2 layers74 × 41 mm
MBus USB 12
greenMikeEU/shrdzm
SHRDZM (just a name, not an acronym) is an ESP8285/ESP8266 based sensor and actor integration platform.
29 partsGPL-3.0
4 layers210 × 210 mm
SmartSwitch
Joe-Purvis/UFEThis repository consolidates multiple projects into a single monorepo for the Ultrasound Smart Switch system.
- Size
- 210 × 210 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 187
- Nets
- 173
- Pads
- 606
- Tracks, vias
- 771, 354
- Pours
- 10
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 24 Mar 2026
- Updated
- 24 Mar 2026
Overview
SmartSwitch is an open-source printed circuit board by Joe-Purvis, from the Joe-Purvis/UFE repository on GitHub. It is a 4-layer board of 210 × 210 mm with 187 parts on 173 nets, routed with 771 tracks and 354 vias.
It is built around the 74LVC3G17DP, 74LVC1G125 and NMA0515DC, with the 74LVC125AD, OKR-T/3-W12-C and AD8137YRZ among its other parts. Its parts include 64 capacitors, 57 resistors, 21 ICs, 11 connectors and 6 diodes.
Main components
12
74LVC3G17DP
TSSOP-8-40℃~+125℃ 1 1.65V~5.5V 3 3.6ns@3.3V,50pF 32mA 32mA 4uA 74LVC Schmitt trigger Unidirectional TSSOP-8 Buffers, Drivers, Receivers, Transceivers ROHSNexperiaBuffers, Drivers, Receivers, Transceivers
74LVC1G125
SOT-353SOT-353 Buffers, Drivers, Receivers, Transceivers ROHSWuxi I-core ElecBuffers, Drivers, Receivers, Transceivers
NMA0515DC
插件1W 1kV 2 33mA 4.5V~5.5V 78% ±15V 插件 Isolated Power Modules ROHSMurataIsolated Power Modules
74LVC125AD
SOP-14L-40℃~+125℃ 1 1.65V~5.5V 2.6ns@5V,15pF 4 40uA 50mA 50mA 74LVC Schmitt trigger Tri-State Unidirectional SOP-14L Buffers, Drivers, Receivers, Transceivers ROHSMDDBuffers, Drivers, Receivers, Transceivers
OKR-T/3-W12-C
SIP-5-40℃~+85℃ 10.2mm 10.4mm 15W 16.5mm 200uF 25mVp-p 3A 4.5V~14V 591mV~6V 600kHz 93% Over Current Protection、Overheat protection SIP-5 Isolated Power Modules ROHSMurataIsolated Power Modules
AD8137YRZ
SOIC-8Differential AmplifiersAnalog Devices
TC4422ESM
SOIJ-8-40℃~+150℃ 1 200uA 4.5V~18V 60ns 60ns 9A 9A MOSFET SOIJ-8 Gate Drivers ROHSMicrochip TechnologyGate Drivers74LVC2G74DP
TSSOP-8-3.0mm-40℃~+125℃ 1 1 1.1ns 1.65V~5.5V 100nA 1ns 2.5ns@5V,50pF 200MHz 24mA 24mA 4pF 74LVC Series Asynchronous Complementary type D-Type Rising Edge Set and Reset TSSOP-8-3.0mm Flip Flops ROHSNexperiaFlip FlopsTLE2426ID
SOIC-8-40℃~+85℃ 120uVrms 20mA 25ppm/℃ 2V~20V 400uA 4V~40V Adjustable Ground (Virtual) ±1% SOIC-8 Voltage Reference ROHSTexas InstrumentsVoltage Reference
FCP380N60E
TO-220-55℃~+150℃ 1 N-channel 1.77nF 10.2A 106W 3.5V 320mΩ@10V 45nC@10V 600V 60pF 945pF N-Channel ±20V TO-220 MOSFETs ROHSonsemiMOSFETs
PESD5V0S1UL
DFN1006-21 100nA 150W 152pF 15A@8/20us 20V 5V 6.4V ESD IEC 61000-4-2、IEC 61000-4-5 Unidirectional DFN1006-2 ESD and Surge Protection (TVS/ESD) ROHSNexperiaESD And Surge Protection (TVS/ESD)
IRLZ44NPBF
TO-220AB-55℃~+175℃ 1 N-channel 1.7nF 110W 150pF 25mΩ@5V 2V 400pF 47A 48nC@5V 55V N-Channel TO-220AB MOSFETs ROHSInfineon TechnologiesMOSFETs
README
README.mdUltraSound Front End (UFE)
This repository consolidates multiple projects into a single monorepo for the Ultrasound Smart Switch system.
Structure
-
Upduino/ FPGA firmware, UART interface, and hardware control logic
-
Matlab/ Simulation, signal processing, and GUI development
-
SmartSwitch/ Circuit design, KiCad schematics, and hardware implementation
Notes
- Each subdirectory was originally an independent repository
- History has been preserved during import
- This repo is now the single source of truth going forward
Future Work
- Add LTSpice models and simulations
- Improve documentation and cross-project integration
Parts
187| Qty | Value | Footprint | References |
|---|---|---|---|
| 28 | 0.1µF | TxRx_Switch:C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C2, C10, C11, C13, C17, C20, C22, C24, C26, C27, C28, C29, C31, C33, C35, C38 +12 |
| 25 | 10µF | TxRx_Switch:C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C1, C3, C5, C12, C15, C16, C19, C21, C23, C25, C30, C32, C36, C43, C44, C48 +9 |
| 8 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4, H5, H6, H7, H8 |
| 8 | TestPoint | TestPoint:TestPoint_Keystone_5000-5004_Miniature | TP1, TP2, TP3, TP4, TP7, TP8, TP9, TP10 |
| 7 | 100kΩ | TxRx_Switch:0805_2012Metric | R5, R6, R13, R14, R15, R55, R56 |
| 6 | 10kΩ | TxRx_Switch:0805_2012Metric | R25, R26, R27, R31, R32, R48 |
| 6 | 10Ω | TxRx_Switch:0805_2012Metric | R1, R2, R3, R4, R7, R8 |
| 5 | Conn_Coaxial | TxRx_Switch:SMA_Amphenol_132134_Vertical | J3, J4, J5, J7, J8 |
| 4 | 10,000pF | TxRx_Switch:C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C14, C63, C64, C69 |
| 4 | 470Ω | TxRx_Switch:0805_2012Metric | R46, R50, R51, R61 |
| 4 | FCP380N60 | Package_TO_SOT_THT:TO-220-3_Vertical | Q1, Q2, Q5, Q6 |
| 3 | 10 pF | TxRx_Switch:C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C18, C34, C70 |
| 3 | 330 Ω | TxRx_Switch:0805_2012Metric | R29, R30, R34 |
| 3 | 49.9 Ω | TxRx_Switch:0805_2012Metric | R43, R44, R45 |
| 3 | 74LVC3G17 | Package_SO:TSSOP-8_3x3mm_P0.65mm | U11, U12, U17 |
| 3 | Conn_ECM302604R | TxRx_Switch:Connector, ECM202604R | J9, J10, J11 |
| 3 | PESD5V0S1UL | Diode_SMD:D_SOD-882 | D3, D4, D5 |
| 3 | SW_Push | TxRx_Switch:SW_Push_1P1T_NO_CK_KMR2 | SW1, SW2, SW3 |
| 2 | 0 Ω | TxRx_Switch:0805_2012Metric | R57, R58 |
| 2 | 1 kΩ | TxRx_Switch:0805_2012Metric | R35, R49 |
| 2 | 1,000pF | TxRx_Switch:C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C65, C66 |
| 2 | 100Ω | TxRx_Switch:0805_2012Metric | R11, R12 |
| 2 | 1kΩ | TxRx_Switch:0805_2012Metric | R22, R23 |
| 2 | 22 Ω | TxRx_Switch:0805_2012Metric | R16, R59 |
| 2 | 22kΩ | TxRx_Switch:0805_2012Metric | R9, R10 |
| 2 | 2kΩ | TxRx_Switch:0805_2012Metric | R24, R60 |
| 2 | 330Ω | TxRx_Switch:0805_2012Metric | R28, R33 |
| 2 | 4.3kΩ | TxRx_Switch:0805_2012Metric | R18, R20 |
| 2 | 4.7 kΩ | TxRx_Switch:0805_2012Metric | R17, R19 |
| 2 | 74LVC1G125 | Package_TO_SOT_SMD:SOT-23-5_HandSoldering | U9, U24 |
| 2 | ADA4891 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U7, U8 |
| 2 | ADuM4121 | TxRx_Switch:SOIC | U1, U3 |
| 2 | IRLZ44NPBF | Package_TO_SOT_THT:TO-220-3_Vertical | Q3, Q4 |
| 2 | NMA0515DC | TxRx_Switch:Converter_DCDC_Murata_NMAxxxxDC_THT | U2, U4 |
| 1 | 0Ω | TxRx_Switch:0805_2012Metric | R42 |
| 1 | 10 kΩ | Potentiometer_THT:Potentiometer_Bourns_3299W_Vertical | RV2 |
| 1 | 121Ω | TxRx_Switch:0805_2012Metric | R38 |
| 1 | 150 µF | TxRx_Switch:CP_Elec_10x12.6 | C41 |
| 1 | 2.4MΩ | TxRx_Switch:0805_2012Metric | R54 |
| 1 | 220Ω | TxRx_Switch:0805_2012Metric | R36 |
| 1 | 365Ω | TxRx_Switch:0805_2012Metric | R39 |
| 1 | 47µF | Capacitor_Tantalum_SMD:CP_EIA-7343-31_Kemet-D_HandSolder | C52 |
| 1 | 51kΩ | TxRx_Switch:0805_2012Metric | R53 |
| 1 | 56kΩ | TxRx_Switch:0805_2012Metric | R21 |
| 1 | 6.2kΩ | TxRx_Switch:0805_2012Metric | R52 |
| 1 | 74LVC125A | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U18 |
| 1 | 74LVC2G74 | TxRx_Switch:TSSOP-8_3x3mm_P0.65mm | U21 |
| 1 | AD8137 | Package_SO:JEITA_SOIC-8_3.9x4.9mm_P1.27mm | U23 |
| 1 | AD8310 | TxRx_Switch:TSSOP-8_3x3mm_P0.65mm | U22 |
| 1 | Barrel_Jack | TxRx_Switch:BarrelJack_CUI_PJ-037A_Horizontal | J2 |
| 1 | Conn_01x07 | Connector_PinHeader_2.54mm:PinHeader_1x07_P2.54mm_Vertical | J1 |
| 1 | Conn_01x10 | Connector_PinSocket_2.54mm:PinSocket_1x10_P2.54mm_Vertical | J6 |
| 1 | Ferrite bead | Inductor_SMD:L_0805_2012Metric_Pad1.15x1.40mm_HandSolder | FB1 |
| 1 | Green | LED_THT:LED_D5.0mm_IRGrey | D7 |
| 1 | LOGO | TxRx_Switch:CofA | G*** |
| 1 | LT1086-ADJ | Package_TO_SOT_THT:TO-220-3_Vertical | U15 |
| 1 | LTC1540 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U20 |
| 1 | OKR-T/3-W12-C | TxRx_Switch:Converter_DCDC_Murata_OKR-T3-W12_Vertical | U13 |
| 1 | SS14 | Diode_SMD:D_SMA | D1 |
| 1 | SS34 | Diode_SMD:D_SMA | D8 |
| 1 | TC4422 | TxRx_Switch:SM 8-Lead_SOIJ_HandSoldering | U5 |
| 1 | TLE2426 | Package_TO_SOT_THT:TO-92L_HandSolder | U6 |
| 1 | UPduino Rev 3.1 | TxRx_Switch:UPduino_v3p1_Module_48Pin_Alt | U10 |
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Questions
How big is the SmartSwitch PCB?
It measures 210 × 210 mm and has 4 copper layers, 1.6 mm thick.
What parts does the SmartSwitch use?
187 parts, built around the 74LVC3G17DP, 74LVC1G125, NMA0515DC and 74LVC125AD. 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 SmartSwitch KiCad files?
From the Joe-Purvis/UFE repository on GitHub, at the commit this page was made from: the board is SmartSwitch/KiCad/MainBoard/SmartSwitch.kicad_pcb and its schematic SmartSwitch/KiCad/MainBoard/Control.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the SmartSwitch design in my own project?
Its repository states no licence, so its author keeps all rights: ask Joe-Purvis before reusing the design.