4 layers66 × 90 mm
2 layers114.3 × 67.3 mm
Backdash
PhoenixRacing/Electrical1920Firmware, software, and component design of sensing and computer systems for the 2019-2020 season
- Size
- 114.3 × 67.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 75
- Nets
- 97
- Pads
- 304
- Tracks, vias
- 766, 727
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 5 (file 20190905)
- Created
- 23 Jul 2019
- Updated
- 18 Dec 2019
Overview
Backdash is an open-source printed circuit board by PhoenixRacing, from the PhoenixRacing/Electrical1920 repository on GitHub. It is a 2-layer board of 114.3 × 67.3 mm with 75 parts on 97 nets, routed with 766 tracks and 727 vias.
It is built around the ATMEGA1284-AU, RN4871-V/RM118 and MAX31865AAP+, with the TXB0104D, LM1117-3.3 and LM1117-5.0 among its other parts. Its parts include 19 capacitors, 16 resistors, 6 ICs, 3 connectors and 2 crystals. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
7ATMEGA1284-AU
TQFP-44(10x10)-40℃~+85℃ 1.8V~5.5V 10bit 128KB 16KB 20MHz 32 4KB 8 Bit AVR Built-in FLASH TQFP-44(10x10) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
RN4871-V/RM118
SMD-16P0dBm UART SMD-16P Bluetooth Modules ROHSMicrochip TechnologyBluetooth Modules
MAX31865AAP+
SSOP-20-40℃~+125℃ 1 1.5mA 15 1LSB 3V~3.6V Digital filtering SPI Sensor Conditioner Sigma-Delta SSOP-20 ADCs/DACs - Special Purpose ROHSMaxim Integrated (Analog Devices)Temperature Sensors
TXB0104D
SOIC-14-40℃~+85℃ 1 1.2V~3.6V 1.65V~5.5V 100Mbps 4 Auto Direction Detection Bidirectional CMOS CMOS Tri-State SOIC-14 Translators, Level Shifters ROHSTexas InstrumentsTranslators, Level Shifters
LM1117-3.3
SOT-2231 1.3V@(1000mA) 15V 1A 2mA 3.3V Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHShongjiachengUncategorisedLM1117-5.0
SOT-2231 1.3V@(1000mA) 15V 1A 2mA 5V Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHShongjiachengUncategorised4.7UF 16V
CAP-SMDCASE-A-3216 Tantalum Capacitors ROHSKyocera AVXTantalum Capacitors
README
README.mdElectrical1920
Firmware, software, and component design of sensing and computer systems for the 2019-2020 season
Parts
75| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 1k | Resistor_SMD:R_0402_1005Metric | R4, R5, R7, RP2, RP5, RP6, RP7, RP8, RP10, RP11 |
| 7 | 0.1uF | Capacitor_SMD:C_0402_1005Metric | C2, C9, C10, C11, C12, C13, C14 |
| 6 | 1uF | Capacitor_SMD:C_0603_1608Metric | C1, C3, C6, C7, C15, C16 |
| 5 | 4.7k | Resistor_SMD:R_0402_1005Metric | R2, R3, R6, RP3, RP4 |
| 3 | 10k | Resistor_SMD:R_0402_1005Metric | RP1, RP9, RP12 |
| 3 | TXB0104D | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U3, U4, U5 |
| 2 | , | ||
| 2 | 18pF | Capacitor_SMD:C_0402_1005Metric | C17, C18 |
| 2 | 20pF | Capacitor_SMD:C_0402_1005Metric | C4, C5 |
| 2 | BT_RST | Button_Switch_SMD:SW_SPST_EVQQ2 | BT_RESET, RESET |
| 2 | Green | LED_SMD:LED_0603_1608Metric | 3V3_PWR, 5V_PWR |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric | C19 |
| 1 | 16MHz | Crystal:Crystal_SMD_HC49-SD | Y1 |
| 1 | 1M | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | 32.768 kHz | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y2 |
| 1 | 3V Coin Cell | Battery:BatteryHolder_Keystone_1058_1x2032 | BT1 |
| 1 | 4.7uF_16V | Capacitor_SMD:C_0805_2012Metric | C8 |
| 1 | ATmega1284-AU | Package_QFP:TQFP-44_10x10mm_P0.8mm | MCU1 |
| 1 | BT_PLED | LED_SMD:LED_0603_1608Metric | BT_PWR |
| 1 | BT_TX_LED | LED_SMD:LED_0603_1608Metric | BT_TX |
| 1 | CVT_IR | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | CVT_IR |
| 1 | ICSP | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | ICSP |
| 1 | IMU_bout | baja1920:6dof_MPU6050 | IMU |
| 1 | LF | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J5 |
| 1 | LF_rh | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | LF |
| 1 | LM1117-3.3 | Package_TO_SOT_SMD:SOT-223 | U2 |
| 1 | LM1117-5.0 | Package_TO_SOT_SMD:SOT-223 | U1 |
| 1 | LOGO | baja1920:logo_backdash_back | G*** |
| 1 | LOGO | baja1920:logo_backdash_front | G*** |
| 1 | LR_rh | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | LR |
| 1 | MAX31865 | TestBaja:RTD | RTD |
| 1 | MCP7940N-xSN | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U6 |
| 1 | Micro_SD_Card_Det_Hirose_DM3AT | Connector_Card:microSD_HC_Hirose_DM3AT-SF-PEJM5 | uSD |
| 1 | RF | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J2 |
| 1 | RF_rh | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | RF |
| 1 | RN4871-V/RM118 | RF_Module:Microchip_RN4871 | BLE |
| 1 | RR_rh | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | RR |
| 1 | RWS | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J3 |
| 1 | SPI_CAN_BREAKOUT | TestBaja:CAN_Module | CAN |
| 1 | Tach | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | TACH |
| 1 | Ulti_GPS_v3 | baja1920:UltiGPSv3 | GPS |
| 1 | Vsupply | baja1920:Power | POWER |
Questions
How big is the Backdash PCB?
It measures 114.3 × 67.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Backdash use?
75 parts, built around the ATMEGA1284-AU, RN4871-V/RM118, MAX31865AAP+ and TXB0104D. 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 Backdash KiCad files?
From the PhoenixRacing/Electrical1920 repository on GitHub, at the commit this page was made from: the board is backdash/rev_1.0/rev_1.0.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Backdash design in my own project?
Its repository states no licence, so its author keeps all rights: ask PhoenixRacing before reusing the design.
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