unl-digifab

Week 13 - More Sensors and DC Motor

Tuesday

Thursday

Tuesday

Agenda

• Artist of the Day
• More Sensors
  • ~Temperature Sensor~
  • Ultrasonic Rangefinder
  • Rangefinder to P5
• DC Motor and High Power
• Homework
• Office Hours this Week

Artist of the Day

Amy Youngs

• Rearming the Spineless Apuntia
• rest of portfolio: https://hypernatural.com/art/

Temperature sensor

(image from Adafruit)

• The TMP 36GZ is a temperature sensor.
• This is an active sensor, meaning we provide power to ground and 5V, and it outputs a voltage proportional to temperature.
  • Looking at the datasheet, we see it is 10mV/degree Celsius. That means we can use the output voltage (read by analog in) to figure out what the temperature is.
• To convert from AnalogRead value to milli-volts: Voltage at pin in milliVolts = (reading from ADC) * (5000/1024)
• To convert from milliVolts to degree celsius: Centigrade temperature = [(analog voltage in mV) - 500] / 10
• Activity:
  • Use AnalogReadSerial to figure out what the current temperature in the room is in Celsius.
  • Modify your code to convert Celsius to fahrenheit.
  • Explore the dynamic behavior: how quickly does it change in response to breathing on it? In response to touching it? Can you get the temperature to go up, or go down?

Ultrasonic Rangefinder

See this file from the ELEGOO examples: l10 ultrasonic sensor.pdf

And this code: Lesson 10 Ultrasonic Sensor Module.zip

Bonus Artist: Garnet Hertz

DC Motor

See this file from the ELEGOO examples: l21 dc motor.pdf

And this code: Lesson 21 DC Motors.zip

Homework

Starting thinking about a final project.

Office Hours

Wednesday 4-6pm.

Thursday

Agenda

• Artist of the Day
• Relay
• Stepper Motor
• Homework

Artist of the Day 2

Garnet Hertz

• Cockroach Bot http://www.conceptlab.com/roachbot/

Relay

See this file from the ELEGOO examples: l22 relay.pdf

And this code: Lesson 22 Relay.zip

Stepper Motor

See this file from the ELEGOO examples: l23 stepper.pdf

And this code: Lesson 23 Stepper Motor.zip

Homework 2

Write a proposal for the final project. Due Tuesday morning 11/22 for one-on-one meetings. https://canvas.unl.edu/courses/137404/assignments/1370188

Reference

• Detailed HC-SR04 tutorial with LEDs and Arduino https://www.instructables.com/Simple-Arduino-and-HC-SR04-Example/