Cansat

Introduction

Cansat Finland 2022 by Esero Finland: https://www.esero.fi/cansat2022

• https://www.esero.fi/cb7-etusivu
• https://docs.google.com/document/d/1bruEN23qnMu5oZSze9UNT5XXQ5hISCS8Bi35CEtzGw4/edit

Cansat ver 3.20 https://esero.no/wp-content/uploads/2016/02/The-CanSat-Book-R2.13.pdf includes a list of pins. The Norwegian page https://www.narom.no/undervisningsressurser/the-cansat-book/introduction-to-cansat/ is rather comprehensive.

The Instructables portal has a page or two on Cansat, see

• https://www.instructables.com/CanSat-Beginners-Guide/
• http://www.stensat.org/docs/cansat_lessons.pdf
• https://www.slideshare.net/wenjiun/sl-14777621

See Cansat 2021-2022 to some data and files.

Some publications:

• https://www.researchgate.net/publication/261210334_Model_satellite_design_for_CanSat_Competition
• https://www.researchgate.net/publication/325388316_CanSat_design_and_their_applications

Theory -- Cansat Tutorial

This uses the Cansat shield made by Narom, Andøya Space Center. See constructing the cansat shield for more information about the shield. This intro is for version number 7, but I assume that all versions are about the same.

This will contain some simple introductory videos that will guide you through the beginning of Cansat. First, we will guide the soldering process, and then briefly introduce the programming part by part.

Materials

All material (except for the third mission) is included in the Cansat shield. We need

• Arduino
• Circuit Board (cansat shield)
• USB Cable for programming
• Antenna
• Battery connector
• Data logger (SD Card reader)
• Male pin connectors
• Temperature sensor (NTC)
• 10 KΩ Resistor for T sensor
• Header Sockets
• Dip jumpers
• GY-91 10 DOF MPU
• APC 220 Radio
• Usb Connector for radio
• And solder, soldering iron and soldering stand.

Building

See the Finnish version at https://www.esero.fi/cb7-sivu5. Below is a short version.

1. Connect the Arduino to the circuit board
   1. Cut the male pins (lengths 6, 8, 8, 10)
   2. Insert the pins into Arduino
   3. Put the circuit board into its place.
   4. Solder the pins to the circuit board.
2. Connect the jumper pins to the circuit board
   1. Cut the male pins (lengths 2, 4, 5, 5)
   2. Insert pins into positions J1-J5, J7 and J8.
   3. Solder the pins to the circuit board. Use the dip jumpers to fix pins to their positions.
3. Connect the GY-91 to the circuit board
   1. Insert the 8-length pin into the correct position
   2. Solder the pins to the circuit board and GY-91 to the pins. Use Blu Tack or similar to make it stationary.
4. Connect the data logger to the circuit board
   1. Cut the male pin (length 6).
   2. Solder everything into their position.
5. Connect the NTC thermometer
   1. Solder the 10 kΩ resistor
   2. Solder the NTC. Perhaps you should use longer wires.
6. Connect the radio using the header sockets
   1. Solder the large socket
   2. Solder the small socket. It is used to keep the radio on its place.
   3. Solder the 2-length male pin to the radio
7. Connect the battery. Check the correct polarity from the Arduino. You should use some hot glue or similar to reduce the forces on the soldering.

Below is some older data.

• Temperature sensor NTCLE100E3103JB0
  • Resistor 10 kOhm.
• GY-91 (BMP-280, MPU-9255)

Or

• MPX4115a
• LM35DZ
• NTC
• GPS Module
• Anything else

Parachute

Vähimmäislaskeutumisnopeus: 8 m/s Enimmäislaskeutumisnopeus: 11 m/s Sallittu massa: 300–350 g ilmanvastuskertoimet:

• Puolipallon muotoinen: 1,5
• Ristin muotoinen: 0,8
• Liitovarjo: vaihtelee muodon mukaan (voidaan määrittää testeillä)
• Tasainen, kuusikulmainen: 0,8

http://www.nakka-rocketry.net/paracon.html

Terminaalinopeudessa eli tasaisessa nopeudessa gravitaatiovoima on sama kuin laskuvarjon hidastusvoima.

$G=mg={\frac {1}{2}}C_{d}\rho Av^{2}$

Puolipallo/ ellipsi

Risti

Liitovarjo

Tasainen kuusikulmainen

Pyörivä

Tom stanton

Some code

https://github.com/markkuleino/Arduino