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Radar MCU

TonyStark2007·GPR_FMCW_SubGHz·Radar MCU/Radar MCU.kicad_pcb

Radar MCU PCB layout, top view — open source STM32 board by TonyStark2007

About the Radar MCU PCB

Radar MCU is an open source STM32 PCB design by TonyStark2007, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 36.9 × 32.9 mm, with 98 components from 35 distinct parts.

Its main chip is the STM32F405, from the STM32 family. Other key parts include the AP3211, LP2985_10, MCP4022_202, LT1817 and MAX1426. By type, the board carries 44 capacitors, 34 resistors, 7 ICs, 4 connectors, 2 transistors and 2 diodes.

From the project

This is an attempt to develop a ground penetrating FMCW radar. The operating range is 100MHz to 1000MHz, central frequency 435MHz. This is work in progress and not yet concrete.

This is an attempt to make a subGHz radar.

STM32F4 has triangular waveform generation option with its DAC and also ADF4158 is used for PLL topology. Either option can be used for waveform generation. Check schematic to populate necessary resistor values to use either mode. ADF4158 can generate pulses with some gap between each sweep. In this way N number of samples are packed and buffered over USB during this gap. Main loop runs with a FSM to check conditions of sweep. ADF4158 Muxout is generating pulse according to the sweep condition. External interrupt tracks this pulse to move between…

Main components on the Radar MCU

AP3211LP2985_10STM32F405MCP4022_202LT1817MAX1426

Radar MCU bill of materials (BOM)

98 components, 35 distinct parts.

QtyPartRefs
2
AP3211
U1, U2
1
LP2985_10
U3
1
STM32F405
U4
1
MCP4022_202
U7
1
LT1817
U8
1
MAX1426
U9
2
BSS138
Q1, Q2
1
8MHz
Y1
1
SWD_DEBUGGER
J1
1
USB_MicroB
J3
1
Connector_02x15
J4
1
GPIO_EXTRA
J5
2
Led_Diode
3V3, 5V
2
SDM2U30CSP_7
D1, D2
2
4.7uH
L1, L2
4
10uF
C1, C2, C15, C28
5
22uF
C3, C6, C9, C43, C44
3
10nF
C4, C7, C10
7
2.2uF
C5, C11, C16, C17, C19, C20, C29
17
100nF
C8, C12, C13, C14, C18, C23, C24, C26 +9
Show 15 more
QtyPartRefs
2
15pF
C21, C22
2
33pF
C25, C38
2
100pF
C32, C33
2
1uF
C39, C40
3
22
R1, R2, R16
1
14.7K
R3
4
4.7K
R4, R23, R27, R31
3
100
R5, R6, R22
6
10K
R7, R8, R17, R24, R28, R29
3
0
R9, R10, R26
3
DNP
R11, R12, R25
7
1K
R13, R14, R18, R20, R32, R33, R34
2
2.49K
R15, R19
1
49.9
R21
1
24.4K
R30

Radar MCU design files

The KiCad project lives in the TonyStark2007/GPR_FMCW_SubGHz repository on GitHub; these links point at the commit this page was built from.

Radar MCU: common questions

What microcontroller does the Radar MCU use?

The Radar MCU is built around the STM32F405, from the STM32 family.

How big is the Radar MCU PCB?

The Radar MCU measures 36.9 × 32.9 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Radar MCU?

98 components, from 35 distinct parts. The full bill of materials is listed on this page.

Where can I download the Radar MCU design files?

From the TonyStark2007/GPR_FMCW_SubGHz repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Radar MCU design in my own project?

Yes, under the terms of its GPL-3.0 license, which TonyStark2007 chose for the repository.

Can I test firmware for the Radar MCU without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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