6 layers84 × 50 mm
Solar ribbit
Ribbit-Network/ribbit-network-frog-hardware
The sensor for the world's largest crowdsourced network of open-source, low-cost, GHG Gas Detection Sensors.
171 parts107MIT
4 layers23.2 × 22 mm
Trk nrf
uge/trkThis repo contains a KiCad 8.0 project which hopes to implement a low power tracker for pico-balloons based on the nRF9151 module and a WSPR protocol modulator.
- Size
- 23.2 × 22 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 50
- Nets
- 110
- Pads
- 270
- Tracks, vias
- 602, 151
- Pours
- 170
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 21 Nov 2024
- Updated
- 10 Dec 2024
Overview
Trk nrf is an open-source printed circuit board by uge, from the uge/trk repository on GitHub. It is a 4-layer board of 23.2 × 22 mm with 50 parts on 110 nets, routed with 602 tracks and 151 vias.
It is built around the TPS631010YBGR. Its parts include 16 resistors, 13 capacitors, 4 ICs, 3 inductors and 2 connectors.
Main components
1README
README.mdnrf9151 based picoballoon tracker in kicad
This repo contains a KiCad 8.0 project which hopes to implement a low power tracker for pico-balloons based on the nRF9151 module and a WSPR protocol modulator.
Why the nRF9151?
The nRF9151 is marketed with emphasis on cellular data and GPS capabilities with optimization for power. Trackers are one category of intended applications and the device and software stack have provisions for aggressive power saving modes. Even if the cellular data connectivity feature is not used, the nrf9151 is a power efficient microcontroller with an embedded GPS.
The cellular functionality opens up the possibility of eventually using NTN services such as Skylo or Starlink.
WSPR modulator
The Si5351 is a common frequency synthesizer used to implement the WSPR protocol. This design opts for the TI CDCE6214 in hopes of reducing power consumption and to try something different.
Power conversion
Following the Traquito's example, this design uses buck-boost converters to adapt to varying and lower voltages. This design uses the TI TPS631010 which can operate at input voltages from 1.6V to 5.5V. There are two buck-boost converters for the 1.8V and 3.3V supplies respectively.
Manufacturing
This design is targeted at JLCPCB 4 layer design rules and includes JLCPCB part numbers in the BOM.
License and Copyright
Copyright 2024 - Eugene Feinberg (ugeook at gmail dot com)
Licensed under Creative Commons Attribution-NonCommercial 4.0 International Public License
Parts
50| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 91K | Resistor_SMD:R_0402_1005Metric | R2, R4, R5, R6, R9, R12, R13, R14, R15, R16 |
| 5 | .1uF | Capacitor_SMD:C_0402_1005Metric | C7, C8, C10, C11, C12 |
| 4 | 10 uF | Capacitor_SMD:C_0603_1608Metric | C2, C3, C5, C9 |
| 4 | MountingHole_Pad_MP | MountingHole:MountingHole_2.2mm_M2_ISO7380_Pad | H1, H2, H3, H4 |
| 2 | 1.0uH | Inductor_SMD:L_Murata_DFE201610P | L1, L2 |
| 2 | 47 uF | Capacitor_SMD:C_0805_2012Metric | C1, C4 |
| 2 | NS | Resistor_SMD:R_0402_1005Metric | R7, R8 |
| 2 | TPS631010YBGR | footprints:YBG0008 | U3, U4 |
| 1 | .022 uF | Capacitor_SMD:C_0402_1005Metric | C6 |
| 1 | 0 | Resistor_SMD:R_0402_1005Metric | R11 |
| 1 | 240K | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | 300 | Resistor_SMD:R_0402_1005Metric | R10 |
| 1 | 39pF | Capacitor_SMD:C_0402_1005Metric | C14 |
| 1 | 511K | Resistor_SMD:R_0402_1005Metric | R3 |
| 1 | CDCE6214RGER | footprints:VQFN24_RGE_TEX | U2 |
| 1 | Conn_01x20_Pin | Connector_FFC-FPC:Hirose_FH12-20S-0.5SH_1x20-1MP_P0.50mm_Horizontal | J2 |
| 1 | Conn_02x05_Odd_Even | Connector_PinHeader_1.00mm:PinHeader_2x05_P1.00mm_Vertical_SMD | J1 |
| 1 | GND | TestPoint:TestPoint_THTPad_D1.5mm_Drill0.7mm | TP5 |
| 1 | GPS ANT | TestPoint:TestPoint_Pad_1.5x1.5mm | TP1 |
| 1 | LED | LED_SMD:LED_0402_1005Metric | D1 |
| 1 | LTE ANT | TestPoint:TestPoint_Pad_1.5x1.5mm | TP2 |
| 1 | L_Ferrite | Inductor_SMD:L_0805_2012Metric | L3 |
| 1 | TG2520SMN-xx.xxxxxxMhz-xxxxNM | Oscillator:Oscillator_SMD_SeikoEpson_TG2520SMN-xxx-xxxxxx-4Pin_2.5x2.0mm | X1 |
| 1 | VBUS | TestPoint:TestPoint_THTPad_D1.5mm_Drill0.7mm | TP6 |
| 1 | WSPR _ANT_P | TestPoint:TestPoint_THTPad_D1.5mm_Drill0.7mm | TP4 |
| 1 | WSPR_ANT_N | TestPoint:TestPoint_THTPad_D1.5mm_Drill0.7mm | TP3 |
| 1 | nRF9151-LAXX | PCM_nordic-lib-kicad-nrf9:LGA_9151_12.1x11.1mm | U1 |
Questions
How big is the Trk nrf PCB?
It measures 23.2 × 22 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Trk nrf use?
50 parts, built around the TPS631010YBGR. 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 Trk nrf KiCad files?
From the uge/trk repository on GitHub, at the commit this page was made from: the board is kicad/trk-nrf/trk-nrf.kicad_pcb and its schematic kicad/trk-nrf/trk-nrf.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Trk nrf design in my own project?
Its repository states no licence, so its author keeps all rights: ask uge before reusing the design.
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