2 layers325.5 × 240.1 mm
2 layers171.7 × 160.5 mm
Slider rev 1 0
second-string/capacitive-touch-slider-board-prototypeProtoype hardware and firmware for evaluating different designs of capacitive touch sliders
- Size
- 171.7 × 160.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 159
- Nets
- 172
- Pads
- 509
- Tracks, vias
- 857, 142
- Pours
- 18
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 19 Oct 2024
- Updated
- 19 Oct 2024
Overview
Slider rev 1 0 is an open-source printed circuit board by second-string, from the second-string/capacitive-touch-slider-board-prototype repository on GitHub, published under the MIT licence. It is a 2-layer board of 171.7 × 160.5 mm with 159 parts on 172 nets, routed with 857 tracks and 142 vias.
It is built around the AT42QT2160-MMU, AT42QT2120-XU and 74HCT595D. Its parts include 95 resistors, 16 diodes, 16 transistors, 11 connectors and 7 capacitors.
Main components
3
AT42QT2160-MMU
VQFN-28(4x4)-40℃~+85℃ 1.8V~5.5V 16 PWM Control、自动灵敏度校准、防水抗干扰触摸、滑动触摸、矩阵扫描 VQFN-28(4x4) Touch Sensors ROHSMicrochip TechnologyTouch Sensors
AT42QT2120-XU
TSSOP-201.8V~5.5V 12 Capacitive Touch、自动灵敏度校准、防水抗干扰触摸、接近检测、滑动触摸 TSSOP-20 Touch Sensors ROHSMicrochip TechnologyTouch Sensors
74HCT595D
SOIC-16-40℃~+125℃ 1 25ns@4.5V,50pF 30MHz 4.5V~5.5V 500mW 6mA 74HCT 8 Serial-to-Serial or Parallel Tri-State SOIC-16 Shift Registers ROHSNexperiaShift Registers
README
README.mdcapacitive-touch-slider-board-prototype
This repo contains a design for a prototype PCB for testing different capacitive touch slider designs. For more information on the different slider footprints, see writeup.
There is a schematic PDF and PCB layer prints PDF in the version 1.0 directory if you do not have KiCad. There are also Excel and interactive BOMs in the bom/ subdirectory.
Reach out if you would like the KiCad slider schematic symbol and footprint files, they are saved in my global library and so not directly accessible from the project directory.
There is test firmware in slider-board_rev_1_0/bringup_firmware/. NOTE: This firmware is sloppy, terribly written, inefficient, and everything is hardcoded. It is only included as a reference, do not think that this will work for you out of the box.
Videos of example behavior are in the img/ directory.
Parts
159| Qty | Value | Footprint | References |
|---|---|---|---|
| 32 | 1k2 | Resistor_SMD:R_0603_1608Metric | R11, R12, R13, R15, R16, R18, R19, R21, R22, R23, R24, R26, R27, R28, R29, R31 +16 |
| 18 | 1k | Resistor_SMD:R_0603_1608Metric | R14, R20, R25, R30, R33, R35, R36, R60, R61, R62, R63, R64, R65, R66, R67, R68 +2 |
| 16 | 470R 1/2W | Resistor_SMD:R_0603_1608Metric | R69, R70, R71, R72, R73, R74, R75, R76, R77, R78, R79, R80, R81, R82, R83, R84 |
| 16 | LED | LED_SMD:LED_SunLED_XZ_Reverse_Mount | D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, D16 |
| 16 | Q_NMOS_GSD | Package_TO_SOT_SMD:TSOT-23 | Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, Q10, Q11, Q12, Q13, Q14, Q15, Q16 |
| 8 | 10k | Resistor_SMD:R_0603_1608Metric | R4, R5, R6, R37, R38, R95, R96, R97 |
| 8 | 2k4 | Resistor_SMD:R_0603_1608Metric | R8, R10, R32, R34, R39, R40, R58, R59 |
| 6 | 2k | Resistor_SMD:R_0603_1608Metric | R85, R86, R87, R92, R93, R94 |
| 5 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C1, C2, C4, C6, C7 |
| 4 | 1k5 | Resistor_SMD:R_0603_1608Metric | R88, R89, R90, R91 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_DIN965_Pad | H1, H2, H3, H4 |
| 3 | 47k | Resistor_SMD:R_0603_1608Metric | R1, R17, R48 |
| 3 | Conn_01x03_Pin | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J2, J4, J5 |
| 3 | Jumper_3_Bridged12 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | JP1, JP2, JP3 |
| 3 | ~ | Button_Switch_SMD:Cap_Touch_Ring_Small | P2, P5, P6 |
| 2 | 4.7nF | Capacitor_SMD:C_0603_1608Metric | C3, C5 |
| 2 | 74HCT595 | Package_DFN_QFN:DHVQFN-16-1EP_2.5x3.5mm_P0.5mm_EP1x2mm | U4, U5 |
| 2 | AT42QT2160-MMU | Package_DFN_QFN:VQFN-28-1EP_4x4mm_P0.45mm_EP2.4x2.4mm_ThermalVias | U2, U3 |
| 2 | TestPoint | TestPoint:TestPoint_Pad_D3.0mm | TP1, TP2 |
| 1 | AT42QT2120 | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U1 |
| 1 | Conn_01x02_Pin | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J3 |
| 1 | Slider_Resistive_3P_1L | Touch:Slider_ResistiveInterpolation_3P_1L | P7 |
| 1 | Slider_Spatial_3P_1L | Touch:Slider_SpatialInterpolation_3P_1L | P1 |
| 1 | ~ | Touch:Slider_ResistiveInterpolation_7P_2L | P8 |
| 1 | ~ | Touch:Slider_ResistiveInterpolation_Thin_7P_2L | P9 |
Questions
How big is the Slider rev 1 0 PCB?
It measures 171.7 × 160.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Slider rev 1 0 use?
159 parts, built around the AT42QT2160-MMU, AT42QT2120-XU and 74HCT595D. 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 Slider rev 1 0 KiCad files?
From the second-string/capacitive-touch-slider-board-prototype repository on GitHub, at the commit this page was made from: the board is slider-board_rev_1_0/slider_rev_1_0.kicad_pcb and its schematic slider-board_rev_1_0/3-pad-sliders.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Slider rev 1 0 design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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