Why not?
+---|EXT|--------|USB|---+
| PWR A5/SCL |
| A4/SDA |
| UNO AREF |
| GND | +-----+
| IOREF SCK/D13 | |SERVO|
| RST DI/D12 | | GND |-------+
| 3V3 DO/D11~|----+ | VCC |-----+ |
+-----| +5V D10~| +-|-------| SIG | | |
| | GND D9~|--+ | +-----+ | |
+-|-----| GND D8 |--+ | +------------+ | |
+-|-|-----| Vin D7 | | +---| ENB L298N | | |
| | | | D6~|--|-----| ENA | | |
| | | | A0 D5~|--|-----| IN1 5V |--+ |
| | | | A1 D4 |--|-----| IN2 GND |--|-+
| | | | A2 INT1/D3 |--|-----| IN4 | | |
| | | | A3 INT0/D2~|--|-----| IN3 | | |
| | | +---| A4/DA RS CK DI TX>D1 | | +------------+ | |
| | | | +-| A5/CL GD D0 5V RX<D0 | | +------------+ | |
| | | | | +------------------------+ +-----| SIG FLAME | | |
| +-|-|-|-----------------------------------| GND SENSOR | | |
| | +-|-|-----------------------------------| VCC | | |
| | | | +---------+ +------------+ | |
+-|---|-|--| 9V PDB | | |
+---|-|--| GND | +------------+ | |
| | +---------+ | MLX90614 | | |
| +-----------------------------------| SCL VCC |--+ |
+-------------------------------------| SDA GND |----+
+------------+