2 layers74.4 × 97.8 mm
Tamagotchi
Ayush09S/Tamagotchi
A small digital pet as a physical device remake! It features an LDR that can detect light changes, four buttons, and a buzzer. It also has an OLED display!
16 partsMIT
2 layers90 × 85 mm
MultiBench
M-Mrk/MultiBench1A bench multimeter with the usual functions, but also with usb connectivity to log, stream and monitor readings.
- Size
- 90 × 85 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 87
- Nets
- 89
- Pads
- 316
- Tracks, vias
- 801, 142
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 4 May 2026
- Updated
- 2 Jun 2026
Overview
MultiBench is an open-source printed circuit board by M-Mrk, from the M-Mrk/MultiBench repository on GitHub. It is a 2-layer board of 90 × 85 mm with 87 parts on 89 nets, routed with 801 tracks and 142 vias.
It is built around the PRTR5V0U2X-ES, CD4051BE and AMS1117-3.3, with the HS96L03W2C03, MX26631S and USBLC6-2SC6 among its other parts. Its parts include 30 resistors, 13 capacitors, 11 ICs, 9 connectors and 5 diodes. It belongs with the STM32 boards of this library.
Main components
12
PRTR5V0U2X-ES
SOT-143-40℃~+125℃ 0.8pF、1.6pF 180W@8/20us 18V 1uA 2 5V 6V 9A@8/20us ESD IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 Unidirectional SOT-143 ESD and Surge Protection (TVS/ESD) ROHSElecSuperESD And Surge Protection (TVS/ESD)
CD4051BE
PDIP-16-55℃~+125℃ 125Ω 20MHz 3V~20V 450ns 8 8:1 PDIP-16 Analog Switches, Multiplexers ROHSTexas InstrumentsAnalog Switches, Multiplexers
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
HS96L03W2C03
--40℃~+70℃ 0.96 128x64 180cd/m2 21.744x10.864mm I2C Passive (PMOLED) SSD1315 chip White - OLED Display ROHSHSOLED Display
MX26631S
SOP-8Surge Protection Devices (SPDs)Wuxi Maxinmicro
USBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
TS-1109S-C-J
SMD-4P,4.5x4.5mm-30℃~+85℃ 100,000 cycles 12V 2.6N 4.5mm 4.5mm 50mA 8mm Black No Round Button SPST Surface Mount,Vertical Without Bracket SMD-4P,4.5x4.5mm Tactile Switches ROHSXKB ConnectionTactile Switches
MPZ2012S601AT000
0805-55℃~+125℃ 1 100mΩ 2A 600Ω@100MHz ±25% 0805 Ferrite Beads ROHSTDKFerrite Beads
1N4148W
SOD-123150mA 1A 1V@50mA 1uA@75V 400mW 4ns 75V Independent SOD-123 Switching Diodes ROHSSTMicroelectronicsSwitching Diodes
BAT54SLT1G
SOT-23Schottky DiodesDOWOBC817-25,215
SOT-23-65℃~+150℃ 1 NPN 100MHz 100nA 160 250mW 45V 500mA 5V 700mV NPN SOT-23 Bipolar (BJT) ROHSNexperiaBipolar (BJT)
H6OEL89CSC-SUGYLC-8M
HC-49S-SMD-20℃~+70℃ 20pF 70Ω 8MHz Crystal Oscillator ±20ppm ±30ppm HC-49S-SMD Crystals ROHSYXCCrystals
README
README.mdMultiBench
A bench multimeter with the usual functions, but also with usb connectivity to log, stream and monitor readings.
Features
Measurements
- Voltage (up to 150V)
- Resistance
- Capacity
- Continuity
See here for more details on how these are measured.
Logic
- Read UART
- Read connected I2C addresses
Power
- 3.3V up to 1A
- 5V up to 1A
- Protection against overdraw and short circuits
Interaction
- 0.96" oled screen
- handy buttons
- piezo buzzer
- standard 2.54mm headers for all functions
Why?
Ever needed to identify many spare parts you have laying around? Or needed to track some electrical characteristics? Well MultiBench was made for those purposes, both as a part identifier and a multimeter with logging capabilities.
This project itself was started to learn pcb design with a bare mcu and how to work with an stm32. This was made during Fallout, also see the zine page I made for Fallout.
Usage
Connect any type of probe or wire to a functions certain header. Navigate through the functions with the buttons and measure! If it is connected via usb it will automatically show up as a CDC device and send the current readings.
Build your own
PCB and Parts
Get all the parts from the BOM and order the pcb with the gerberfiles in the releases of this repo.
Soldering
As it contains many smd parts a hotplate or at least a hot air gun is heavly recommended. First solder all SMD components, lastly solder the tht components (usb-c, screen, headers, power switch, etc)
Case
3D print the case. Multicolor is recommended to make the labels on the case readable. You can use the prepared 3mf files with black and white coloring: top of case, bottom of case and the power switch.
Programming
Before assembling you will need to flash the stm32. A st-link capable programmer is needed and prefarebly a 5x2 1.27mm pogo clamp (pin 7 and pins 9/10 can be missing). Program the file provided from the releases of this repo (firmware.elf).
Assembly
- Press the pcb into the case bottom. Angle the pcb slightly when inserting to make the usb and powerswitch fit.
- Put the power switch cap on
- Press fit the top on. Make sure to press on all 4 corners.
BOM
CSV here. Prices are in euro.
| Reference | Qty | Value | Footprint | Link | LCSC Part | Note | Unit Price | MOQ | Total Price |
|---|---|---|---|---|---|---|---|---|---|
| C1,C4 | 2 | 20pF | Capacitor_SMD:C_0603_1608Metric | https://lcsc.com/product-detail/C376774.html | C376774 | 0.0026 | 100 | 0.26 | |
| C2 | 1 | 10nF | Capacitor_SMD:C_0603_1608Metric | https://lcsc.com/product-detail/C1589.html | C1589 | 0.0035 | 50 | 0.18 | |
| C3,C6,C7 | 3 | 100nF | Capacitor_SMD:C_0603_1608Metric | https://lcsc.com/product-detail/C24452.html | C24452 | 0.0092 | 20 | 0.18 | |
| C5 | 1 | 1uF | Capacitor_SMD:C_0603_1608Metric | https://lcsc.com/product-detail/C1592.html | C1592 | 0.0055 | 50 | 0.28 | |
| C8 | 1 | 4.7uF | Capacitor_SMD:C_0603_1608Metric | https://lcsc.com/product-detail/C19666.html | C19666 | 0.0098 | 10 | 0.10 | |
| C9,C10,C13 | 3 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | https://lcsc.com/product-detail/C77058.html | C77058 | 0.0286 | 1 | 0.09 | |
| C11,C12 | 2 | 10uF | Capacitor_SMD:C_0805_2012Metric | https://lcsc.com/product-detail/C95841.html | C95841 | 0.0265 | 10 | 0.27 | |
| J1,J2,J3,J4,J5,J6,J7,J8,J9 | 10 | Headers | Connector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_Vertical | https://lcsc.com/product-detail/C42431841.html | C42431841 | 0.0583 | 5 | 0.58 | |
| L1,L2 | 2 | MPZ2012S601AT000 | lcsc_lib:L0805 | https://lcsc.com/product-detail/C21519.html | C21519 | 0.0251 | 10 | 0.25 | |
| BUZZER1 | 1 | MLT-8540H | lcsc_lib:BUZ-SMD_4P-L8.5-W8.5-P8.50-TL | https://lcsc.com/product-detail/C95298.html | C95298 | 0.1936 | 5 | 0.97 | |
| X1 | 1 | H6OEL89CSC-SUGYLC-8M | lcsc_lib:HC-49S_L11.4-W4.8-LS12.7 | https://lcsc.com/product-detail/C7471629.html | C7471629 | 0.0831 | 5 | 0.42 | |
| U11 | 1 | HS96L03W2C03 | lcsc_lib:OLED-TH_L27.8-W27.2-P2.54_C9900033791 | https://lcsc.com/product-detail/C5248080.html | C5248080 | 2.0448 | 1 | 2.04 | |
| D1 | 1 | SMBJ5.0A-13-F | lcsc_lib:SMB_L4.6-W3.6-LS5.3-RD | https://lcsc.com/product-detail/C110528.html | C110528 | 0.0911 | 3 | 0.27 | |
| D5 | 1 | 1N4148W T4 | lcsc_lib:SOD-123_L2.8-W1.8-LS3.7-RD | https://lcsc.com/product-detail/C2099.html | C2099 | 0.0086 | 50 | 0.43 | |
| U3,U9 | 2 | CD4051B | lcsc_lib:SOIC-16_L10.8-W5.5-P1.27-LS7.8-BL | https://lcsc.com/product-detail/C87646.html | C87646 | 0.3382 | 1 | 0.68 | |
| U2 | 1 | MX26631S | lcsc_lib:SOP-8_L4.9-W3.9-P1.27-LS6.0-BL | https://lcsc.com/product-detail/C34376142.html | C34376142 | 0.6701 | 1 | 0.67 | |
| U4,U5,U6,U7 | 4 | PRTR5V0U2X-ES | lcsc_lib:SOT-143_L2.9-W1.3-P1.92-LS2.3-BR | https://lcsc.com/product-detail/C5180302.html | C5180302 | 0.0356 | 5 | 0.18 | |
| Q1 | 1 | BC817-25,215 | lcsc_lib:SOT-23-3_L2.9-W1.6-P1.90-LS2.8-BR | https://lcsc.com/product-detail/C22400355.html | C22400355 | 0.0101 | 50 | 0.51 | |
| U10 | 1 | USBLC6-2SC6_C5261088 | lcsc_lib:SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BR | https://lcsc.com/product-detail/C5261088.html | C5261088 | 0.0289 | 5 | 0.14 | |
| D4 | 1 | BAT54SLT1G | lcsc_lib:SOT-23_L2.9-W1.3-P1.90-LS2.4-BR | https://lcsc.com/product-detail/C19726.html | C19726 | 0.0250 | 1 | 0.03 | |
| SW2,SW3,SW4 | 3 | TS-1109S-C-J | lcsc_lib:SW-SMD_4P-L4.5-W4.5-P3.00-LS7.0 | https://lcsc.com/product-detail/C318907.html | C318907 | 0.0332 | 20 | 0.66 | |
| SW1 | 1 | TK-6580A-1 | lcsc_lib:SW-TH_TK-6580A-1 | https://lcsc.com/product-detail/C528770.html | C528770 | 0.1929 | 5 | 0.96 | |
| USB1 | 1 | UC23-0B16F00P11 | lcsc_lib:USB-C-TH_UC23-0B16F00P11 | https://lcsc.com/product-detail/C36936564.html | C36936564 | 0.5293 | 1 | 0.53 | |
| D2,D3 | 2 | PWR | LED_SMD:LED_1206_3216Metric | https://lcsc.com/product-detail/C51933316.html | C51933316 | 0.0061 | 50 | 0.31 | |
| U1 | 1 | STM32F103CBTx | Package_QFP:LQFP-48_7x7mm_P0.5mm | https://lcsc.com/product-detail/C8304.html | C8304 | 1.8620 | 1 | 1.86 | |
| U8 | 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | https://lcsc.com/product-detail/C5205141.html | C5205141 | 0.0344 | 10 | 0.34 | |
| R1,R2,R8,R9,R12,R26,R29 | 7 | 10kR | Resistor_SMD:R_0603_1608Metric | https://lcsc.com/product-detail/C2906982.html | C2906982 | Precision needed | 0.0010 | 100 | 0.10 |
| R3,R4 | 2 | 5.1kR | Resistor_SMD:R_0603_1608Metric | https://lcsc.com/product-detail/C2907114.html | C2907114 | 0.0010 | 100 | 0.10 | |
| R5,R6 | 2 | 4.7kR | Resistor_SMD:R_0603_1608Metric | https://lcsc.com/product-detail/C2907034.html | C2907034 | 0.0011 | 100 | 0.11 | |
| R7,R11,R22 | 3 | 1.2kR | Resistor_SMD:R_0603_1608Metric | https://lcsc.com/product-detail/C2906976.html | C2906976 | Precision needed | 0.0012 | 100 | 0.12 |
| R10 | 1 | 36kR | Resistor_SMD:R_0603_1608Metric | https://lcsc.com/product-detail/C2930097.html | C2930097 | 0.0011 | 100 | 0.11 | |
| R13,R24,R28 | 3 | 100kR | Resistor_SMD:R_0603_1608Metric | https://lcsc.com/product-detail/C161785.html | C161785 | PR >= 150mW,Precision needed | 0.0645 | 10 | 0.65 |
| R14 | 1 | 1MR | Resistor_SMD:R_0603_1608Metric | https://lcsc.com/product-detail/C2907003.html | C2907003 | Precision needed | 0.0010 | 100 | 0.1 |
| R15,R16,R17,R18,R19,R20,R21 | 7 | 33R | Resistor_SMD:R_0603_1608Metric | https://lcsc.com/product-detail/C2907154.html | C2907154 | 0.0011 | 100 | 0.11 | |
| R23,R30 | 2 | 470R | Resistor_SMD:R_0603_1608Metric | https://lcsc.com/product-detail/C2907041.html | C2907041 | 0.0011 | 100 | 0.11 | |
| R25 | 1 | 3.3kR | Resistor_SMD:R_0603_1608Metric | https://lcsc.com/product-detail/C2907023.html | C2907023 | Precision needed | 0.0010 | 100 | 0.1 |
| R27 | 1 | 33kR | Resistor_SMD:R_0603_1608Metric | https://lcsc.com/product-detail/C2907028.html | C2907028 | Precision needed | 0.0009 | 100 | 0.09 |
| PCB | 1 | FR-4, 2 Layers, HASL | https://jlcpcb.com/ | 0.344 | 5 | 1.72 | |||
| Stencil | 1 | https://jlcpcb.com/ | 6.11 | 1 | 6.11 | ||||
| Paste | 1 | https://de.aliexpress.com/item/1005007119691010.html/ | T4 | 1 | 5.89 | ||||
| Paste Squeegee | 1 | https://de.aliexpress.com/item/1005006384480589.html | 1 | 2.59 | |||||
| StLinkV2 | 1 | https://de.aliexpress.com/item/1005007038343639.html/ | 1 | 2.09 | |||||
| Total | 32.29€ |
Parts
87| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 10kR | Resistor_SMD:R_0603_1608Metric | R1, R2, R8, R9, R12, R26, R29 |
| 7 | 33R | Resistor_SMD:R_0603_1608Metric | R15, R16, R17, R18, R19, R20, R21 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_2.7mm_M2.5_DIN965_Pad | H1, H2, H3, H4 |
| 4 | PRTR5V0U2X-ES | lcsc_lib:SOT-143_L2.9-W1.3-P1.92-LS2.3-BR | U4, U5, U6, U7 |
| 3 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C9, C10, C13 |
| 3 | 1.2kR | Resistor_SMD:R_0603_1608Metric | R7, R11, R22 |
| 3 | 100kR | Resistor_SMD:R_0603_1608Metric | R13, R24, R28 |
| 3 | 100nF | Capacitor_SMD:C_0603_1608Metric | C3, C6, C7 |
| 3 | TS-1109S-C-J | lcsc_lib:SW-SMD_4P-L4.5-W4.5-P3.00-LS7.0 | SW2, SW3, SW4 |
| 2 | 10uF | Capacitor_SMD:C_0805_2012Metric | C11, C12 |
| 2 | 20pF | Capacitor_SMD:C_0603_1608Metric | C1, C4 |
| 2 | 4.7kR | Resistor_SMD:R_0603_1608Metric | R5, R6 |
| 2 | 470R | Resistor_SMD:R_0603_1608Metric | R23, R30 |
| 2 | 5.1kR | Resistor_SMD:R_0603_1608Metric | R3, R4 |
| 2 | CD4051B | lcsc_lib:SOIC-16_L10.8-W5.5-P1.27-LS7.8-BL | U3, U9 |
| 2 | MPZ2012S601AT000 | lcsc_lib:L0805 | L1, L2 |
| 2 | PWR | LED_SMD:LED_1206_3216Metric | D2, D3 |
| 1 | 10nF | Capacitor_SMD:C_0603_1608Metric | C2 |
| 1 | 1MR | Resistor_SMD:R_0603_1608Metric | R14 |
| 1 | 1N4148W T4 | lcsc_lib:SOD-123_L2.8-W1.8-LS3.7-RD | D5 |
| 1 | 1uF | Capacitor_SMD:C_0603_1608Metric | C5 |
| 1 | 3.3kR | Resistor_SMD:R_0603_1608Metric | R25 |
| 1 | 33kR | Resistor_SMD:R_0603_1608Metric | R27 |
| 1 | 36kR | Resistor_SMD:R_0603_1608Metric | R10 |
| 1 | 4.7uF | Capacitor_SMD:C_0603_1608Metric | C8 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U8 |
| 1 | BAT54SLT1G | lcsc_lib:SOT-23_L2.9-W1.3-P1.90-LS2.4-BR | D4 |
| 1 | BC817-25,215 | lcsc_lib:SOT-23-3_L2.9-W1.6-P1.90-LS2.8-BR | Q1 |
| 1 | Capacitance | Connector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_Vertical | J1 |
| 1 | Continuity | Connector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_Vertical | J4 |
| 1 | H6OEL89CSC-SUGYLC-8M | lcsc_lib:HC-49S_L11.4-W4.8-LS12.7 | X1 |
| 1 | HS96L03W2C03 | lcsc_lib:OLED-TH_L27.8-W27.2-P2.54_C9900033791 | U11 |
| 1 | I2C | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical | J2 |
| 1 | MLT-8540H | lcsc_lib:BUZ-SMD_4P-L8.5-W8.5-P8.50-TL | BUZZER1 |
| 1 | MX26631S | lcsc_lib:SOP-8_L4.9-W3.9-P1.27-LS6.0-BL | U2 |
| 1 | Misc | Connector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_Vertical | J5 |
| 1 | Power | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical | J6 |
| 1 | Prog Header | Connector_PinHeader_1.27mm:PinHeader_2x05_P1.27mm_Vertical | J7 |
| 1 | RST | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP5 |
| 1 | Resistance | Connector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_Vertical | J8 |
| 1 | SHDN | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP4 |
| 1 | SMBJ5.0A-13-F | lcsc_lib:SMB_L4.6-W3.6-LS5.3-RD | D1 |
| 1 | STM32F103CBTx | Package_QFP:LQFP-48_7x7mm_P0.5mm | U1 |
| 1 | TK-6580A-1 | lcsc_lib:SW-TH_TK-6580A-1 | SW1 |
| 1 | UART | Connector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_Vertical | J3 |
| 1 | UC23-0B16F00P11 | lcsc_lib:USB-C-TH_UC23-0B16F00P11 | USB1 |
| 1 | USBLC6-2SC6_C5261088 | lcsc_lib:SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BR | U10 |
| 1 | Voltage | Connector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_Vertical | J9 |
| 1 | boot0 | Jumper:SolderJumper-3_P2.0mm_Open_TrianglePad1.0x1.5mm | JP1 |
| 1 | boot1 | Jumper:SolderJumper-3_P2.0mm_Open_TrianglePad1.0x1.5mm | JP2 |
| 1 | eFuse | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP3 |
Questions
How big is the MultiBench PCB?
It measures 90 × 85 mm and has 2 copper layers, 1.6 mm thick.
What parts does the MultiBench use?
87 parts, built around the PRTR5V0U2X-ES, CD4051BE, AMS1117-3.3 and HS96L03W2C03. 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 MultiBench KiCad files?
From the M-Mrk/MultiBench repository on GitHub, at the commit this page was made from: the board is pcb/multibench.kicad_pcb and its schematic pcb/buttons.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the MultiBench design in my own project?
Its repository states no licence, so its author keeps all rights: ask M-Mrk before reusing the design.
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