4 layers90 × 90 mm
4 layers33.6 × 18 mm
Cap sense ctrl
gregdavill/cap-sense-flex11A prototype of a flex measuring sensor. Based off: https://dl.acm.org/doi/10.1145/3313831.3376269
- Size
- 33.6 × 18 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 43
- Nets
- 67
- Pads
- 196
- Tracks, vias
- 543, 86
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20200628)
- Created
- 19 Jun 2020
- Updated
- 6 Jul 2024
Overview
Cap sense ctrl is an open-source printed circuit board by gregdavill, from the gregdavill/cap-sense-flex repository on GitHub. It is a 4-layer board of 33.6 × 18 mm with 43 parts on 67 nets, routed with 543 tracks and 86 vias.
It is built around the ATSAMD21E18A-AF and TMUX1511PW. Its parts include 8 resistors, 7 capacitors, 5 ICs, 4 diodes and 4 transistors. It belongs with the SAM D and SAM boards of this library.
Main components
2
ATSAMD21E18A-AF
TQFP-32(7x7)-40℃~+125℃ 1.62V~3.6V 10bit 12bit 256KB 26 32 Bit 32KB 48MHz ARM Cortex-M0+ Built-in FLASH TQFP-32(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
TMUX1511PW
TSSOP-14-40℃~+125℃ 1.5V~5.5V 1:1 3.3pF 3GHz 4 4.5Ω 4us 60us Bidirectional analog channel、Power-off isolation、Fail-safe disconnect TSSOP-14 Analog Switches, Multiplexers ROHSTexas InstrumentsAnalog Switches, Multiplexers
README
README.mdCap Sense Flex
A prototype of a flex measuring sensor. Based off: https://dl.acm.org/doi/10.1145/3313831.3376269
This design will attempt to utilise OSHPark Flex for the sensor elements, which provides a low cost solution for prototyping flexible circuits. But you are limited to a 5mil polymide core.
Parts
43| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 0.1uF | Capacitor_SMD:C_0402_1005Metric | C2, C5, C6, C7 |
| 4 | LED_ARGB | LED_SMD:LED_Lumex_SML-LX0303SIUPGUSB | D1, D2, D3, D4 |
| 4 | MountingHole | MountingHole:MountingHole_2.2mm_M2 | H1, H2, H3, H4 |
| 4 | Q_PMOS_GSD | Package_TO_SOT_SMD:SOT-883 | Q1, Q2, Q3, Q4 |
| 3 | 1K | Resistor_SMD:R_0402_1005Metric | R6, R7, R8 |
| 2 | 150R | Resistor_SMD:R_0402_1005Metric | R2, R3 |
| 2 | 1uF | Capacitor_SMD:C_0402_1005Metric | C1, C4 |
| 2 | 5.1K | Resistor_SMD:R_0402_1005Metric | R4, R5 |
| 2 | Conn_01x08_MountingPin | Connector_FFC-FPC:Hirose_FH12-8S-0.5SH_1x08-1MP_P0.50mm_Horizontal | J2, J3 |
| 2 | TMUX1511 | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U4, U5 |
| 1 | 10uF | Capacitor_SMD:C_0402_1005Metric | C3 |
| 1 | 360R | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | AD7746 | Package_SO:TSSOP-16_4.4x5mm_P0.65mm | U1 |
| 1 | ATSAMD21E18A | Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.6x3.6mm | U3 |
| 1 | MCP1700-3302E_SOT23 | Package_TO_SOT_SMD:SOT-23 | U2 |
| 1 | SW_RESET | Button_Switch_SMD:SW_SPST_PTS810 | SW1 |
| 1 | TP_GND | TestPoint:TestPoint_Pad_D1.0mm | TP4 |
| 1 | TP_RESET | TestPoint:TestPoint_Pad_D1.0mm | TP7 |
| 1 | TP_SWCLK | TestPoint:TestPoint_Pad_D1.0mm | TP1 |
| 1 | TP_SWDIO | TestPoint:TestPoint_Pad_D1.0mm | TP2 |
| 1 | TP_USB_D+ | TestPoint:TestPoint_Pad_D1.0mm | TP6 |
| 1 | TP_USB_D- | TestPoint:TestPoint_Pad_D1.0mm | TP5 |
| 1 | TP_VDD | TestPoint:TestPoint_Pad_D1.0mm | TP3 |
| 1 | USB_C_Receptacle_USB2.0 | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
Questions
How big is the Cap sense ctrl PCB?
It measures 33.6 × 18 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Cap sense ctrl use?
43 parts, built around the ATSAMD21E18A-AF and TMUX1511PW. 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 Cap sense ctrl KiCad files?
From the gregdavill/cap-sense-flex repository on GitHub, at the commit this page was made from: the board is hardware/cap-sense-ctrl-r0.1/cap-sense-ctrl.kicad_pcb and its schematic hardware/Rx-r0.1/Rx.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Cap sense ctrl design in my own project?
Its repository states no licence, so its author keeps all rights: ask gregdavill before reusing the design.
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