2 layers167.9 × 105.9 mm
2 layers
Okgo2mini
cuspaceflight/OkGo3Rocket motor ignition and valve control from far, far away
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 43
- Nets
- 73
- Pads
- 210
- Tracks, vias
- 0, 0
- Routed
- Not yet
- KiCad
- KiCad 5 (file 20170123)
- Created
- 25 Nov 2012
- Updated
- 31 Aug 2017
Overview
Okgo2mini is an open-source printed circuit board by cuspaceflight, from the cuspaceflight/OkGo repository on GitHub. It is a 2-layer board with 43 parts on 73 nets.
It is built around the STM32F051K6T7, TPS62130RGT and BQ24232HARGT, with the RFM95W and PMEG2005AEA among its other parts. Its parts include 17 capacitors, 7 resistors, 6 diodes, 6 connectors and 5 ICs. It belongs with the STM32 boards of this library.
Main components
5
STM32F051K6T7
LQFP-32(7x7)-40℃~+105℃ 12bit 12bit 25 2V~3.6V 32 Bit 32KB 48MHz 8KB ARM Cortex-M0 Built-in FLASH LQFP-32(7x7) Microcontrollers (MCU/MPU/SOC) ROHSSTMicroelectronicsMicrocontrollers (MCU/MPU/SOC)
TPS62130RGT
VQFN-16-EP(3x3)-40℃~+85℃@(TA) 1 17uA 2.5MHz 3A 3V~17V 900mV~6V Adjustable Buck Buck Built-in Yes QFN-16-EP(3x3) DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
BQ24232HARGT
VQFN-16-EP(3x3)-5℃~+125℃ 4.35V 4.35V~10.2V 500mA 6.5uA Charging IC Lithium Battery Support VQFN-16-EP(3x3) Battery Management ROHSTexas InstrumentsBattery ManagementRFM95W
SMD-16PUncategorisedHopeRF Micro-electronics
PMEG2005AEA
SOD-3231 Independent 10A 20V 355mV@500mA 40uA@20V 500mA SOD-323 Schottky Diodes ROHSNexperiaSchottky Diodes
README
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
43| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 10u | agg:0603 | C11, C12, C14, C16, C17 |
| 4 | 100n | agg:0603 | C5, C7, C13, C15 |
| 4 | 1u | agg:0603 | C1, C3, C9, C10 |
| 3 | 4u7 | agg:0603 | C4, C6, C8 |
| 2 | 100k | agg:0603 | R4, R5 |
| 2 | 3k3 | agg:0603 | R6, R7 |
| 2 | ESD_DIODE | agg:0603 | D4, D5 |
| 2 | PMEG2005AEA | agg:SOD-323 | D3, D6 |
| 2 | R | agg:0603 | R2, R3 |
| 1 | 10n | agg:0603 | C2 |
| 1 | 2u2 | agg:XFL4020 | L1 |
| 1 | 4k32 | agg:0603 | R1 |
| 1 | ADP3335 | agg:MSOP-8 | IC3 |
| 1 | ANT | agg:SMA-EDGE | P3 |
| 1 | ARM | agg:0805-LED | D2 |
| 1 | BATT | agg:S03B-PASK-2 | J1 |
| 1 | BQ24232HA | agg:QFN-16-EP-TI | IC1 |
| 1 | CHARGING | agg:0805-LED | D1 |
| 1 | MICROUSB STRAIGHT | okgo2mini:USB_Micro_B_Vertical | J2 |
| 1 | PYRO | agg:S02B-PASK-2 | J3 |
| 1 | RFM95W | okgo2mini:RFM95W | U1 |
| 1 | STM32F051K6T7 | agg:LQFP-32 | IC2 |
| 1 | SWD | agg:FTSH-105-01-F-D-K | P1 |
| 1 | SWD_TC | agg:TC2030-NL | P2 |
| 1 | SWITCH_SPST | okgo2mini:710xxxxV3xx | SW1 |
| 1 | TPS62130 | agg:QFN-16-EP-TI | IC4 |
Questions
What parts does the Okgo2mini use?
43 parts, built around the STM32F051K6T7, TPS62130RGT, BQ24232HARGT 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 Okgo2mini KiCad files?
From the cuspaceflight/OkGo repository on GitHub, at the commit this page was made from: the board is okgo2mini/board/okgo2mini.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Okgo2mini 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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