2 layers48 × 75 mm
2 layers48 × 75 mm
Gps node
ttnmapper/ttntrackernode13GPS Tracker device
- Size
- 48 × 75 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 69
- Nets
- 44
- Pads
- 292
- Tracks, vias
- 770, 233
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 9 Dec 2017
- Updated
- 8 Nov 2021
Overview
Gps node is an open-source printed circuit board by ttnmapper, from the ttnmapper/ttntrackernode repository on GitHub. It is a 2-layer board of 48 × 75 mm with 69 parts on 44 nets, routed with 770 tracks and 233 vias.
It is built around the ATMEGA32U4-AU, TLV71333PDBV and NFM21HC105R1C3D. Its parts include 21 capacitors, 16 connectors, 15 resistors, 6 ICs and 6 diodes. It belongs with the radio and wireless boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
3
ATMEGA32U4-AU
QFP-44(10x10)-40℃~+85℃ 10bit 16MHz 1KB 2.5KB 2.7V~5.5V 26 32KB 8 Bit AVR Built-in FLASH QFP-44(10x10) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
TLV71333PDBV
SOT-23-5-40℃~+125℃@(Tj) 1 150mA 230mV@(150mA) 3.3V 5.5V 50uA 55dB@(1MHz)、70dB@(100Hz) 55uVrms Fixed Positive Under Voltage Lockout、Over Current Protection、Over Temperature Protection、Enable SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTexas InstrumentsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
NFM21HC105R1C3D
SMD-4P,2x1.2mm-55℃~+125℃ 16V 1uF 20mΩ 4A ±20% SMD-4P,2x1.2mm Feed Through Capacitors ROHSMurataFeed Through Capacitors
README
README.mdTTN Tracker
The TTN Tracker is a Things Network node with a gps, used to map out coverage on TTN Mapper. The device is aimed at end users, but can also be reprogrammed by more advanced users.
Thisrepository contains the schematics used to create the device as well as any additional files and the firmware that was loaded on the device.
Schematics
The schematics were created using KiCad 4.0.7
Datasheets
These are links to the datasheets of important components used in the design.
- ATMEGA32U4 - Main Microcontroller
- RN2483 - LoRa Module
- UBlox Cam M8Q - GPS Alternate datasheet
- MMA8452Q - Accelerometer
- MCP73831 - LiPo Battery Charge management
- TLV71333PDBV - 3.3v Regulator
Parts
69| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | 100nF | Capacitors_SMD:C_0805 | C4, C7, C8, C9, C10, C11, C12, C13, C17, C20, C21 |
| 4 | 10k | Resistors_SMD:R_0805 | R1, R6, R10, R11 |
| 4 | 470 | Resistors_SMD:R_0805 | R12, R13, R17, R18 |
| 4 | Mounting Hole | Mounting_Holes:MountingHole_3.2mm_M3_ISO14580_Pad | J1, J2, J3, J4 |
| 3 | 4.7uF | Capacitors_SMD:C_0805 | C3, C5, C6 |
| 2 | 100k | Resistors_SMD:R_0805 | R15, R16 |
| 2 | 22 | Resistors_SMD:R_0805 | R4, R5 |
| 2 | 220 | Resistors_SMD:R_0805 | R2, R3 |
| 2 | 22pF | Capacitors_SMD:C_0805 | C14, C15 |
| 2 | BAS K73 | Diodes_SMD:D_SOT-23_ANK | D1, D2 |
| 2 | LED | LEDs:LED_0805 | D5, D6 |
| 2 | LED_Small_ALT | LEDs:LED_0805 | D3, D4 |
| 2 | NFM21HC105R1C3D | gps_node_components:C_FEEDTHROUGH_0805 | C1, C19 |
| 2 | TLV71333PDBV | TO_SOT_Packages_SMD:SOT-23-5 | U1, U3 |
| 1 | 10uF | Capacitors_SMD:C_1206 | C2 |
| 1 | 10uF | Capacitors_SMD:C_0805 | C18 |
| 1 | 16MHz | gps_node_components:QC3CA_16MHz | Y1 |
| 1 | 1uF | Capacitors_SMD:C_0805 | C16 |
| 1 | 2k | Resistors_SMD:R_0805 | R14 |
| 1 | ATMEGA32U4-AU | Housings_QFP:TQFP-44_10x10mm_Pitch0.8mm | U4 |
| 1 | AVR ICSP | Pin_Headers:Pin_Header_Straight_2x03_Pitch2.54mm | J11 |
| 1 | FW_UPDATE | Pin_Headers:Pin_Header_Straight_1x06_Pitch2.54mm | J16 |
| 1 | LIPO_BAT | Connectors_Molex:Molex_PicoBlade_53047-0210_02x1.25mm_Straight | J13 |
| 1 | MCP73831/2 | TO_SOT_Packages_SMD:SOT-23-5 | IC1 |
| 1 | MODE | Buttons_Switches_SMD:SW_SPST_PTS645 | SW3 |
| 1 | Polyfuse | gps_node_components:bourns polyfuse | F1 |
| 1 | RESET | Buttons_Switches_SMD:SW_SPST_PTS645 | SW2 |
| 1 | RN2483 | drawn_by_jpmeijers:RN2483 | U5 |
| 1 | RS stock no. 448-0747 | Pin_Headers:Pin_Header_Straight_1x03_Pitch2.54mm | SW1 |
| 1 | SOLAR | Connectors_Molex:Molex_PicoBlade_53047-0210_02x1.25mm_Straight | J14 |
| 1 | TEST Vbatt | Socket_Strips:Socket_Strip_Straight_1x01_Pitch2.54mm | J5 |
| 1 | Test 3.3v | Socket_Strips:Socket_Strip_Straight_1x01_Pitch2.54mm | J7 |
| 1 | Test Gnd | Socket_Strips:Socket_Strip_Straight_1x01_Pitch2.54mm | J8 |
| 1 | Test V_bak | Socket_Strips:Socket_Strip_Straight_1x01_Pitch2.54mm | J9 |
| 1 | UART GPS | Pin_Headers:Pin_Header_Straight_1x03_Pitch2.54mm | J15 |
| 1 | UART RF | Pin_Headers:Pin_Header_Straight_1x03_Pitch2.54mm | J12 |
| 1 | USB_OTG | gps_node_components:Molex_Microusb | J6 |
| 1 | u.FL connector | gps_node_components:CONN-RF-UFL | J17 |
| 1 | ublox-cam-m8q-0 | drawn_by_jpmeijers:ublox-cam-m8q-0 | U2 |
Questions
How big is the Gps node PCB?
It measures 48 × 75 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Gps node use?
69 parts, built around the ATMEGA32U4-AU, TLV71333PDBV and NFM21HC105R1C3D. 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 Gps node KiCad files?
From the ttnmapper/ttntrackernode repository on GitHub, at the commit this page was made from: the board is schematic/v2/gps_node.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Gps node design in my own project?
Its repository states no licence, so its author keeps all rights: ask ttnmapper before reusing the design.
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