2 layers
Sense board 25mm v2
aechoi/smart-suction
Repository for evaluating data collected for the smart suction cup project.
8 parts
2 layers23.5 × 23.5 mm
Measure board v3
aechoi/smart-suctionRepository for evaluating data collected for the smart suction cup project.
- Size
- 23.5 × 23.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 19
- Nets
- 27
- Pads
- 95
- Tracks, vias
- 193, 17
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 22 Feb 2025
- Updated
- 2 Sep 2026
Overview
Measure board v3 is an open-source printed circuit board by aechoi, from the aechoi/smart-suction repository on GitHub. It is a 2-layer board of 23.5 × 23.5 mm with 19 parts on 27 nets, routed with 193 tracks and 17 vias.
It is built around the ADG734BRU. Its parts include 4 connectors, 3 ICs, 2 capacitors and 2 resistors.
Main components
1README
README.mdsmart-suction
Single source of truth for the smart suction cup project — a suction cup end effector that senses contact and alignment from capacitance changes across eight electrodes.
smart-suction/
├── hardware/ KiCad sources for the sense boards and interconnect PCBs
├── firmware/ ESP32 end-effector firmware
├── software/ live capture, analysis, models
└── docs/ diagrams and notesEach part has its own README with setup and usage.
How the pieces fit
graph LR
S[AD7746 CDC + 8 electrodes] -->|I2C| E[ESP32 + Ethernet PHY]
E -->|UDP over PoE| H[Host PC: capcup.udp_receiver]
H --> A[Analysis notebooks / models]The end effector (firmware/) samples eight capacitance channels and streams
40-byte UDP packets to a host PC. software/ records them and runs the
analysis and position-estimation models.
How to record data
You will need:
- 1x PoE injector
- 2x ethernet cables
- 1x computer with
software/installed
graph LR
A[Outlet] -->|Power| B[PoE Injector]
B <-->|LAN — ethernet| C[Host PC]
B <-->|LAN + DC — ethernet| D[End Effector]Then, from software/, run python -m capcup.udp_receiver -f my_capture.
Two windows open: a rolling time-domain plot and a radial plot.
Parts
19| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | Conn_01x01_Socket | Connector_PinSocket_2.54mm:PinSocket_1x01_P2.54mm_Vertical | JS1, JS2, JS3, JS4, JS5, JS6, JS7, JS8 |
| 2 | 4.7k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2 |
| 2 | ADG734 | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U2, U3 |
| 2 | Conn_01x02_Pin | custom_fp_library:CON_spring_00-9155-00X-85X-00X_KYOCERA | J3, J4 |
| 2 | Conn_01x08 | custom_fp_library:CON_525590870_MOL_8pv | J1, J2 |
| 1 | 0.1u | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C2 |
| 1 | 10u | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1 |
| 1 | AD7746 | Package_SO:TSSOP-16_4.4x5mm_P0.65mm | U1 |
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Questions
How big is the Measure board v3 PCB?
It measures 23.5 × 23.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Measure board v3 use?
19 parts, built around the ADG734BRU. 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 Measure board v3 KiCad files?
From the aechoi/smart-suction repository on GitHub, at the commit this page was made from: the board is hardware/measure_board_v3/measure_board_v3.kicad_pcb and its schematic hardware/esp_pin_to_ribbon/esp_pin_to_ribbon.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Measure board v3 design in my own project?
Its repository states no licence, so its author keeps all rights: ask aechoi before reusing the design.