Motor!

 We measured the energy flow going to the motor using the multimeter. It was steady at around 25 volts, but when we held the end of the motor and tried to slow it down manually, the amount of energy going to the motor increased. So the more resistance, the more energy required to keep the motor going.

This is a really low quality video of the motor moving back and forth using the blink function.

Toy Circuit

 We made a circuit with a diode and relay, and we used the blink program to make a toy cell phone make noises periodically.

When a motor was connected, the same thing happened, except the motor spun periodically.

Game Controller

 After constructing the game controller, I made a physical interface for it. I fed the wires through a box to a slide-button type controller and hid the bread box inside the bottom layer of the box. To play the game, one simply slides the aluminum finger pads onto the squares on the panel to complete the circuits.

3 Button Tetris!

 In class we set up a circuit that allowed us to play Tetris with three buttons: Left, Right, and Rotate.

16 September 2015

 DIODE

 This Ultrasonic Ranger was capable of using high frequency sounds to report the proximity of an object. When an object was within 5 inches of the Ranger, the code would print out the approximate distance of the object in inches. 

 Here's a circuit with two resistors. The voltage is still about 5v.

 But if you place the alligator clips in a way that lets you measure the total resistance, you see that there is about a 50% drop in voltage.

 Here we set up a speaker system that would play a tone on equal intervals. The potentiometer allowed us to pitch-shift the tone by changing the analog input value.

The same speaker system with a photoresistor added in allowed us to change the pitch by shifting the light as well as turning the knob on the potentiometer.

When measuring just the 10k resistor, the multimeter showed 9.8 Ohms of resistance.

When in a circuit, the resistor cuts the voltage in half, resulting in about 5v of power.

 The photoresistor only let 2k through when in full light.

When covered, however, the photoresistor let almost the full 20k through.