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4 layers85 × 68 mmFMRC, the printed circuit board in 3D

FMRC

svenssonjoel/FMRC1

Four Motor Robot Controller

Full screenGitHub.kicad_pcb
Size
85 × 68 mm
Copper layers
4
Thickness
1.6 mm
Parts
107
Nets
153
Pads
502
Tracks, vias
1,700, 359
Pours
25
Routed
Yes
KiCad
KiCad 5 (file 20191123)
Created
7 Jan 2019
Updated
12 Feb 2020

Overview

FMRC is an open-source printed circuit board by svenssonjoel, from the svenssonjoel/FMRC repository on GitHub, published under the GPL-3.0 licence. It is a 4-layer board of 85 × 68 mm with 107 parts on 153 nets, routed with 1,700 tracks and 359 vias.

It is built around the BMD-340-A-R, DRV8848PWP and ADP2303ARDZ-5.0, with the BMI160, TJA1051TK/3/1 and SSB43L-E3 among its other parts. Its parts include 36 capacitors, 22 resistors, 7 ICs, 7 diodes and 2 transistors. It belongs with the robots and motor control boards and the STM32 and nRF52 and nRF5x boards of this library.

Main components

6

README

README.md

FMRC (Work in progress)

Four Motor Robot Controller.

General videos

FMRC: UART communication between NRF52 and STM32!

Firmware

STM32F4

  • Work in progress

NRF52

  • TODO Start

  • PROGRAMMING NRF52 stlink: openocd -f interface/stlink.cfg -f target/nrf52.cfg

telnet localhost 4444

reset program zephyr.hex verify

V1_0

Hardware

Image of FMRC v1.0

Schematics of FMRC v1.0

whatgoeswhere FMRC v1.0

PCBs arrived

Top view of FMRC v1.0

Bottom view of FMRC v1.0

Ready to start testing

Populated board FMRC v1.0

V2_0

Work on version 2.0 is in progress.

FMRC V2 PART 14: First draft of completely routed PCB

FMRC V2 PART 13: More routing -- finishing off at the DRV8848 area

FMRC V2 PART 12: Starting to route in the DRV8848 area

FMRC V2 PART 11: More PCB routing

FMRC V2 PART 10: Started routing

FMRC V2 PART 9: Tightening up the placement of components

FMRC V2 PART 8: Roughly sorting components

FMRC V2 PART 7: placing components focusing on the DC-DC area

FMRC V2 PART 6: Boot modes and Boot-loader that allows USB flashing

FMRC V2 PART 5: Adding an audio jack and doing some spice simulation in KiCAD

FMRC V2 PART 4: Servo outputs may be nice to have and finishing off in preparation for routing

FMRC V2 PART 3: Out with the old, in with the new (and some confusion about pins with no net!)

FMRC V2 PART 2B: Adding some caps and experimenting some more with kicad hierarchical labels

FMRC V2 PART 2: Adding DRV8847 chips and trying out KICADs hiearchical labels

FMRC V2 PART 1: new 5V regulator that can do 3A

Parts

107
QtyValueFootprintReferences
202.2uCapacitor_SMD:C_0603_1608MetricC1, C2, C4, C5, C11, C13, C14, C15, C16, C17, C19, C22, C23, C26, C33, C34 +4
61kResistor_SMD:R_0603_1608MetricR1, R2, R4, R5, R15, R16
510kResistor_SMD:R_0603_1608MetricR7, R8, R9, R10, R13
4Mounting_HoleMountingHole:MountingHole_3.2mm_M3MK1, MK2, MK3, MK4
3100uFCapacitor_THT:CP_Radial_D10.0mm_P5.00mmC20, C29, C31
310uFCapacitor_SMD:C_1206_3216MetricC18, C24, C30
3220RResistor_SMD:R_0603_1608MetricR3, R19, R20
2100nCapacitor_SMD:C_0603_1608MetricC10, C21
210uFCapacitor_SMD:C_0805_2012MetricC27, C28
215pCapacitor_SMD:C_0603_1608MetricC3, C12
222RResistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolderR21, R22
222RResistor_SMD:R_0603_1608MetricR14, R18
247uFCapacitor_THT:CP_Radial_D6.3mm_P2.50mmC32, C36
2DRV1_MTR1TerminalBlock_Phoenix:TerminalBlock_Phoenix_PT-1,5-2-5.0-H_1x02_P5.00mm_HorizontalDRV1_A, DRV2_A
2DRV1_MTR2TerminalBlock_Phoenix:TerminalBlock_Phoenix_PT-1,5-2-5.0-H_1x02_P5.00mm_HorizontalDRV1_B, DRV2_B
2DRV8848Package_SO:TSSOP-16-1EP_4.4x5mm_P0.65mmU5, U10
2D_SchottkyDiode_SMD:D_SMBD6, D7
2GREENLED_SMD:LED_0603_1608MetricD2, D4
2Q_NMOS_GSDPackage_TO_SOT_SMD:SOT-23Q1, Q2
2REDLED_SMD:LED_0603_1608MetricD1, D3
2USB_B_MiniConnector_USB:USB_Mini-B_Lumberg_2486_01_HorizontalUSB NRF, USB STM
10.1uFCapacitor_SMD:C_0603_1608MetricC35
1100kResistor_SMD:R_0603_1608MetricR17
1100uCapacitor_Tantalum_SMD:CP_EIA-3528-12_Kemet-TC25
112kResistor_SMD:R_0603_1608MetricR12
122UInductor_SMD:L_Taiyo-Yuden_MD-5050L1
133kResistor_SMD:R_0603_1608MetricR6
14,7uHInductor_SMD:L_Vishay_IHLP-2525L3
156kResistor_SMD:R_0603_1608MetricR11
18MCrystal:Crystal_SMD_5032-4Pin_5.0x3.2mmY1
1ADP2303ARDZ-5.0Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mmU9
1AudioJack3_Groundv2_0:Jack_3.5mm_CUI_SJ-3524-SMT_HorizontalAUDIO
1BMD-340-A-Rv2_0:RIGADO_BMD-340-A-RBLE
1BMI160Package_LGA:Bosch_LGA-14_3x2.5mm_P0.5mmU3
1BOOT0Button_Switch_SMD:SW_SPDT_PCM12SW3
1CANConnector_JST:JST_PH_B4B-PH-K_1x04_P2.00mm_VerticalCAN
1DACConnector_JST:JST_PH_B3B-PH-K_1x03_P2.00mm_VerticalDAC
1MCP16311/2Package_SO:MSOP-8_3x3mm_P0.65mmU4
1MCU_USB_POWERButton_Switch_SMD:SW_SPDT_PCM12USB POWER
1MTR1_CONConnector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_VerticalJ19
1MTR2_CONConnector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_VerticalJ7
1NRFGPIOConnector_JST:JST_PH_B8B-PH-K_1x08_P2.00mm_VerticalNRF GPIO
1NRFSWDConnector_JST:JST_PH_B6B-PH-K_1x06_P2.00mm_VerticalSWD NRF
1NRF_USB_POWERButton_Switch_SMD:SW_SPDT_PCM12USB POWER
1PWRConnector_JST:JST_PH_B4B-PH-K_1x04_P2.00mm_VerticalPOWER
1Power_terminalTerminalBlock_Phoenix:TerminalBlock_Phoenix_PT-1,5-2-5.0-H_1x02_P5.00mm_HorizontalBAT_IN
1SERV1Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_VerticalSERVO1
1SERV2Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_VerticalSERVO2
1SPIConnector_JST:JST_PH_B6B-PH-K_1x06_P2.00mm_VerticalSPI
1SSB43LDiode_SMD:D_SMBD5
1STM32F40X_LQFP64Package_QFP:LQFP-64_10x10mm_P0.5mmU2
1SWDConnector_JST:JST_PH_B6B-PH-K_1x06_P2.00mm_VerticalSWD STM
1TJA1051TK-3v2_0:DFN-8-1EP_3x3mm_P0.65mm_EP1.55x2.4mmU1
1UART5Connector_JST:JST_PH_B4B-PH-K_1x04_P2.00mm_VerticalUART5
1USART3_UART4Connector_JST:JST_PH_B4B-PH-K_1x04_P2.00mm_VerticalUART
1USB_AConnector_USB:USB_A_Stewart_SS-52100-001_Horizontal5V OUTPUT

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Questions

How big is the FMRC PCB?

It measures 85 × 68 mm and has 4 copper layers, 1.6 mm thick.

What parts does the FMRC use?

107 parts, built around the BMD-340-A-R, DRV8848PWP, ADP2303ARDZ-5.0 and BMI160. 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 FMRC KiCad files?

From the svenssonjoel/FMRC repository on GitHub, at the commit this page was made from: the board is hardware/v2_0/v2_0.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the FMRC design in my own project?

Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).