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Transcript
Implementation of a Transistor Circuit
TEAMS OF 2: A transistor is a semiconductor device that can be used as an “electrical switch” or
as an amplifier. We will learn more about how transistors work later in the class. Implement the
following circuit on your Arduino:
Compare the pin locations of C, B
and E to the circuit diagram.
Be sure to point the SHORT leg of
the LED toward ground
Now, write a simple program to
make the LED blink on and off.
To do this, make pin 4 go HIGH
and LOW in an infinite loop, and
you choose the duration of the
blinks.
void setup() {
pinMode(4,OUTPUT);
}
void loop() {
digitalWrite(4, HIGH);
delay(1000);
digitalWrite(4, LOW);
delay(1000);
}
Question: What is happening when you change the values of the pause command??????
Answer: The transistor is SWITCHING the LED on and off.
We will use transistors to activate a relays for switching solenoid valves and our fishtank heater
on and off. Now, let’s learn about how transistors work and more about semiconductors in
general.
