Quantity   Component name
1 × arduino pro mini Lightweight Arduino.
1 × GY-51 Invensense MPU6050 based Accel + Gyro. Easily available on Ebay.
1 × HC-06 Bluetooth Dongle From Ebay. Serial to Bluetooth adapter
1 × 1 recycled quad frame Recovered from a toy quadCopter of younger sibling.
1 × IRFZ44 Discrete Semiconductors / Power Transistors and MOSFETs
1 × 3v to 5V boost regulator From Ebay. The whole system is run from a 3.7volt Lithium battery.
1 × 3.7v high speed DC motors From Ebay. Engine to my quadX
1 × Slide ON/OFF Switch To turn on/off power to rotors.