Quantity   Component name
1 × Arduino pro-mini clone
1 × L293D motor driver IC
1 × 10K POT with Knob
1 × 4 leds
1 × 2 tactile switches
1 × Barrel Jack
1 × 1 Plastic box
1 × Couple of resistors for biasing leds
1 × Shunt resistor I used 80milliohm but even lower is fine as long as arduino ADC can read the current of 1.2A across it with sufficient accuracy.