Circuit Documentation

Summary

The circuit is designed to simulate a ghost trap from the movie Ghostbusters. It features a variety of components including servos, LEDs, a bargraph, a haptic motor, a DC motor, and a water pump to create an effect of a ghost being trapped and the trap experiencing an electrical failure. The sequence can be activated by a Bluetooth input or an encoder knob switch. The encoder knob also controls the volume. The circuit is controlled by an Arduino Mega ADK microcontroller.

Component List

• Adafruit 16-Channel 12-bit PWM Servo Driver - I2C: Used to drive multiple PWM servos.
• Adafruit DRV2605L: A haptic controller for vibration motors.
• Vibration Motor: Provides haptic feedback.
• Servo: Actuators for moving parts of the trap.
• Adafruit PowerBoost 1000C: A power supply module for battery charging and 5V regulation.
• Mosfet: Used to switch higher current loads with a microcontroller.
• 5v mini water pump: Simulates the effect of the ghost being trapped.
• Lamp Red: Provides visual indication.
• Adafruit Bi-Color 24-Bar Bargraph w/ I2C Backpack: Displays visual information.
• LED: Two Pin (red): Simple indicator LED.
• Resistor: Used for current limiting and pull-up/down resistors.
• Rotary Encoder: Provides user input for control and volume adjustment.
• DC Motor: Used to simulate mechanical movements.
• Diode: Prevents back EMF from the DC motor.
• NPN Transistor (EBC): Used as a switch for controlling various components.
• Speaker: Outputs audio signals.
• Adafruit Music Maker Shield with Amp: Handles audio playback and amplification.
• Adafruit Bluefruit LE UART Friend: Provides Bluetooth connectivity.
• 2Pin Push Switch: A simple push button switch.
• 1 Watt LED Cool White w/ Heatsink: High-power LEDs for bright visual effects.
• Arduino Mega ADK (Rev3): The main microcontroller board that controls the circuit.
• 2000mAh Battery: Provides power to the circuit.
• Terminal Block: Used for making easy connections to the board.
• Toggle Switch SPST: A single-pole single-throw switch for power control.
• AMS1117 3.3: A voltage regulator for providing 3.3V.

Wiring Details

Adafruit 16-Channel 12-bit PWM Servo Driver - I2C

• 5.0V and VCC connected to 5V power supply.
• SDA and SCL connected to I2C bus (Arduino Mega ADK).
• OE not connected.
• GND connected to ground.
• PWM0 to PWM15 connected to servos and other PWM devices.

Adafruit DRV2605L

• VIN connected to 5V power supply.
• GND connected to ground.
• SCL and SDA connected to I2C bus (Arduino Mega ADK).
• IN/TRIG connected to digital pin D31 (Arduino Mega ADK).
• OUT+ and OUT- connected to Vibration Motor.

Vibration Motor

• POS connected to OUT+ on Adafruit DRV2605L.
• NEG connected to OUT- on Adafruit DRV2605L.

Servo

• GND connected to ground.
• VCC connected to 5V power supply.
• PWM connected to PWM output from Adafruit 16-Channel PWM Servo Driver.

Adafruit PowerBoost 1000C

• GND connected to ground.
• 5.0V connected to 5V power supply.
• VBUS and VLIPO connected to 2000mAh Battery.
• ENABLE connected to Toggle Switch SPST.

Mosfet

• Gate connected to digital pin D28 (Arduino Mega ADK).
• Drain connected to 5v mini water pump and NPN Transistor (EBC).
• Source connected to ground.

5v mini water pump

• positive pin connected to Mosfet.
• negative pin connected to ground.

Lamp Red

• + connected to digital pin D27 (Arduino Mega ADK).
• - connected to ground through a resistor.

Adafruit Bi-Color 24-Bar Bargraph w/ I2C Backpack

• VDD connected to 5V power supply.
• GND connected to ground.
• SDA and SCL connected to I2C bus (Arduino Mega ADK).

LED: Two Pin (red)

• cathode connected to ground through a resistor.
• anode connected to digital pin D26 (Arduino Mega ADK).

Resistor

• Connected in series with LEDs and other components for current limiting.

Rotary Encoder

• clk and dt connected to digital pins A0 and A1 (Arduino Mega ADK).
• sw connected to digital pin A2 (Arduino Mega ADK).
• gnd connected to ground.
• + connected to 5V power supply.

DC Motor

• One pin connected to NPN Transistor (EBC) collector.
• Other pin connected to ground through a diode.

Diode

• cathode connected to DC Motor.
• anode connected to NPN Transistor (EBC) collector.

NPN Transistor (EBC)

• emitter connected to ground.
• base connected to digital pins D22, D23, D25 (Arduino Mega ADK) through resistors.
• collector connected to various components like DC Motor, Diode, and LEDs.

Speaker

• + and - connected to Adafruit Music Maker Shield with Amp.

Adafruit Music Maker Shield with Amp

• Connected to Arduino Mega ADK through ICSP and digital pins for control and data transfer.

Adafruit Bluefruit LE UART Friend

• MODE, CTS, TXO, RXI, VIN, RTS, GND, DFU connected to corresponding pins on Arduino Mega ADK for Bluetooth communication.

2Pin Push Switch

• Input + connected to digital pin A15 (Arduino Mega ADK).
• Output + connected to ground.

1 Watt LED Cool White w/ Heatsink

• Positive connected to 5V power supply.
• Negative connected to ground through NPN Transistor (EBC) and resistors.

Arduino Mega ADK (Rev3)

• Various digital and analog pins connected to components as described above.
• 5V and GND used to power components and provide ground reference.
• VIN connected to 5V power supply.

2000mAh Battery

• VCC connected to Adafruit PowerBoost 1000C.
• GND connected to ground.

Terminal Block

• Used for organizing connections to various components.

Toggle Switch SPST

• L1 connected to Adafruit PowerBoost 1000C ENABLE.
• COM connected to ground.

AMS1117 3.3

• VIN connected to 5V power supply.
• OUT connected to 3.3V components.
• GND connected to ground.

Documented Code

/*
 * Ghostbusters Trap Simulation
 * This code simulates a ghost trap from the movie Ghostbusters.
 * It controls servos, LEDs, a bargraph, a haptic motor, a DC motor,
 * and a water pump to create an effect of a ghost being trapped
 * and the trap experiencing an electrical failure.
 * The sequence can be activated by a Bluetooth input or the encoder knob switch.
 * The encoder knob also controls the volume.
 */

#include <Adafruit_PWMServoDriver.h>
#include <Adafruit_VS1053.h>
#include <Adafruit_LEDBackpack.h>
#include <Wire.h>
#include <Servo.h>
#include <SoftwareSerial.h>

#define LED_D26 26
#define LED_D27 27
#define LED_D22 22
#define LED_D23 23
#define LED_D25 25
#define SWITCH_PIN 31
#define HAPTIC_PIN 20
#define DC_MOTOR_PIN 29
#define PUMP_PIN 28
#define ENCODER_SW_PIN 48
#define ENCODER_CLK_PIN 49
#define ENCODER_DT_PIN 46
#define BLUETOOTH_RX 18
#define BLUETOOTH_TX 19

Adafruit_PWMServoDriver pwm = Adafruit_PWMServoDriver();
Adafruit_VS1053_FilePlayer musicPlayer = Adafruit_VS1053_FilePlayer();
Adafruit_24bargraph bargraph = Adafruit_24bargraph();
Servo leftServo;
Servo rightServo;
SoftwareSerial bluetooth(BLUETOOTH_TX, BLUETOOTH_RX);

volatile int lastEncoded = 0;
volatile long encoderValue = 0;
long lastencoderValue = 0;
int lastMSB = 0;
int lastLSB = 0;