ESC 100 – Exploring Engineering

Lab 1 – Introduction to Arduino

Thursday, September 12, 2013

A bit more about me…

B.S. in Biomedical Engineering, Johns Hopkins University (May 2007)

Ph.D. in Bioengineering, University of Pennsylvania (August 2012)Thesis: Engineering Hyaluronic Acid Hydrogel Degradation to

Control Cellular Interactions and Adult Stem Cell Fate in 3D

Visiting Assistant Professor, Union College Bioengineering (September 2012 – present)

Sameer Sudhir

Max the pit-boxer dog(also an office dog)

Course update• All lab specific documents will be posted on my

website:– orzo.union.edu/~khetans– My office hours: TW 2-4pm, Butterfield 109

• Agenda for today:– Hand-in:

• Honor code affirmation• Clicker agreement• Pre-engineering survey (will do at start of lab)

– Arduino and PC/Mac setup– Introduction to Arduino

• Deliverables– Nothing to hand in at end of lab today!– Beginning of next lab: bring your working circuit 15 (LCD)

• Your grade will either be 100 (works) or 0 (doesn’t work)

RedBoard

Analog versus digital

• Humans perceive the world in analog

– e.g., temperature, color• Characterized by a continuous

stream of possible values• In the world of Arduino:

– An analog signal can be HIGH (on), LOW (off), or anything in between

– The board receives Analog Input from pins #0 to #5

• Uses the command “analogRead(pinNumber)”

– We will also see how to output an analog signal to the RedBoard

• Robots, computers, and circuits use digital

• Digital estimates analog data by using only ones and zeros.

• In the world of Arduino:– Digital signals used for

everything except Analog Input– For a 5V RedBoard (what we will

be using)• ON or HIGH is 5 V• OFF or LOW is 0 V

Circuit 1 – LED

Let’s take a look at the code for this circuit

Returning to our earlier example...

This setup is equivalent to that on the previous slide!

Circuit 2 – Potentiometer

Let’s take a look at the code for this circuit

• In this two circuit setup, the signal going to the LED is dependent on the position of the potentiometer dial:

Wrapping up

• Try out these and the other circuits in your manual– The sooner you become familiar with Arduino, the

better shape you’ll be in for the project!

• Reminder: Working circuit #15 is due at the beginning of next class!

• Tomorrow lecture – Technical communication– Engineering seminars and HW– Intro to energy