Circuit Documentation

Summary

This circuit involves an Arduino UNO microcontroller interfacing with two HC-SR04 Ultrasonic Sensors, a 4-channel relay module, an EZ-SFX amplifier, and two loudspeakers. The circuit is powered by a Polymer Lithium Ion Battery. The Arduino UNO controls the relays and reads data from the ultrasonic sensors. The EZ-SFX amplifier drives the loudspeakers.

Component List

1. HC-SR04 Ultrasonic Sensor

   • Description: Ultrasonic distance sensor
   • Pins: VCC, TRIG, ECHO, GND

2. 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

3. Polymer Lithium Ion Battery - Generic

   • Description: Rechargeable battery
   • Pins: GND, VCC

4. EZ-SFX Amp

   • Description: Audio amplifier
   • Pins: VIN, GND, VBUS, PWRBUTTON, TX, RX, UG, VOL+, VOL-, CS, R, L, ACT, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, RST, L+, L-, R-, R+

5. Loudspeaker

   • Description: Audio output device
   • Pins: pin1, pin2

6. Relay 4 Channel 5v

   • Description: 4-channel relay module
   • Pins: GND, IN1, IN2, IN3, IN4, VCC, COM1, COM2, COM3, COM4, NO1, NO2, NO3, NO4, NC1, NC2, NC3, NC4

Wiring Details

HC-SR04 Ultrasonic Sensor 1

• VCC connected to Arduino UNO 5V
• TRIG connected to Arduino UNO D5
• ECHO connected to Arduino UNO D4
• GND connected to Arduino UNO GND

HC-SR04 Ultrasonic Sensor 2

• VCC connected to Arduino UNO 5V
• TRIG connected to Arduino UNO D3
• ECHO connected to Arduino UNO D2
• GND connected to Arduino UNO GND

Arduino UNO

• 5V connected to HC-SR04 Ultrasonic Sensor 1 VCC, HC-SR04 Ultrasonic Sensor 2 VCC, Relay 4 Channel 5v VCC
• GND connected to HC-SR04 Ultrasonic Sensor 1 GND, HC-SR04 Ultrasonic Sensor 2 GND, Polymer Lithium Ion Battery GND, Relay 4 Channel 5v GND, EZ-SFX Amp GND
• D10 connected to Relay 4 Channel 5v IN1
• D9 connected to Relay 4 Channel 5v IN3
• D8 connected to Relay 4 Channel 5v IN4
• 3.3V connected to EZ-SFX Amp VIN

Polymer Lithium Ion Battery

• VCC connected to Arduino UNO 5V, HC-SR04 Ultrasonic Sensor 1 VCC, HC-SR04 Ultrasonic Sensor 2 VCC, Relay 4 Channel 5v VCC
• GND connected to Arduino UNO GND

EZ-SFX Amp

• VIN connected to Arduino UNO 3.3V
• GND connected to Arduino UNO GND
• L+ connected to Loudspeaker 2 pin2
• L- connected to Loudspeaker 2 pin1
• R+ connected to Loudspeaker 1 pin2
• R- connected to Loudspeaker 1 pin1

Loudspeaker 1

• pin1 connected to EZ-SFX Amp R-
• pin2 connected to EZ-SFX Amp R+

Loudspeaker 2

• pin1 connected to EZ-SFX Amp L-
• pin2 connected to EZ-SFX Amp L+

Relay 4 Channel 5v

• VCC connected to Arduino UNO 5V
• GND connected to Arduino UNO GND
• IN1 connected to Arduino UNO D10
• IN3 connected to Arduino UNO D9
• IN4 connected to Arduino UNO D8
• COM1, COM2, COM3, COM4 are internally connected

Documented Code

Arduino UNO Code (sketch.ino)

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

Additional Documentation (documentation.txt)