Picard
About the Picard PCB
Picard is an open source STM32 PCB design by weiiwang01, published on GitHub. It is a 6-layer board measuring 81.5 × 50 mm, with 157 components from 59 distinct parts.
Its main chip is the STM32G071CBU3, from the STM32 family. Other key parts include the ADM3101EACPZ, 74HC123PW,118, TPD4EUSB30DQAR, AP2191W and TPS82130SILR. By type, the board carries 51 capacitors, 41 resistors, 30 ICs, 13 diodes, 7 connectors and 5 transistors.
From the project
PiCard is a miniaturized Raspberry Pi Compute Module carrier board optimized for Linux server use cases.
Main components on the Picard
Picard bill of materials (BOM)
157 components, 59 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ADM3101EACPZ | LFCSP-12-1EP_3x3mm_P0.5mm_EP1.3x1.3mm | U1 |
| 1 | 74HC123PW,118 74HC123PW Nexperia | TSSOP-16_4.4x5mm_P0.65mm | U2 |
| 6 | TPD4EUSB30DQAR TPD4EUSB30 Texas Instruments | USON-10_2.5x1.0mm_P0.5mm | U3, U4, U18, U19, U20, U21 |
| 1 | AP2191W | SOT-23-5 | U5 |
| 1 | TPS82130SILR TPS82130 Texas Instruments | Texas_SIL0008D_MicroSiP-8-1EP_2.8x3mm_P0.65mm_EP1.1x1.9mm_ThermalVias | U6 |
| 1 | TPS62180YZFR TPS62180 Texas Instruments | YZF0024AMAM | U7 |
| 4 | AP21510FM-7 AP21510 DIODES | DFN-6-1EP_2x1.8mm_P0.5mm_EP1.2x1.6mm | U8, U13, U14, U15 |
| 2 | TVS2200DRVR TVS2200DRV Texas Instruments | WSON-6-1EP_2x2mm_P0.65mm_EP1x1.6mm | U9, U10 |
| 4 | TPS259470ARPWR TPS259470 Texas Instruments | RPW0010A-MFG | U11, U12, U16, U17 |
| 2 | TPD6S300ARUKR TPD6S300A Texas Instruments | WQFN-20-1EP_3x3mm_P0.4mm_EP1.7x1.7mm_ThermalVias | U22, U23 |
| 2 | FUSB340TMX onsemi | QFN-18-1EP_2x2.8mm_P0.4mm_EP1.05x1.85mm | U24, U25 |
| 3 | TS3USB221ARSER TS3USB221 Texas Instruments | RSE10 | U26, U27, U28 |
| 1 | TLV70433DBVR TLV70433 Texas Instruments | SOT-23-5 | U29 |
| 1 | STM32G071CBU3 STM32G071CBUx STMicroelectronics | QFN-48-1EP_7x7mm_P0.5mm_EP5.6x5.6mm | U30 |
| 5 | DMN32D2LFB4-7 DMN32D2LFB4 Diodes | Diodes_DFN1006-3 | Q1, Q2, Q3, Q4, Q5 |
| 1 | Q13FC13500004 32.768kHz Seiko Epson | Crystal_SMD_3215-2Pin_3.2x1.5mm | Y1 |
| 1 | RJ45-005-202-11 RS232 Heling | RJ45-TH_RJ45-005-202-11 | J1 |
| 1 | RJ45-005-202-11 Ethernet Heling | RJ45-TH_RJ45-005-202-11 | J2 |
| 1 | 5033981892 Micro_SD_Card_Det2 MOLEX | SDCARD_MOLEX_503398-1892 | J3 |
| 1 | APCI0146-P001A Bus_M.2_Socket_M LOTES | CONN-SMD_APCI0146-P001A | J4 |
Show 39 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | TYPE-C-31-M-27 USB_C_Receptacle Korean Hroparts | USB-C-SMD_TYPE-C-31-M-27 | J5, J6 |
| 1 | M20-7810545R Conn_02x05_Odd_Even | HARWIN_M20-7810545R | J7 |
| 1 | MY-1220-04 CR1220 Battery MYOUNG | BAT-SMD_MY-1220-03 | BT1 |
| 1 | ComputeModule4-CM4 | Raspberry-Pi-4-Compute-Module | ComputeModule1 |
| 2 | MountingHole | MOUNTING-HOLE | H1, H2 |
| 1 | GT-TC018B-H0375-L1 SW_Push G-Switch | SW-SMD_L4.7-W3.5-P3.35-EH | SW1 |
| 1 | CFS-0402TA SW_DIP_x04 NIDEC | SW-SMD_8P-L11.1-W6.2-P2.54-LS7.8 | SW2 |
| 1 | H2456G E-NETTR | XFMR-SMD-24_L16.6-W9.0-LS9.6-BL | TR1 |
| 5 | 1N5819WS Guangdong Hottech | D_SOD-323 | D1, D2, D3, D8, D9 |
| 2 | BZT52C20S Zener 20V ichjc | D_SOD-323 | D4, D7 |
| 3 | 1N4148WS D CJ | D_SOD-323 | D5, D6, D13 |
| 3 | WS2812C-4020 WS2812B worldsemi | LED-SMD_4P-L4.0-W1.7-R | D10, D11, D12 |
| 2 | DFE252012F-1R0M=P2 1u Murata | L_1008_2520Metric | L1, L2 |
| 25 | CL05B104KB54PNC 100n Samsung | C_0402_1005Metric | C1, C2, C3, C4, C5, C17, C21, C27 +17 |
| 6 | CL10A105KB8NNNC 1u Samsung | C_0603_1608Metric | C6, C7, C25, C26, C44, C47 |
| 3 | CL21A106KAYNNNE 10u Samsung | C_0805_2012Metric | C8, C18, C22 |
| 4 | CL21A226MAQNNNE 22u Samsung | C_0805_2012Metric | C9, C10, C13, C14 |
| 2 | CL21A476MQYNNNE 47u Samsung | C_0805_2012Metric | C11, C12 |
| 1 | CL10B223KB8NNNC 22n Samsung | C_0603_1608Metric | C15 |
| 1 | CC0603FRNPO9BN431 430pF YAGEO | C_0402_1005Metric | C16 |
| 4 | 0402B222K500NT 2.2n FH | C_0402_1005Metric | C19, C20, C23, C24 |
| 1 | CL10A475KO8NNNC 4.7u Samsung | C_0603_1608Metric | C42 |
| 2 | 0402CG180J500NT 18pf FH | C_0402_1005Metric | C45, C48 |
| 2 | CL21A475KBQNNNE 4.7u 50V Samsung | C_0805_2012Metric | C49, C50 |
| 4 | 0402WGF4700TCE 470 Uniroyal | R_0402_1005Metric | R1, R2, R5, R6 |
| 3 | 0402WGF1003TCE 100k 1% Uniroyal | R_0402_1005Metric | R3, R4, R12 |
| 8 | 0402WGF1202TCE 12k Uniroyal | R_0402_1005Metric | R7, R8, R14, R25, R26, R39, R40, R41 |
| 5 | 0402WGF3301TCE 3.3k Uniroyal | R_0402_1005Metric | R9, R34, R35, R37, R38 |
| 1 | RTT027873FTH 787k RALEC | R_0402_1005Metric | R10 |
| 1 | RTT023093FTH 309k RALEC | R_0402_1005Metric | R11 |
| 1 | 0402WGF1503TCE 150k 1% Uniroyal | R_0402_1005Metric | R13 |
| 2 | 0402WGF2203TCE 220k 1% Uniroyal | R_0402_1005Metric | R15, R16 |
| 2 | 0402WGF5902TCE 59k Uniroyal | R_0402_1005Metric | R17, R18 |
| 2 | 0402WGF2872TCE 28.7k Uniroyal | R_0402_1005Metric | R19, R20 |
| 4 | 0402WGF9530TCE 953 Uniroyal | R_0402_1005Metric | R21, R22, R23, R24 |
| 2 | 0402WGF1203TCE 120k Uniroyal | R_0402_1005Metric | R27, R28 |
| 2 | 1206W4F4701T5E 4.7k 0.25W Uniroyal | R_1206_3216Metric | R29, R30 |
| 2 | 0402WGF1002TCE 10k Uniroyal | R_0402_1005Metric | R31, R32 |
| 2 | 0402WGF5101TCE 5.1k Uniroyal | R_0402_1005Metric | R33, R36 |
Picard design files
The KiCad project lives in the weiiwang01/picard repository on GitHub; these links point at the commit this page was built from.
- LayoutPiCard.kicad_pcb
- SchematicPiCard.kicad_sch
Picard: common questions
What microcontroller does the Picard use?
The Picard is built around the STM32G071CBU3, from the STM32 family.
How big is the Picard PCB?
The Picard measures 81.5 × 50 mm, has 6 copper layers and is 1.1584 mm thick.
How many components are on the Picard?
157 components, from 59 distinct parts. The full bill of materials is listed on this page.
Where can I download the Picard design files?
From the weiiwang01/picard repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Picard design in my own project?
The repository has no license, so all rights stay with weiiwang01. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Picard 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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