Focus was on wiring and code and fun projects. Parts are easy to obtain in an electronics shop.
Week 1: From Blinky to DC Motor and photo-resistor : 
Blinking LED - digitalWrite
Dimming LED - analogWrite
DC Motor - reused LED code from above and using H Bridge to connect motor to Arduino
Photo-resistor - reuse LED wiring, but used analogRead to see how much light was sensed.
Week 2: Stepper motor Ferris wheel ...
using a push button to run.
Week 3: 2 Servo motors Popsicle stick Robot arm
A 2 axis robot arm moving around the base or move arm up and down.
Week 4: Servo motor Catapult set off by ultrasonic sensor
Careful! If get to close the catapult will shoot a cotton ball at you!
Bring Classes together: Obstacle avoidance
If Ultrasonic sensor found too close to object then move Robot tank (Th class) using 2 DC motors to avoid.
On Thursday was a Mechanical / Robotics Classes where a robot tank car using 2 DC motors had been built. Added on top was ultrasonic sensor to measure how close to object the robot was.
Upcoming posts will cover each of these projects and more.
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