2 layers62 × 26 mm
4 layers76.7 × 66.3 mm
Cap touch starter
cmumford/cap-touch-starterSimple ESP32 based board design supporting a capacitive touch screen
- Size
- 76.7 × 66.3 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 60
- Nets
- 108
- Pads
- 288
- Tracks, vias
- 616, 67
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 13 Nov 2021
- Updated
- 17 Mar 2022
Overview
Cap touch starter is an open-source printed circuit board by cmumford, from the cmumford/cap-touch-starter repository on GitHub, published under the MIT licence. It is a 4-layer board of 76.7 × 66.3 mm with 60 parts on 108 nets, routed with 616 tracks and 67 vias.
It is built around the ESP32-WROVER-E(4MB), AMS1117-3.3 and SS8050-G, with the BAT760-7 and SP0503BAHTG among its other parts. Its parts include 20 resistors, 9 capacitors, 6 diodes, 4 ICs and 3 connectors. It belongs with the ESP32 boards of this library.
Main components
5
ESP32-WROVER-E(4MB)
SMD,18x31.4mmSMD,18x31.4mm WiFi Modules ROHSEspressif SystemsWiFi Modules
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
SS8050-G
SOT-231 NPN 1.5A 100 100MHz 100nA 25V 300mW 400mV 5V NPN SOT-23 Bipolar (BJT) ROHSComchipBipolar (BJT)
BAT760-7
SOD-323Schottky DiodesDOWO
SP0503BAHTG
SOT-143-55℃~+125℃ 10A@8/20us 14V 150W@8/20us 30pF、60pF 5.5V 6V 80nA ESD IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 Three channels Unidirectional SOT-143 ESD and Surge Protection (TVS/ESD) ROHSTECH PUBLICESD And Surge Protection (TVS/ESD)
README
pcb/README.mdSchematic
Layout
BOM
| Quantity | Description | Value | Package |
|---|---|---|---|
| 3 | Capacitor | 22μF/6.3V | 0603 (1608 Metric) |
| 5 | Capacitor | 0.1μF/50V | 0603 (1608 Metric) |
| 1 | Capacitor | 4.7μF/6.3V | 0603 (1608 Metric) |
| 1 | Diode (Schottsky) | BAT760-7 | SOD-323 |
| 1 | Voltage suppressor | SP0503BAHT | SOT-143 |
| 4 | LED | LED | 0603 (1608 Metric) |
| 1 | USB Type-C Receptacle | 12401548E412A | |
| 1 | 2.8" LCD w/Capacitive Touch | DT280QV10-CT | |
| 1 | Flat pack ribbon cable connector | 62684-502100ALF | 50 pin 0.5 mm pitch |
| 2 | NPN Transistor | SS8050-G | SOT-23 |
| 4 | Resistor | 68Ω | 0603 (1608 Metric) |
| 3 | Resistor | 2KΩ | 0603 (1608 Metric) |
| 1 | Resistor | 22K1Ω | 0603 (1608 Metric) |
| 1 | Resistor | 47K5Ω | 0603 (1608 Metric) |
| 4 | Resistor | 10KΩ | 0603 (1608 Metric) |
| 2 | Resistor | 5K1Ω | 0603 (1608 Metric) |
| 2 | Resistor | 2K2Ω | 0603 (1608 Metric) |
| 1 | ESP32-WROVER-E | ||
| 1 | SPIRAM (8 MB) | LY68L6400SLIT | SOP-8 |
| 1 | Voltage Regulator | AMS1117-3.3 | SOT-223 |
| 1 | Voltage Detector | BD48K33G-TLCT-ND | SOT-23-3 |
| 1 | USB-to-UART bridge controller | CP2102N-A01 | QFN-28 |
| 2 | Tactile pushbutton | ||
| 1 | Slider 1P2T switch | SK-12D07 |
Parts
60| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 0.1μF/50V | Capacitor_SMD:C_0603_1608Metric | C2, C3, C4, C5, C7 |
| 5 | 2KΩ | Resistor_SMD:R_0603_1608Metric | R3, R7, R8, R11, R13 |
| 4 | 10KΩ | Resistor_SMD:R_0603_1608Metric | R6, R9, R10, R12 |
| 4 | 68Ω | Resistor_SMD:R_0603_1608Metric | R16, R17, R18, R19 |
| 3 | 22μF | Capacitor_SMD:C_0603_1608Metric | C6, C8, C9 |
| 2 | 2K2Ω | Resistor_SMD:R_0603_1608Metric | R14, R15 |
| 2 | 5K1Ω | Resistor_SMD:R_0603_1608Metric | R4, R5 |
| 2 | SS8050-G | Package_TO_SOT_SMD:SOT-23 | Q1, Q2 |
| 1 | 22K1Ω | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 39Ω | Resistor_SMD:R_0603_1608Metric | R20 |
| 1 | 3V3 | TestPoint:TestPoint_Pad_D2.5mm | TP4 |
| 1 | 4.7μF/6.3V | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | 47K5Ω | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | 5V | TestPoint:TestPoint_Pad_D2.5mm | TP1 |
| 1 | 62684-50110 | cmumford-footprints:62684-50110 | J3 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U4 |
| 1 | BAT760-7 | Diode_SMD:D_SOD-323 | D2 |
| 1 | BD48K33G-TLCT-ND | Package_TO_SOT_SMD:SOT-23 | U2 |
| 1 | BL | MountingHole:MountingHole_2.2mm_M2 | H2 |
| 1 | BOOT | Button_Switch_THT:SW_PUSH_6mm_H5mm | SW3 |
| 1 | BR | MountingHole:MountingHole_2.2mm_M2 | H4 |
| 1 | CP2102N-Axx-xQFN28 | Package_DFN_QFN:QFN-28-1EP_5x5mm_P0.5mm_EP3.35x3.35mm | U1 |
| 1 | Conn_ARM_JTAG_SWD_10 | Connector_PinHeader_1.27mm:PinHeader_2x05_P1.27mm_Vertical | J2 |
| 1 | EN | Button_Switch_THT:SW_PUSH_6mm_H5mm | SW2 |
| 1 | ESP32-WROVER-E | EspressIf:ESP32-WROVER-IE | U3 |
| 1 | GND | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP2 |
| 1 | MISO | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP6 |
| 1 | MOSI | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP7 |
| 1 | PWR | LED_SMD:LED_0603_1608Metric | D6 |
| 1 | RX | LED_SMD:LED_0603_1608Metric | D4 |
| 1 | SCL | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP5 |
| 1 | SDA | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP3 |
| 1 | SP0503BAHT | Package_TO_SOT_SMD:SOT-143 | D1 |
| 1 | SPI_SCL | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP8 |
| 1 | SW_SPDT | Button_Switch_THT:SW_Slide_1P2T_CK_OS102011MS2Q | SW1 |
| 1 | TL | MountingHole:MountingHole_2.2mm_M2 | H1 |
| 1 | TP_IRQ | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP9 |
| 1 | TR | MountingHole:MountingHole_2.2mm_M2 | H3 |
| 1 | TX | LED_SMD:LED_0603_1608Metric | D3 |
| 1 | USB_C_Receptacle | Connector_USB:USB_C_Receptacle_Amphenol_12401548E4-2A | J1 |
| 1 | UTIL | LED_SMD:LED_0603_1608Metric | D5 |
Questions
How big is the Cap touch starter PCB?
It measures 76.7 × 66.3 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Cap touch starter use?
60 parts, built around the ESP32-WROVER-E(4MB), AMS1117-3.3, SS8050-G and BAT760-7. 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 touch starter KiCad files?
From the cmumford/cap-touch-starter repository on GitHub, at the commit this page was made from: the board is pcb/CapTouchStarter.kicad_pcb and its schematic pcb/CapTouchStarter.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Cap touch starter 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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