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Week 6. Group / Electronics Design

This is group assignment page for West harima student :

Student

group assignment

  • use the test equipment in your lab to observe the operation
  • of a microcontroller circuit board

Test equipment used

RIGOL OscilloscopesDS1054Z

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  • Frequency band: 50 MHz
  • Number of analog channels: 4
  • Real-time sample rate: 1 GSa/s
  • Maximum memory length : 24 Mpts
  • Waveform acquisition rate : 30,000 wfms/s

An oscilloscope is a measuring instrument that displays the waveform of an electrical signal in real time on a time axis and can observe changes in voltage.

Main uses of oscilloscopes

  • Checking the operation of electronic circuits (measuring voltage waveforms and signal changes)
  • Troubleshooting signals (detect noise and abnormal voltage)
  • Measuring frequency and period (analyzing clock signals and AC waveforms)
  • Analyze communication signals (check digital signals such as UART, SPI, I²C)
  • Visualization of audio signals (measuring audio and vibration waveforms)
  • Evaluation of power electronics (check operation of inverters and switching power supplies)
  • Measurement of high-frequency circuits (analysis of RF circuits and antenna characteristics)

oscilloscope

1.Probe Calibration

1.0 Connect the probe to the DS1054 body (be careful not to connect the probe in the opposite direction, as it has its own orientation)
At this time, make sure that the color of the probe matches the color of the channel on the main unit.

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1.1 Probe switch set to x10

1.2 Next, turn on the power and press “Auto” at the bottom

1.3 If the waveform is not flat, turn the probe screw and adjust until the waveform is flat (correction is complete when the waveform is straight)

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1.The part to adjust the time
2.The part to adjust the voltage

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2.test

I used a Fab XIAO board designed by Adrian that I built with week4 and used Adrian’s code as a reference!

Test1(LED lighting interval:1.5sec)

oscilloscope setting
voltage 1.0v
time 500ms

2.0 programming

In this case, we used Arduino IDE for programming.

LED lighting interval: 1.5 sec.

//Fab Academy 2023 - Fab Lab León
//Button + LED                           
//Fab-Xiao
//
//Original code:Neil Gershenfeld 12/8/19
// This work may be reproduced, modified, distributed,
// performed, and displayed for any purpose, but must
// acknowledge this project. Copyright is retained and
// must be preserved. The work is provided as is; no
// warranty is provided, and users accept all liability.
//


const int ledPin1 = D6;//first light  RP2040 pin 0 or ESP32-C3 pin D6 
const int buttonPin = D7;// button pin  RP2040 pin 1 or ESP32-C3 pin D7 
int buttonState = 0;//initial state of the button
int i = 0; //variable intensity led

void setup() { //declaration of inputs and outputs
  pinMode(ledPin1, OUTPUT);
  pinMode(buttonPin, INPUT);
}
void loop() {
  buttonState = digitalRead(buttonPin);// we read the state of the button
  if (buttonState == HIGH) { //if we press the button
  digitalWrite(ledPin1, HIGH);
  delay(1500);                       
  digitalWrite(ledPin1, LOW);    
  delay(1500);
  digitalWrite(ledPin1, HIGH);
  delay(1500);                       
  digitalWrite(ledPin1, LOW);    
  delay(1500);
  digitalWrite(ledPin1, HIGH);
  delay(1500);                        
  digitalWrite(ledPin1, LOW);    
  delay(1500);

}
  else {  //if we don't press the button
  digitalWrite(ledPin1, LOW);
  }
}

multimeter

oscilloscope

result
multimeter I was able to confirm a firm voltage change.
oscilloscope The waveform of the same voltage as programming could be verified.

Test2(LED lighting interval:0.5sec)

oscilloscope setting
voltage 1.0v
time 100ms

2.1 programming

LED lighting interval: 0.5 sec.

//Fab Academy 2023 - Fab Lab León
//Button + LED                           
//Fab-Xiao
//
//Original code:Neil Gershenfeld 12/8/19
// This work may be reproduced, modified, distributed,
// performed, and displayed for any purpose, but must
// acknowledge this project. Copyright is retained and
// must be preserved. The work is provided as is; no
// warranty is provided, and users accept all liability.
//


const int ledPin1 = D6;//first light  RP2040 pin 0 or ESP32-C3 pin D6 
const int buttonPin = D7;// button pin  RP2040 pin 1 or ESP32-C3 pin D7 
int buttonState = 0;//initial state of the button
int i = 0; //variable intensity led

void setup() { //declaration of inputs and outputs
  pinMode(ledPin1, OUTPUT);
  pinMode(buttonPin, INPUT);
}
void loop() {
  buttonState = digitalRead(buttonPin);// we read the state of the button
  if (buttonState == HIGH) { //if we press the button
  digitalWrite(ledPin1, HIGH);
  delay(500);                       
  digitalWrite(ledPin1, LOW);    
  delay(500);
  digitalWrite(ledPin1, HIGH);
  delay(500);                       
  digitalWrite(ledPin1, LOW);    
  delay(500);
  digitalWrite(ledPin1, HIGH);
  delay(500);                        
  digitalWrite(ledPin1, LOW);    
  delay(500);

}
  else {  //if we don't press the button
  digitalWrite(ledPin1, LOW);
  }
}

multimeter

oscilloscope

result
multimeter LEDs lit up, but did not see the same voltage changes as programming
oscilloscope The waveform of the same voltage as programming could be verified.

3.What I learned

  • Even changes in voltage that could not be confirmed with a multimeter could be confirmed with a oscilloscope.
  • The right equipment should be used according to the situation and need at the time.