This page gives an overview about the required components and lists advantages and disadvantages for each of them. 

Also included must be:

• prize
• power consumption
• size and weight
• possibly required modules or connectors for the micocontroller communication
  
  
• if nessecary: a circuit plan (created with Eagle)

Frame

DJI FlameWheel F450

• Cost: 169€
• Size: 450mm Diagonal
• Weight frame alone: 282g
• Takeoff Weight: 800g-1200g (1600g? Depending on sources)
• Will need cable ties
• Power distribution board already built in
• Propellers included

Microcontroller

Arduino Mega 2560

Links: store.arduino.cc/product/A000067  

http://www.arduino.cc/en/Main/ArduinoBoardMega2560

General Informations:

• 16 MHz

Price: 17,99 €

Battery

3S will presumably be enough
For weight reasons: probably ca. 2000mAh?

Weight: 162g
Price: 28,16€
Output: 11,1V

2 x http://www.hobbyking.com/hobbyking/store/__17286__Turnigy_nano_tech_2000mah_3S_15_25C_Lipo_AIRSOFT_Pack.html

--> Voltage Controller (e.g. IC7805) required, probably multiple? Low cost, Arndt will bring some, maybe we can buy them off him, if he doesn't mind?
--> May need some that are lossless? -> mc35063 but higher cost!
--> Some people say we will need a step down module, because Voltage Controllers will offer too much variation in their voltage/current: http://www.electrodragon.com/product/lm2596s-adj-dc-dc-small-tiny-adjustable-step-down-module-3-40vin-1-5-35vout/ is recommended, but only outputs 3A?

==> Need a lot more information, might look into it more tomorrow?

LiPo-Warners

Connection to the microcontroller will have to be done by ourselves. So I don't know how many pins we might need. Will have to talk to someone who might know more, internet doesn't really give much insight. Maybe I'll make a post about it somewhere?

Links: Amazon

Cost: 7€

weight: 9g

Motors

DJI Motor 2212/920 rpm/V

• Voltage: 11,1 bis 14,4V
• Standard Current: 15-25A
• Max Current: 30A
• Required Batteries: 3S-4S LiPos
• Weight: 56g each (including Propeller Adapter)

Calculation Site: http://www.ecalc.ch/xcoptercalc.php?ecalc&lang=de

In case this helps anyone...I don't think my calculations were correct so it didn't help me much

Electronic Speed Controller (ESC)

DJI Brushless Regler 30A OPTO (?)

• Voltage: 6-16.8V
• Connects to a receiver -> Might need to reverse engineer that thing or the cable, don't know much about that
• Orange Cable carries signal: freq. 30hz-450hz (most people i've seen used 400hz)
• Brown Cable is ground, red one useless apparently

http://wiki.dji.com/en/index.php/ESC

http://www.sarkanyellato.hu/wp-content/uploads/2011/10/RC-Timer-10.18.30.40A-ESC-Instruction.pdf

Replacement parts for Controller/Arms: https://copterdeluxe.com/Multi-Rotor-Copter-Ersatzteile-DJI-Hobby-F450 (Currently not available?)

Gyro & Acceleration Sensors

MPU-9150. All in one kit. Gyro, Acceleration and Compass.
Links: Amazon: http://www.amazon.de/GY-9150-MPU-9150-Achsen-Kompass-Accelerometer-SE05014/dp/B00VRJEA7C/ref=sr_1_1?ie=UTF8&qid=1430578388&sr=8-1&keywords=MPU-9150
          Specification: http://www.invensense.com/mems/gyro/documents/PS-MPU-9150A-00v4_3.pdf
Cost: 20.59€
Operating Voltage Supply: 2.4V-3.46V
Logic Supply Voltage: 1.8V +- 5% or VDD
Communication via I2C-Bus

Proximity Sensors

4-Pin Ultrasonic-Module HC-SR04

Probably we will need 10 of this sensors, but maybe 6 will be enough.

Links: Amazon, datasheet, short instructions

Cost: 10 x approx. 2€ ≈ 20€

Power Supply: +5VDV, 10 x 15mA working current

weght: 8.5g

Pins: 2 GPIO, VCC, GND

• VCC = +5VDC (GPIO)
• Trig = Trigger input of Sensor (5V Digital GPIO)
• Echo = Echo output of Sensor (5V Digital GPIO) 
  Important: Outputs 5V. If the microcontroller can only handle 3.3V inputs, we need to build an easy voltage divider.
• GND = GND (GPIO)

/*
 HC-SR04 Ping distance sensor]
 VCC to arduino 5v GND to arduino GND
 Echo to Arduino pin 13 Trig to Arduino pin 12
 Red POS to Arduino pin 11
 Green POS to Arduino pin 10
 560 ohm resistor to both LED NEG and GRD power rail
 More info at: http://goo.gl/kJ8Gl
 Original code improvements to the Ping sketch sourced from Trollmaker.com
 Some code and wiring inspired by http://en.wikiversity.org/wiki/User:Dstaub/robotcar
 */

#define trigPin 13
#define echoPin 12
#define led 11
#define led2 10

void setup() {
  Serial.begin (9600);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(led, OUTPUT);
  pinMode(led2, OUTPUT);
}

void loop() {
  long duration, distance;
  digitalWrite(trigPin, LOW);  // Added this line
  delayMicroseconds(2); // Added this line
  digitalWrite(trigPin, HIGH);
//  delayMicroseconds(1000); - Removed this line
  delayMicroseconds(10); // Added this line
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance = (duration/2) / 29.1;
  if (distance < 4) {  // This is where the LED On/Off happens
    digitalWrite(led,HIGH); // When the Red condition is met, the Green LED should turn off
  digitalWrite(led2,LOW);
}
  else {
    digitalWrite(led,LOW);
    digitalWrite(led2,HIGH);
  }
  if (distance >= 200 || distance <= 0){
    Serial.println("Out of range");
  }
  else {
    Serial.print(distance);
    Serial.println(" cm");
  }
  delay(500);
}

Radio Telemetry Kit

Aukru HC-06 Wireless 4 Pins Bluetooth RF Transceiver Serial Module

Links: Amazon, instructions, instructions, instructions

Cost: 9€

size: 4.3 * 1.6 * 0.7cm

weight: 9g

Power Supply: 3.3V - 6V, approx. 50mA

Pins: 2 GPIO, VCC, GND

• VCC = +3.3VDC / +5VDC (GPIO)
• TXD = Trigger input of Sensor (RXD (serial) Digital 0)
• RXD = Echo output of Sensor (TXD (serial) Digital 1) 
• GND = GND (GPIO)
  

Price summary

• 253,75€ + Microcontroller
• If we use the Arduino Mega from the office, we won't need any extra cost for the microcontroller