Mdx1
About the Mdx1 PCB
Mdx1 is an open source STM32 PCB design by pingpongshow, published on GitHub under the CC-BY-NC-4.0 license. It is a 4-layer board measuring 135 × 92 mm, with 306 components from 141 distinct parts.
Its main chip is the STM32H743ZIT6, from the STM32 family. Other key parts include the BQ24075RGTR, BQ27441DRZT-G1A, TPS63001DRCR, TPS65131RGET and LT3045. By type, the board carries 125 capacitors, 111 resistors, 27 ICs, 14 diodes, 12 connectors and 8 transistors.
It belongs with the iot & wireless and power & battery designs in this gallery.
From the project
Open multi-frequency + pulse-induction metal detector: KiCad hardware, search coil, portable-C firmware, iOS/Android apps. Experimental, unbuilt.
An open, simultaneous multi-frequency + pulse-induction metal detector — hardware, search coil and firmware.
MDX-1 is a from-scratch detector design: a KiCad schematic and 4-layer main board, a 2-layer user-interface board, a hand-wound search coil, portable C firmware with a host simulator and test bench, and iOS/Android companion apps. The receive and transmit engine is specified around a coherent, DSP-first architecture:
Main components on the Mdx1
Mdx1 bill of materials (BOM)
306 components, 141 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | BQ24075RGTR BQ24075RGT Texas Instruments | VQFN-16-1EP_3x3mm_P0.5mm_EP1.6x1.6mm | U1 |
| 1 | BQ27441DRZT-G1A Texas Instruments | Texas_S-PDSO-N12 | U2 |
| 1 | TPS63001DRCR TPS63001 (3.3V) Texas Instruments | Texas_DRC0010J_ThermalVias | U3 |
| 1 | TPS65131RGET Texas Instruments | Texas_RGE0024H_VQFN-24-1EP_4x4mm_P0.5mm_EP2.7x2.7mm_ThermalVias | U4 |
| 1 | LT3045 LT3045 (+5VA) Analog Devices | MSOP-12-1EP_3x4.039mm_P0.65mm_EP1.651x2.845mm | U5 |
| 1 | LT3094 LT3094 (-5VA) Analog Devices | MSOP-12-1EP_3x4.039mm_P0.65mm_EP1.651x2.845mm | U6 |
| 1 | LP5907MFX-3.3/NOPB TPS7A2033 (+3V3A) Texas Instruments | SOT-23-5 | U7 |
| 1 | LT3757 LT3757 (VTX 8-30V) Analog Devices | MSOP-10-1EP_3x3mm_P0.5mm_EP1.68x1.88mm | U8 |
| 1 | LT3757 LT3757 (VBRIDGE 100V) Analog Devices | MSOP-10-1EP_3x3mm_P0.5mm_EP1.68x1.88mm | U9 |
| 2 | UCC27714D Texas Instruments | SOIC-14_3.9x8.7mm_P1.27mm | U10, U11 |
| 1 | INA241A2QDGKRQ1 Texas Instruments | VSSOP-8_3x3mm_P0.65mm | U12 |
| 1 | TLV3501AIDBVR TLV3501 4.5 V (+5 A) Texas Instruments | SOT-23-6 | U13 |
| 1 | TLV3501AIDBVR TLV3501 0.5 V (-5 A) Texas Instruments | SOT-23-6 | U14 |
| 1 | OPA1612AIDR OPA1612 Texas Instruments | SOIC-8_3.9x4.9mm_P1.27mm | U15 |
| 2 | THS4551IRGTR THS4551 (G=1) Texas Instruments | VQFN-16-1EP_3x3mm_P0.5mm_EP1.68x1.68mm | U16, U17 |
| 1 | OPA1656IDR OPA1656 Texas Instruments | SOIC-8_3.9x4.9mm_P1.27mm | U18 |
| 1 | ADS127L01IPBSR ADS127L01 (ch A) Texas Instruments | TQFP-32_5x5mm_P0.5mm | U19 |
| 1 | ADS127L01IPBSR ADS127L01 (ch B) Texas Instruments | TQFP-32_5x5mm_P0.5mm | U20 |
| 1 | REF5025ID REF5025 (2.500 V, 3 ppm/C) Texas Instruments | SOIC-8_3.9x4.9mm_P1.27mm | U21 |
| 1 | STM32H743ZIT6 STMicroelectronics | LQFP-144_20x20mm_P0.5mm | U22 |
Show 121 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LSM6DSO32TR STMicroelectronics | LGA-14_3x2.5mm_P0.5mm_LayoutBorder3x4y | U23 |
| 1 | TPA6132A2RTER TPA6132A2 (HP amp) Texas Instruments | Texas_RTE0016D_WQFN-16-1EP_3x3mm_P0.5mm_EP0.8x0.8mm_ThermalVias | U24 |
| 1 | PAM8302AADCR PAM8302A (2.5 W class-D) Diodes Inc. | MSOP-8-1EP_3x3mm_P0.65mm_EP1.68x1.88mm | U25 |
| 1 | BM83SM1-00AA Microchip | BM83_MCH | U26 |
| 1 | MAX-M10S-00B MAX-M10S (GNSS) u-blox | ublox_MAX | U27 |
| 1 | SIR680ADP-T1-UE3 SiR680ADP-T1-UE3 Vishay Siliconix | PowerPAK_SO-8_Single | Q1 |
| 1 | BSC190N15NS3GATMA1 BSC190N15NS3 (150V) Infineon | Infineon_PG-TDSON-8_6.15x5.15mm | Q2 |
| 1 | BSS127S-7 BSS127S (600V) Diodes Incorporated | SOT-23 | Q3 |
| 4 | BSC320N20NS3GATMA1 BSC320N20NS3 G Infineon | Infineon_PG-TDSON-8_6.15x5.15mm | Q4, Q5, Q6, Q7 |
| 1 | 2N7002ET1G 2N7002 onsemi | SOT-23 | Q8 |
| 1 | SXT3248FA48-16.384M 16.384 MHz 3225 Suntsu Electronics | Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | ABS07-32.768KHZ-7-T 32.768 kHz 3215 Abracon | Crystal_SMD_3215-2Pin_3.2x1.5mm | Y2 |
| 1 | USB4085-GF-A USB-C 16P GCT | USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
| 1 | USBLC6-2SC6 USBLC6-2SC6 (USB ESD) STMicroelectronics | SOT-23-6 | J2 |
| 1 | B3B-PH-K-S Battery JST-PH 3p JST | JST_PH_B3B-PH-K_1x03_P2.00mm_Vertical | J3 |
| 1 | 61300611121 Coil header 1x06 2.54mm Wurth Elektronik | PinHeader_1x06_P2.54mm_Vertical | J4 |
| 1 | FTSH-105-01-L-DV-K SWD 10p 1.27mm Samtec | PinHeader_2x05_P1.27mm_Vertical | J5 |
| 1 | DM3AT-SF-PEJM5 microSD (Hirose DM3AT) Hirose | microSD_HC_Hirose_DM3AT-SF-PEJM5 | J6 |
| 1 | UI link FFC 20p 0.5mm Hirose | Hirose_FH12-20S-0.5SH_1x20-1MP_P0.50mm_Horizontal | J7 |
| 1 | SJ-3523-SMT 3.5 mm jack CUI Devices | Jack_3.5mm_CUI_SJ-3523-SMT_Horizontal | J8 |
| 1 | B2B-PH-K-S Speaker 8R JST | JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J9 |
| 1 | 73412-0110 Conn_Coaxial Molex | U.FL_Molex_MCRF_73412-0110_Vertical | J13 |
| 1 | BT LL Audio (optional) | Samtec_T1M-10-X-S-V_1x10-1MP_P1.0mm_Terminal_Vertical | J14 |
| 1 | Expanson Header | Samtec_T1M-12-X-S-V_1x12-1MP_P1.0mm_Terminal_Vertical | J15 |
| 1 | SMAJ5.0A-E3/61 SMAJ5.0A TVS Littelfuse | D_SMA | D1 |
| 2 | SS34-E3/57T SS34 Vishay | D_SMA | D2, D3 |
| 1 | B560C-13-F B560C 60V 5A Diodes Inc. | D_SMC | D4 |
| 1 | STPS2150A STPS2150 150V STMicroelectronics | D_SMA | D5 |
| 2 | US1D-E3/61T US1D (200V fast) Vishay | D_SMA | D6, D7 |
| 2 | NSVBAT54SWT1G onsemi | SOT-323_SC-70 | D8, D9 |
| 4 | BAS116-7-F BAS416 Diodes Incorporated | SOT-23 | D10, D11, D12, D13 |
| 1 | PESD0402-140 Nexperia | D_0402_1005Metric | D17 |
| 1 | BLM18KG601SN1D 600R@100MHz Murata | L_0603_1608Metric | FB1 |
| 1 | XAL4020-152MEC 1u5 XAL4020 Coilcraft | L_Coilcraft_XAL4020-XXX | L1 |
| 2 | XAL4030-472MEC 4u7 XAL4020 Coilcraft | L_Coilcraft_XAL4020-XXX | L2, L3 |
| 1 | XAL7050-223MEC 22u XAL7050 Coilcraft | L_Coilcraft_XAL7050-XXX | L4 |
| 1 | XAL7050-473MEC 47u XAL7050 Coilcraft | L_Coilcraft_XAL7050-XXX | L5 |
| 1 | LQW15AN27NG00D 27nH Murata | L_0402_1005Metric | L8 |
| 2 | LMK107BJ475KA-T 4u7 10V Taiyo Yuden | C_0603_1608Metric | C1, C27 |
| 5 | CL21A106KPFNNNG 10u 10V Samsung Electro-Mechanics | C_0805_2012Metric | C2, C3, C6, C9, C26 |
| 29 | GRM155R71H104KE14D 100n Murata | C_0402_1005Metric | C4, C10, C28, C44, C45, C46, C53, C54 +21 |
| 20 | 06033D105KAT2A 1u KYOCERA AVX | C_0603_1608Metric | C5, C24, C25, C70, C72, C73, C74, C75 +12 |
| 2 | C2012X5R0J226M085AB 22u 6.3V TDK | C_0805_2012Metric | C7, C8 |
| 4 | CL05A224KP5NNNC 220n Samsung Electro-Mechanics | C_0402_1005Metric | C11, C34, C104, C105 |
| 1 | GRM155R71H103KA88D 10n (CP) Murata | C_0402_1005Metric | C12 |
| 1 | GRM155R71H472KA01D 4n7 (CN) Murata | C_0402_1005Metric | C13 |
| 3 | CL32A226KAJNNWE 22u 25V Samsung Electro-Mechanics | C_1210_3225Metric | C14, C15, C16 |
| 3 | 06033D105KAT2A 1u 25V KYOCERA AVX | C_0603_1608Metric | C17, C40, C42 |
| 2 | C2012X5R1E475K125AB 4u7 25V TDK | C_0805_2012Metric | C18, C21 |
| 2 | C2012X5R1V106K085AC 10u 25V TDK | C_0805_2012Metric | C19, C22 |
| 5 | LMK107BJ475KA-T 4u7 Taiyo Yuden | C_0603_1608Metric | C20, C23, C29, C35, C86 |
| 2 | GRM155R71H472KA01D 4n7 Murata | C_0402_1005Metric | C30, C101 |
| 1 | EEU-FC1H101 100u 50V Panasonic | CP_Radial_D8.0mm_P3.50mm | C31 |
| 1 | C1210C106K5RACTU 10u 50V KEMET | C_1210_3225Metric | C32 |
| 1 | GRM32ER71H475KA88L 4u7 50V Murata | C_1210_3225Metric | C33 |
| 1 | GRM155R71H103KA88D 10n Murata | C_0402_1005Metric | C36 |
| 1 | 160PK47MEFC10X20 47u 160V Rubycon | CP_Radial_D10.0mm_P5.00mm | C37 |
| 3 | C5750X7T2E225K250KE 2u2 250V TDK | C_2220_5750Metric | C38, C39, C48 |
| 2 | GRM188R71H224KAC4D 220n 50V Murata | C_0603_1608Metric | C41, C43 |
| 1 | VPDD202W102K1GV001E 1n 250V Vishay | C_1206_3216Metric | C47 |
| 1 | GRM31CR72E104KW03L 100n 250V Murata | C_1206_3216Metric | C49 |
| 1 | C1005C0G1H102J050BA 1n TDK | C_0402_1005Metric | C50 |
| 2 | 12103C105KAT2A 1u C0G/film KYOCERA AVX | C_1210_3225Metric | C51, C52 |
| 2 | GRM1555C1H681JA01D 680p C0G Murata | C_0402_1005Metric | C55, C56 |
| 2 | GRM1555C1H332JE01D 3n3 C0G Murata | C_0402_1005Metric | C58, C62 |
| 4 | GRM1555C1H331JA01D 330p C0G Murata | C_0402_1005Metric | C59, C60, C63, C64 |
| 3 | CL05A105KP5NNNC 1u Samsung Electro-Mechanics | C_0402_1005Metric | C67, C102, C103 |
| 8 | CL21A106KPFNNNG 10u Samsung Electro-Mechanics | C_0805_2012Metric | C68, C69, C76, C84, C97, C111, C112, C113 |
| 4 | GRM188R61E225KA12D 2u2 Murata | C_0603_1608Metric | C89, C90, C106, C107 |
| 2 | GRM1555C1H100JA01D 10p C0G Murata | C_0402_1005Metric | C93, C94 |
| 2 | GRM1555C1H6R8DA01D 6.8p C0G Murata | C_0402_1005Metric | C95, C96 |
| 1 | GRM1555C1H330JA01D 33 pF Murata | C_0402_1005Metric | C127 |
| 1 | GRM155R71H103KA88D 10nF Murata | C_0402_1005Metric | C128 |
| 2 | RC0402FR-075K1L 5k1 Yageo | R_0402_1005Metric | R1, R2 |
| 1 | RC0402FR-071K1L 1k1 (IIN 1.4A) Yageo | R_0402_1005Metric | R3 |
| 1 | RC0402FR-07887RL 887R (ICHG 1A) Yageo | R_0402_1005Metric | R4 |
| 1 | RC0402FR-0747KL 47k (timer) Yageo | R_0402_1005Metric | R5 |
| 1 | RC0402FR-0710KL 10k (TS, DNP w/ NTC) Yageo | R_0402_1005Metric | R6 |
| 10 | RC0402FR-07100KL 100k Yageo | R_0402_1005Metric | R7, R8, R14, R15, R24, R46, R69, R70 +2 |
| 1 | WSL1206R0100FEA 10m 1% (gauge) Vishay Dale | R_1206_3216Metric | R9 |
| 13 | RC0402FR-0710KL 10k Yageo | R_0402_1005Metric | R10, R11, R16, R19, R37, R49, R50, R53 +5 |
| 3 | RC0402FR-074K7L 4k7 Yageo | R_0402_1005Metric | R12, R13, R109 |
| 6 | RC0402FR-0747KL 47k Yageo | R_0402_1005Metric | R17, R36, R101, R102, R103, R104 |
| 4 | RC0402FR-0722KL 22k Yageo | R_0402_1005Metric | R18, R29, R39, R63 |
| 1 | RC0402FR-07100RL 100R (VIN filter) Yageo | R_0402_1005Metric | R20 |
| 4 | RC0402FR-071ML 1M Yageo | R_0402_1005Metric | R21, R62, R67, R68 |
| 1 | RC0402FR-07113KL 113k Yageo | R_0402_1005Metric | R22 |
| 1 | RC0402FR-07499KL 499k Yageo | R_0402_1005Metric | R23 |
| 2 | ERA-2AEB4992X 49k9 0.1% SET (100uA) Panasonic | R_0402_1005Metric | R25, R26 |
| 1 | RC0402FR-0710RL 10R (LCD supply) Yageo | R_0402_1005Metric | R27 |
| 1 | RC0402FR-0741K2L 41k2 (300kHz) Yageo | R_0402_1005Metric | R28 |
| 2 | RC0402FR-07442KL 442k Yageo | R_0402_1005Metric | R30, R35 |
| 1 | CR0402-FX-4022GLF 40k2 Bourns | R_0402_1005Metric | R31 |
| 1 | RC0402FR-0766K5L 66k5 Yageo | R_0402_1005Metric | R32 |
| 1 | WSL1206R0200FEA 20m (sense) Vishay Dale | R_1206_3216Metric | R33 |
| 2 | RC0402FR-0710RL 10R Yageo | R_0402_1005Metric | R34, R44 |
| 1 | RC0402FR-07140KL 140k (100kHz) Yageo | R_0402_1005Metric | R38 |
| 2 | RC0402FR-07619KL 619k Yageo | R_0402_1005Metric | R40, R41 |
| 1 | RC0402FR-0720KL 20k0 Yageo | R_0402_1005Metric | R42 |
| 1 | WSL1206R0500FEA 50m (sense) Vishay Dale | R_1206_3216Metric | R43 |
| 1 | CR2512-FX-1002ELF 10k 1W (bleed) Bourns | R_2512_6332Metric | R45 |
| 4 | RC0402FR-074R7L 4R7 Yageo | R_0402_1005Metric | R47, R48, R51, R52 |
| 1 | WSL2512R0200FEA 20m 1% shunt Vishay Dale | R_2512_6332Metric | R55 |
| 2 | RC0402FR-071KL 1k Yageo | R_0402_1005Metric | R56, R59 |
| 2 | RC0402FR-079K1L 9k1 Yageo | R_0402_1005Metric | R57, R58 |
| 1 | CRCW251247R0FKEG 47R 1W snub Vishay Dale | R_2512_6332Metric | R61 |
| 2 | CR0402-FX-47R0GLF 47R Bourns | R_0402_1005Metric | R65, R66 |
| 10 | ERA-2VEB1001X 1k 0.1% Panasonic | R_0402_1005Metric | R71, R72, R74, R75, R76, R77, R80, R81 +2 |
| 1 | ERA-2AEB1050X 105R 0.1% (Rg) Panasonic | R_0402_1005Metric | R73 |
| 5 | RC0402FR-07100RL 100R Yageo | R_0402_1005Metric | R78, R79, R84, R85, R106 |
| 1 | ERA-2AEB5111X 5k11 0.1% Panasonic | R_0402_1005Metric | R86 |
| 1 | ERA-2VEB1002X 10k 0.1% Panasonic | R_0402_1005Metric | R87 |
| 2 | RC0402FR-0760K4L 60k4 (HR mode) Yageo | R_0402_1005Metric | R88, R93 |
| 2 | RC0402FR-0710KL 10k (int LDO) Yageo | R_0402_1005Metric | R89, R94 |
| 2 | RC0402FR-07100KL 100k (FSMODE=0 slave) Yageo | R_0402_1005Metric | R90, R95 |
| 2 | RC0402FR-07100KL 100k (FORMAT=1 frame-sync) Yageo | R_0402_1005Metric | R91, R96 |
| 2 | RC0402FR-07100KL 100k (HR=1) Yageo | R_0402_1005Metric | R92, R97 |
| 1 | RC0402FR-0733RL 33R Yageo | R_0402_1005Metric | R99 |
| 1 | RC0402FR-074K7L 4k7 (1-wire) Yageo | R_0402_1005Metric | R100 |
| 1 | RC0402FR-0722RL 22R Yageo | R_0402_1005Metric | R105 |
| 1 | RC0402JR-070RL 0R (addr) Yageo | R_0402_1005Metric | R108 |
Mdx1 design files
The KiCad project lives in the pingpongshow/MDX-1 repository on GitHub; these links point at the commit this page was built from.
Mdx1: common questions
What microcontroller does the Mdx1 use?
The Mdx1 is built around the STM32H743ZIT6, from the STM32 family.
How big is the Mdx1 PCB?
The Mdx1 measures 135 × 92 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Mdx1?
306 components, from 141 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Mdx1 design files?
From the pingpongshow/MDX-1 repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Mdx1 design in my own project?
It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.
Can I test firmware for the Mdx1 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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