WEEK 10 – Output Devices

Assignments

Group Assignment

• Measure the power consumption of an output device

Individual Assignment

• Add an output device to a microcontroller board you've designed, and program it to do something

Group Work

Our group work is accessible HERE (add the link)

Individual Work

PART ONE 😃

This first Output Device test is the continuity of my Input Device test (week 9) which should trigger a Relay as Output (reference: JOC-3FF-S-Z) when two Input conditions are fulfilled: Object within 25cm + Red colour detected = Relay ACTIVATED.

Pin Assignment Plan:

Pins (IAO-ESP32-S3)	Signal Name
D0	6*6 Puch Button Switch
A6	Ultrasonic Sensor TRIG
A2	Ultrasonic Sensor ECHO + Resitor 1000 Ω
D4	Relay IN
A5	Rotational Sensor OUT
D1	LED +
GND	Ultrasonic Sensor / Rotational Sensor / Relay / LED - / Ultrasonic Sensor ECHO + Resitor 2000 Ω
VCC	Ultrasonic Sensor / Rotational Sensor / Relay / 6*6 Push Button Switch

Schematic/Wiring:

Codes for the Relay in Arduino IDE:
(Refer to Week 9 for the complete codes)

  // 4. Dual Condition Relay Logic (AND)
  Serial.printf("| Dist:%.1fcm | Red:%s | ", distance, isRed ? "YES" : "NO");

  if (isNear && isRed) {
    digitalWrite(PIN_RELAY, HIGH);
    Serial.println(">>> RELAY: ACTIVE <<<");
  } else {
    digitalWrite(PIN_RELAY, LOW);
    // Debug specific missing condition
    if (isNear && !isRed) Serial.println("[WAITING FOR RED]");
    else if (!isNear && isRed) Serial.println("[OBJECT TOO FAR]");
    else Serial.println("[IDLE]");
  }

Circuit Implementation & Test:

SUCCESSSSSSS!!! 😃 😃 😃

PART TWO 😃

For my second Output Device test, I decided to use a Step Motor (model 28HB30-402A) and a Stepper Motor Drive Module with Heat Sink (model A4988). This is a useful test as we might need it for our Machine Design in a few weeks time.

Pin Assignment Plan:

Pins (IAO-ESP32-S3)	Signal Name
D0	6*6 Puch Button Switch
D1	LED +
D3	A4988 S.M.D. DIR
D4	A4988 S.M.D. STEP
D6	A4988 S.M.D. ENABLE
VCC 3V3	A4988 S.M.D. VDD
GND	A4988 S.M.D. GND / LED -
VCC 5V	6*6 Push Button Switch

Circuit Connections:

(Original Image Source)

Codes in Arduino IDE:
(Original Code Source)

//steppermotorA4988withclass_singleDEMO.ino
// A4988ステッピングモータードライバーモジュール

#include "StepperMotorESP32.h"

StepperMotorESP32 stepper;

uint32_t MinPulsePeriod = 200; //[microsec]
uint32_t ControlFrequency = 100; //[Hz]
const uint8_t PinDIR  = D3;
const uint8_t PinSTEP = D4;
const uint8_t PinEnable = D6; // モータドライブEnable（府論理）に使用する PIN番号

int MaxControlValue;

void setup() {
  Serial.begin(115200);
  delay(100);
  Serial.println("Hello");

  stepper.setPins(PinDIR, PinSTEP, PinEnable);
  stepper.setDirModifier(1);
  MaxControlValue = stepper.getMaxControlValue(ControlFrequency, MinPulsePeriod);
  Serial.print("MaxControlValue = ");
  Serial.println(MaxControlValue);
  stepper.enableDriver();
}

void loop() {
  static int control = 0;
  static int dcontrol = 1;
  static int n=0;
  int res;
  double fcontrol = (double)control/50.;
  res = stepper.drive(fcontrol);

  n++;
  if (n == 100) {
    if (control == 5 || control == -5) {
      dcontrol *= -1;
    }
    control += dcontrol;
    n=0;
    Serial.print("control, res = ");
    Serial.print(fcontrol);
    Serial.print(", ");
    Serial.println(res);
  }
  delay(1000/ControlFrequency); //[msec]
}

Circuit Implementation & Test:

SUCCESSSSSSS!!! 😃 😃 😃