this lab, multiple sensor values are sent to the computer via serial. A Processing sketch listens to the port and interperets the data, first separating the three sensor values, then reading the two analog values (potentiometers) as x and y coordinates for a circle and the one digital (button) value as whether or not to display the circle
(switching it from black to white)

The board:














The board and Processing sketch (note my hand pressing the button in the bottom left):






































For my own interface, I sent serial data from a photoresistor reading to control the red and green values of a point light illuminating a sphere in Processing's 3d renderer:


























































(Note the position of my hand, blocking the photoresistor's light. As the photoresistor is put in darkness, the orange light on the blue sphere brightens.)

The board:

Serial Output

In this lab the arduino sends the potentiometer reading as serial data over to the computer. A Processing sketch reads the data and displays a graph of the potentiometer's value.















The board (ignore the buttons on the bottom left)

Analog I/O Labs

Sorry about the delay putting these up, I had to wait to get a computer with an SD card reader. Luckily my laptop finally came back from the shop yesterday so I'll never have this problem again.

Analog input: The number of lights lit goes up as you bend the sensor. (I also did this with a photocell which was pretty cool, but I didnt take a picture)












































Analog output (Servo Lab) : The servomotor/flex sensor combo is pretty weird; it's strange to have something move precisely with you as you push something else.