Ultrasonic range finder tutorial - http://www.instructables.com/id/Ultrasonic-Range-detector-using-Arduino-and-the-SR/?ALLSTEPS http://arduinobasics.blogspot.com/2012/11/arduinobasics-hc-sr04-ultrasonic-sensor.html

MPU6050 accelerometer tutorials - http://www.instructables.com/id/Balancing-Instructable-Robot/step10/Connecting-the-MPU6050/  http://diyhacking.com/arduino-mpu-6050-imu-sensor-tutorial/

RC servo tutorials - https://www.arduino.cc/en/Reference/Servo https://learn.adafruit.com/adafruit-motor-selection-guide/rc-servo-control http://www.instructables.com/id/Using-Servos/?ALLSTEPS  https://github.com/maniacbug/rf24  https://arduino-info.wikispaces.com/Nrf24L01-2.4GHz-HowTo

2.4 GHz transceiver tutorials - https://www.youtube.com/watch?v=wlhuO82IZjQ http://www.instructables.com/id/Wireless-Remote-Using-24-Ghz-NRF24L01-Simple-Tutor/