Bill of Materials (BOM)
| S.No | Reference | Value | Part | Quantity |
|---|---|---|---|---|
| 01 | R1, R3 | 4K7 | 1/4 Watt Resistor | 2 |
| 02 | R2, R4 | 330 ohms | 1/4 Watt Resistor | 2 |
| 03 | C1, C2 | 22pF | Ceramic Disc Capacitor | 2 |
| 04 | C3, C4 | 0.1uF | Ceramic Disc Capacitor | 2 |
| 05 | Q1 | BC548 | Transistor | 1 |
| 06 | D1 | - | 5mm Round LED GREEN | 1 |
| 07 | D2 | - | 5mm Round LED RED | 1 |
| 08 | U1 | - | PIC16F877A Microcontroller (PRE PROGRAMMED WITH FIRMWARE) | 1 |
| 09 | J1 | - | USB Type A Plug | 1 |
| 10 | J2 | - | 2 Pin Relimate Connecter | 1 |
| 11 | J3 | - | 6 Pin Relimate Connecter | 1 |
| 12 | SW1 | - | Toggle Switch | 1 |
| 13 | X1 | 20MHz | Crystal Oscillator | 1 |
| 14 | X5 | 5v | Buzzer 10mm Diameter | 1 |
| 15 | - | - | Vibrator Motor (Optional) | 1 |
| 16 | X2,X3,X4 | - | HC-SR04 Ultrasonic Rangefinder Module | 3 |
| 17 | - | - | 5v Rechargeable Power Bank | 1 |
| 18 | - | - | Charger for Power Bank with Cable | 1 |
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