2 layers167.9 × 105.9 mm
2 layers40 × 25 mm
Okgo2usbcontrol
cuspaceflight/OkGo3Rocket motor ignition and valve control from far, far away
- Size
- 40 × 25 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 22
- Nets
- 48
- Pads
- 115
- Tracks, vias
- 0, 0
- Routed
- Not yet
- KiCad
- KiCad 4
- Created
- 25 Nov 2012
- Updated
- 31 Aug 2017
Overview
Okgo2usbcontrol is an open-source printed circuit board by cuspaceflight, from the cuspaceflight/OkGo repository on GitHub. It is a 2-layer board of 40 × 25 mm with 22 parts on 48 nets.
It is built around the STM32F042K6T6 and RFM95W. Its parts include 9 capacitors, 3 resistors, 3 ICs, 3 connectors and 2 diodes. It belongs with the STM32 boards of this library.
Main components
2README
README.mdOkGo
OkGo is Cambridge University Space Flight's rocket firing controller.
OkGo was designed for testing the Quasar hybrid rocket motor. It allowed remote (over 100m of wire) control of the nitrous oxide valve and firing of the ignition e-match. It was constructed using an ad-hoc point-to-point layout. An entirely passive design, it simply uses mechanical switches to trigger relays. It was later upgraded to control two valves, one of which passed a low flow of nitrous oxide to help start the motor.
OkGo 2 was a full redesign for the launch of Martlet 2. Due to the increased safety radius (on the order of 500m) radio control is to be used. It will have 4 general purpose (valve or e-match) channels with independent continuity checking and firing, and separate firing boxes containing current limiting resistors.
OkGo 3 is another full redesign for the launch of Martlet 3. It will continuity check and ignite a single channel with a constant-current drive. Ignition and control will be small and light for portability.
Parts
22| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 100n | agg:0603 | C4, C6, C9 |
| 3 | 1u | agg:0603 | C1, C5, C7 |
| 2 | 10k | agg:0603 | R1, R2 |
| 1 | 10n | agg:0603 | C2 |
| 1 | 10u | agg:0603 | C8 |
| 1 | 4u7 | agg:0603 | C3 |
| 1 | ADP3335 | agg:MSOP-8 | IC1 |
| 1 | ARM | footprints:JSX08001SAQNL | SW2 |
| 1 | COAX | agg:SMA-EDGE | P3 |
| 1 | ESD_DIODE | agg:0603 | D2 |
| 1 | FIRE | footprints:FSM2JSMx | SW1 |
| 1 | LED_bicolour | agg:0805-LED | D1 |
| 1 | R | agg:0603 | R3 |
| 1 | RFM95W | footprints:RFM95W | U1 |
| 1 | STM32F042K6T6 | agg:LQFP-32 | IC2 |
| 1 | SWD_TC | agg:TC2030-NL | P2 |
| 1 | USB-A | footprints:USB-A_M_Edge | P1 |
Questions
How big is the Okgo2usbcontrol PCB?
It measures 40 × 25 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Okgo2usbcontrol use?
22 parts, built around the STM32F042K6T6 and RFM95W. 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 Okgo2usbcontrol KiCad files?
From the cuspaceflight/OkGo repository on GitHub, at the commit this page was made from: the board is okgo2usbcontrol/board/okgo2usbcontrol.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Okgo2usbcontrol design in my own project?
Its repository states no licence, so its author keeps all rights: ask cuspaceflight before reusing the design.
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