Arduino Transistor Circuits

Description of activity:

This page will introduce you to Junction Transistor and how to connect it to the Arduino to control a secondary out put.

Learning Goals. Students will :

Be able to identify and test a simple junction transistor.

Connect the transistor as a switch to control a load like a LED or speaker.

Write an Arduino sketch to control a load through a junction transistor.

Trouble shoot the circuit.

Prior knowledge and background study

• Lesson or prior learning about function of Junction transistor
• Simple transistor control circuit.
• Controlling high current load

Build your circuit

Complete a fritzing diagram of the above circuit using schematic mode (Electronics)

Transistors basic operation provide two functions. What are the two functions and which is being used in this transistor circuit?(fundamentals)

Can we used this transistor circuit to control the direction of the motor? (fundamentals)

Create circuit analysis charts for all of the circuit loops complete the charts by measuring the voltages currents and resistances you can measure and calculate any missing values. (Electronics)

Run the Blink and Fade example sketches make observations and describe the circuit operations in each. (Programming)

How is the speed control achieved in the Fade sketch? (Programming)