2 layers32.5 × 61.8 mm
2 layers32.8 × 89.2 mm
CutdownMechanism v2
crnicholson/Cutdown-Mechanism2Cutdown mechanism for StratoSoar.
- Size
- 32.8 × 89.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 20
- Nets
- 41
- Pads
- 93
- Tracks, vias
- 220, 16
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 2 Mar 2024
- Updated
- 24 May 2024
Overview
CutdownMechanism v2 is an open-source printed circuit board by crnicholson, from the crnicholson/Cutdown-Mechanism repository on GitHub. It is a 2-layer board of 32.8 × 89.2 mm with 20 parts on 41 nets, routed with 220 tracks and 16 vias.
It is built around the NEO-6M and BME280. Its parts include 5 connectors, 2 switches, 1 resistor and 1 IC. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
2README
README.mdCutdown Mechanism
This cutdown mechanism is for a high-altitude glider, named StratoSoar. It is for releasing the glider from the high-altitude balloon payload, so it can fly down to the ground.
Components
The cutdown mechanism consists of a few basic components, all easy to get and cheap.
- The PCB (more on this later).
- A SG90 standard blue servo.
- Arduino Nano.
- BME280 breakout board.
- A variety of headers.
- 9V battery clip.
- 9V battery.
- SPDT breadboard switches.
- One 10 K resistors.
- One standard 6 mm button.
Tools
PCB
3D Printing
Assembly
Usage
Funding
SratoSoar currently has very limited funding to complete this project. We would love any outside support we could get to elevate (no pun intended) this project to the next level. Reach out to me if you have interest at:
- newbsballoons@gmail.com (organization email, recommended).
- charlienicholsonr@gmail.com (personal email).
Still Have Questions?
Do you have any questions? Are the docs incomplete and you want to ask anything? Do you just want to say hi?
Reach out to me at charlienicholsonr@gmail.com.
License
Both the software and documentation are under the GNU GPL v3 license. The hardware and the 3D files are under the CERN Open Hardware Licence Version 2 - Strongly Reciprocal. The media will be licensed under the CC BY 4.0 DEED.
Parts
20| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | MountingHole | MountingHole:MountingHole_2.2mm_M2 | H1, H2, H3, H4, H5, H6 |
| 1 | 10K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1 |
| 1 | 9V | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | BT1 |
| 1 | Ai-Thinker-Ra-02 | RF_Module:LoRa module | U1 |
| 1 | Arduino_Nano_v3.x | Module:Arduino_Nano | A1 |
| 1 | BME280 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J4 |
| 1 | BUTTON_EN | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1 |
| 1 | GPIO | Connector_PinHeader_2.54mm:PinHeader_1x11_P2.54mm_Vertical | J3 |
| 1 | LOGO | LOGO | G*** |
| 1 | NEO-6M | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J5 |
| 1 | Power | Button_Switch_THT:SW_SPDT | SW1 |
| 1 | SW_EN | Jumper:SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm_NumberLabels | JP2 |
| 1 | SW_Push_Open_Dual | Button_Switch_THT:SW_PUSH_6mm | SW2 |
| 1 | Servo 1 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J1 |
| 1 | Servo 2 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J2 |
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Questions
How big is the CutdownMechanism v2 PCB?
It measures 32.8 × 89.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the CutdownMechanism v2 use?
20 parts, built around the NEO-6M and BME280. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the CutdownMechanism v2 KiCad files?
From the crnicholson/Cutdown-Mechanism repository on GitHub, at the commit this page was made from: the board is PCB + Schematic/Cutdown Mechanism Rev 1/cutdownMechanism v2.kicad_pcb and its schematic PCB + Schematic/Cutdown Mechanism Rev 0/cutdownMechanism.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the CutdownMechanism v2 design in my own project?
Its repository states no licence, so its author keeps all rights: ask crnicholson before reusing the design.