Circuit Documentation

Summary

This circuit is designed to control two servos using an Arduino UNO and a push button. The servos start at position 0. When the button is pressed, the servos rotate to 150 degrees and then return to 0 at half the speed. If the button is pressed multiple times within 1 second, the cycle operates multiple times accordingly.

Component List

1. Arduino UNO

   • Description: Microcontroller board based on the ATmega328P.
   • Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0, A1, A2, A3, A4, A5, SCL, SDA, AREF, D13, D12, D11, D10, D9, D8, D7, D6, D5, D4, D3, D2, D1, D0

2. Servo (x2)

   • Description: Standard servo motor.
   • Pins: gnd, vcc, pulse

3. 2Pin Push Switch

   • Description: Simple push button switch.
   • Pins: Input +, Output +

4. 7805

   • Description: Voltage regulator to convert 12V to 5V.
   • Pins: Vin, Gnd, Vout

5. Ceramic Capacitor

   • Description: Capacitor with a capacitance of 0.1 µF.
   • Pins: pin0, pin1

6. Electrolytic Capacitor

   • Description: Capacitor with a capacitance of 1 µF.
   • Pins: -, +

7. Resistor

   • Description: Resistor with a resistance of 10 kΩ.
   • Pins: pin1, pin2

8. 12V Power Supply

   • Description: Power supply providing 12V.
   • Pins: +, -

Wiring Details

Arduino UNO

• GND is connected to:

  • Resistor pin2
  • 7805 Gnd
  • Ceramic Capacitor pin0
  • Electrolytic Capacitor -
  • Servo gnd (both servos)

• Vin is connected to:

  • 7805 Vin
  • Ceramic Capacitor pin1

• D2 is connected to:

  • Resistor pin1
  • 2Pin Push Switch Output +

• D6 is connected to:

  • Servo pulse (first servo)

• D7 is connected to:

  • Servo pulse (second servo)

Servo (first)

• gnd is connected to Arduino UNO GND.
• vcc is connected to:
  • 7805 Vout
  • Electrolytic Capacitor +
  • 2Pin Push Switch Input +
• pulse is connected to Arduino UNO D6.

Servo (second)

• gnd is connected to Arduino UNO GND.
• vcc is connected to:
  • 7805 Vout
  • Electrolytic Capacitor +
  • 2Pin Push Switch Input +
• pulse is connected to Arduino UNO D7.

2Pin Push Switch

• Input + is connected to:
  • 7805 Vout
  • Electrolytic Capacitor +
  • Servo vcc (both servos)
• Output + is connected to:
  • Resistor pin1
  • Arduino UNO D2

7805

• Vin is connected to:
  • 12V Power Supply +
  • Ceramic Capacitor pin1
• Gnd is connected to:
  • Resistor pin2
  • Ceramic Capacitor pin0
  • Electrolytic Capacitor -
  • Servo gnd (both servos)
  • Arduino UNO GND
• Vout is connected to:
  • Electrolytic Capacitor +
  • 2Pin Push Switch Input +
  • Servo vcc (both servos)

Ceramic Capacitor

• pin0 is connected to:
  • 7805 Gnd
  • Resistor pin2
  • Electrolytic Capacitor -
  • Servo gnd (both servos)
  • Arduino UNO GND
• pin1 is connected to:
  • 7805 Vin
  • Arduino UNO Vin

Electrolytic Capacitor

• - is connected to:
  • 7805 Gnd
  • Resistor pin2
  • Ceramic Capacitor pin0
  • Servo gnd (both servos)
  • Arduino UNO GND
• + is connected to:
  • 7805 Vout
  • 2Pin Push Switch Input +
  • Servo vcc (both servos)

Resistor

• pin1 is connected to:
  • 2Pin Push Switch Output +
  • Arduino UNO D2
• pin2 is connected to:
  • 7805 Gnd
  • Ceramic Capacitor pin0
  • Electrolytic Capacitor -
  • Servo gnd (both servos)
  • Arduino UNO GND

12V Power Supply

• + is connected to 7805 Vin.
• - is not connected to any other component in the provided net list.

Code Documentation

// This Arduino sketch controls two servos using a button. The servos start at
// position 0. When the button is pressed, the servos rotate to 150 degrees
// and then return to 0 at half the speed. If the button is pressed twice
// within 1 second, the cycle operates 2 times. If the button is pressed
// three times within 1 second, the cycle operates 3 times.

#include <Servo.h>

#define BUTTON_PIN 2
#define SERVO_PIN_1 6
#define SERVO_PIN_2 7

Servo servo1;
Servo servo2;

unsigned long lastPressTime = 0;
int pressCount = 0;

void setup() {
  pinMode(BUTTON_PIN, INPUT);
  servo1.attach(SERVO_PIN_1);
  servo2.attach(SERVO_PIN_2);
  servo1.write(0); // Initialize servos to position 0
  servo2.write(0); // Initialize servos to position 0
  delay(500); // Wait for servos to reach position 0
  servo1.detach();
  servo2.detach();
}

void loop() {
  if (digitalRead(BUTTON_PIN) == HIGH) {
    unsigned long currentTime = millis();
    if (currentTime - lastPressTime < 1000) {
      pressCount++;
    } else {
      pressCount = 1;
    }
    lastPressTime = currentTime;
    delay(50); // Debounce delay
    while (digitalRead(BUTTON_PIN) == HIGH);
    delay(50); // Debounce delay
  }

  if (pressCount > 0 && millis() - lastPressTime > 1000) {
    for (int i = 0; i < pressCount; i++) {
      servo1.attach(SERVO_PIN_1);
      servo2.attach(SERVO_PIN_2);
      
      // Move servos to position 0 before starting the sweep
      servo1.write(0);
      servo2.write(0);
      delay(500); // Wait for servos to reach position 0

      servo1.write(150);
      servo2.write(150);
      delay(300); // Wait for servos to reach position 150
      for (int pos = 150; pos >= 0; pos--) {
        servo1.write(pos);
        servo2.write(pos);
        delay(30); // Half the speed of moving to 150
      }
      servo1.detach();
      servo2.detach();
    }
    pressCount = 0;
  }
}

This code initializes the servos to position 0 and waits for a button press. Depending on the number of button presses within 1 second, the servos will rotate to 150 degrees and return to 0 at half the speed. The cycle repeats based on the number of button presses detected.