A ‘Remote Pi Vehicle’ (R.P.V.) that could be equipped with a camera and sensors, that can then be controlled from a web server over Wi-Fi.
| Qty | Name | Jaycar Cat. No |
|---|---|---|
| Red Wire | WH3000 | |
| Black Wire | WH3001 | |
| 3.0mm Black Heatshrink | WH5532 | |
| 2 | White 5mm LED | ZD0196 |
| 4 | Yellow 5mm LED | ZD0166 |
| 2 | White 5mm Cree LED | ZD0290 |
| 2 | Red 5mm Cree LED | ZD0293 |
| 1 | 3.3 Ohm 1/4 Watt Resistors - 8 Pack | RR1514 |
| 1 | 51 Ohm 1/2 Watt Resistors - 8 Pack | RR0541 |
| 1 | 43 Ohm 1/2 Watt Resistors - 8 Pack | RR0539 |
| 2 | 18650 2600mAh Li-ion Protected Battery | SB2299 |
| 2 | Single 18650 Battery Holder | PH9205 |
| 1 | DC Voltage Regulator | XC4514 |
| 1 | L293D Dual Full Bridge Motor Driver IC | ZK8880 |
| 1 | 5MP Night Vision Camera for Raspberry Pi | XC9021 |
| 1 | CCS811B Air Quality Sensor | XC3782 |
| 1 | 4 Wheel Drive Motor Chassis Robotics Kit | KR3162 |
| 1 | Raspberry Pi 3A+ |
| Item | BCM GPIO Pin | Physical Board Pin |
|---|---|---|
| L293 Pin 2 | 5 | 29 |
| L293 Pin 7 | 6 | 31 |
| L293 Pin 9 | 12 | 32 |
| L293 Pin 10 | 23 | 16 |
| L293 Pin 15 | 24 | 18 |
| L293 Pin 1 | 13 | 33 |
| L293 Pin 16 | 3v3 | 17 |
| L293 Pin 4* | GND | 20 |
| Front Lights | 17 | 11 |
| Front Left Indicator | 27 | 13 |
| Front Right Indicator | 22 | 15 |
| Back Lights | 26 | 37 |
| Back Left Indicator | 20 | 38 |
| Back Right Indicator | 21 | 40 |
| LED Ground | GND | 30 |
| I²C Power | 3v3 | 1 |
| I²C Ground | GND | 9 |
| I²C Wake/Ground** | GND | 14 |
| I²C SDA | 2 | 3 |
| I²C SCL | 3 | 5 |
| Regulator 5V | 5v | 4 |
| Regulator Ground | GND | 6 |
* Pin is redundant in theory, since it is grounded through the regulator.
** The CCS811B requires a grounded wake pin to operate.
| Item | L293 Pin |
|---|---|
| Battery Positive | 8 |
| Battery Negative | 12 |
| Left Motors | 3, 6 |
| Right Motors | 11, 14 |
Pins 4, 5, 13, 12 are all ground and therefore interchangeable, but I used the ones mentioned.
| LED | Minimum Resistor | Used Resistor |
|---|---|---|
| White 5mm LED | 3R3 | 3R3 |
| Yellow 5mm LED | 50R | 51R |
| White 5mm Cree LED | 3R3 | 3R3 |
| Red 5mm Cree LED | 40R | 43R |
Calculate the minimum required series resistor using (Vs-Vf)/If or using a calculator.
The battery was also hooked up to the input of the 5v regulator, in order to power the Raspberry Pi.
This project is licensed under the terms of the MIT license.