This quadcopter was built by 4 sophomores at Olin College of engineering for a class called Principles of Engineering.
For more information see http://poe.olin.edu/poe2013/s_engr2210-quadcopter/ .
Initial RC controlled flight testing:
Step 1: Materials
The sheet we we used was 32"x20" with a thickness off around 4.1mm. A large clean box should do.
Motors from Hobby King, 4x + Propeller clamps,
We used Turnigy D3530/14 1100KV Brushless Outrunner Motor at $14.56 each. Our motors also came with propeller clamps which allowed us to easily connect our propellers to the motors.
Electronic Speed Controllers (ESC) from Hobby King, 4x,
We used TURNIGY Plush 18 amp Speed Controller at $11.90 each.
Propellers from GWS props, 2x counterclockwise rotating, 2x clockwise
We used 3 bladed 8x4x3 GWS props at $2.00 each.
Flight Controller from Hobby King, 1x
We used HobbyKing Multi-Rotor Control Board V2.1 at $12.99
Flight Controller Mounting Pads from Hobby King,
We got a pack of Gyro / Flight Controller Mounting Pad at $1.99 but one can also use double sided tape.
RC Receiver from amazon.com, 1x,
We got a CSRC-RX3000 Spektrum DSM2 Compatible 2.4Ghz 6-Ch Receiver on sale for $9.99. Any 5 or more channel receiver will do though.
Foam block, cut into 4 2 inch by 4 inch chunks,
Used for a more durable landing.
Cyanoacrylate based glue,
Anything will work, the thicker the glue, the easier it is to work with. We used something along the lines of this.
We used duct tape for mounting the foam landing pads as well as for low force attachment of electronics.
Nuts and bolts, 16x sets of 1 nut and 1 bolt,
Washers can be used when directly bolting to cardboard, but we found that you did not really need them. We used 4-40 x 5/8 inch nuts and matching bolts.
0.1mF capacitor, 1x
Used in the low pass filter before the Schmitt trigger.
7.87kΩ resistor, 1x
Used in the voltage divider.
8.2kΩ resistor, 1x
Used in the low pass filter.
453Ω resistor, 1x
Used in the voltage divider.
Operational Amplifier (LMC6484) , 1x
Used to create the Schmitt trigger.
Quad 2-Input Mux (74HC157N) from Digikey, 1x
Used to switch between the RC receiver and Raspberry Pi signal.
Section of perf-board
Used to solder the entire switch circuit in a condensed form for the quadcopter.
Battery from Hobby King, 1x
We used Turnigy nano-tech 3300mah 3S 25~50C Lipo Pack at $26.72.
Battery indicator, 1x
This device changes color and beeps if the batter is at low voltage. This is a must have if you don't want to keep breaking batteries. We used a 3 Cell Hobby King Battery Monitor at $3.99.
BEC from Hobby King, 1x,
This is used to power the Raspberry Pi. We used HobbyKing Micro UBEC 3A / 5v at $3.77.
Servo Connectors, female to female from Hobby King, 4x,
We got a pack of 5 female female from hobby king at $1.65 that we cut in half.
Power Wire, 2x 6 inches high current pieces,
We used 10 AWG red and black that can be bought from hobby king at for $2.99 a meter.
4mm Bullet Connectors, at least 1 male and 1 female.
Casing is nice, so we would suggest HXT 4mm Gold Connector w/ Protector at $3.64.
3.5mm Bullet Connectors, at least 12x
Available in packs of 10 from hobby king for $1.59.
Raspberry Pi, 1x,
We used one of the older model B with 256mb of ram for $35.00. A model A would work and probably better for $25. They are currently hard to buy, you could place an order from a vendor on their site and wait a few months, or just get one from Amazon.
Web Camera from amazon.com, 1x,
Really any usb webcam with linux support will work. We used Microsoft-LifeCam-VX-5000 for $12.74.
Wifi Card from amazon.com, 1x,
Any linux supported wifi card should work. We used this card at $13.06.
SD Card, 1x,
We used a 16gb card from amazon at $11.52.
Micro usb cable, 1x,
It does not need to be long, we used a six inch cable at $3.09.
AVR Programming device one from Hobby King, 1x
We first got USBasp AVR Programming Device for ATMEL processors at $4.95. Our board was defective, so we ended up using a Atmel AVRISP mkII In-System Programmer at $34
RC Transmitter, 1x
We used the highly overkill DX8 8CH Transmitter at $429.99. All you really need is 5 or more channels.
3 cell Lipo Battery Charger + Power supply, 1x,
Some way to charge your battery.