Senti-Scan 2000

by Helios_ma in Circuits > Arduino

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Senti-Scan 2000

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The Senti-Scan 2000 is a compact, intelligent security turret that autonomously monitors its surroundings using ultrasonic sensors, delivers real-time threat assessments via LCD, and escalates alerts with custom LED indicators and multi-stage alarm tones. Designed for home security, lab protection, or tactical training, this system combines military-grade responsiveness with Arduino’s versatility.

Supplies

  1. Arduino Uno
  2. HC-SR04 Ultrasonic Sensor
  3. 16x2 Parallel LCD (Non-I2C)
  4. Active Buzzer
  5. LEDs (White, Red, Yellow)
  6. 220Ω Resistors (x3, for LEDs)
  7. 10K Potentiometer (for LCD contrast)
  8. Breadboard
  9. Jumper Wires


🔧 Step-by-Step Build Guide

1. Assemble the Circuit

Wiring Map:

ComponentArduino PinNotes

LCD RS

D7

Register Select

LCD E

D8

Enable

LCD D4-D7

D9-D12

Data pins (4-bit mode)

LCD V0

Pot Middle Pin

Contrast control

LCD A/K

5V/GND

Backlight power

Ultrasonic Trig

D2

HC-SR04 Trigger

Ultrasonic Echo

D3

HC-SR04 Echo

Buzzer (+)

D13

Active buzzer control

White LED (+)

D4 → 220Ω → LED

Standby indicator

Red LED (+)

D5 → 220Ω → LED

Threat indicator

Yellow LED (+)

D6 → 220Ω → LED

Warning indicator

Steps:

  1. Power Rails: Connect Arduino 5V and GND to breadboard rails.
  2. LCD Setup:
  3. Wire RS, E, D4-D7 to Arduino.
  4. Connect potentiometer outer pins to 5V/GND, middle pin to LCD V0.
  5. Ultrasonic: Attach Trig/Echo to D2/D3, power to 5V/GND.
  6. LEDs: Connect each LED through a 220Ω resistor to GND.
  7. Buzzer: Link (+) to D13, (-) to GND.

2. Upload the Code

  1. Copy the code
  2. In Arduino IDE:
  3. Select Tools → Board → Arduino Uno.
  4. Tools → Port → [Your Arduino COM Port].
  5. Click Upload.