2 layers65 × 30 mm
Max3421e rpi uhat
StarGate01/max3421e-rpi-uhat
A uHAT for the Rapberry Pi (Zero), which adds a second USB 2.0 controller over SPI, using the MAX3421E chip.
23 parts1MPL-2.0
2 layers38.1 × 63.5 mm
USB Switch
emwjacobson/USB_Wifi_SwitchThis project aims to create a wifi-enabled module containing 2 individually switchable USB ports.
- Size
- 38.1 × 63.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 31
- Nets
- 43
- Pads
- 128
- Tracks, vias
- 175, 35
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 14 Oct 2022
- Updated
- 16 Jun 2023
Overview
USB Switch is an open-source printed circuit board by emwjacobson, from the emwjacobson/USB_Wifi_Switch repository on GitHub. It is a 2-layer board of 38.1 × 63.5 mm with 31 parts on 43 nets, routed with 175 tracks and 35 vias.
It is built around the ESP-12F(ESP8266MOD), AMS1117-3.3 and RC0603JR-0710KL, with the 201007F100LT4E, RC0603FR-07330RL and 19-217/GHC-YR1S2/3T among its other parts. Its parts include 11 resistors, 6 capacitors, 5 connectors, 4 ICs and 2 diodes. It belongs with the ESP8266 boards of this library.
Main components
10
ESP-12F(ESP8266MOD)
SMD,24x16mm-40℃~+85℃ -90dBm 120mA 16dBm 170mA 2.4GHz 3.3V ESP8266 Chip On-board PCB Antenna Over-the-air (OTA) update UART、SPI、I2C SMD,24x16mm WiFi Modules ROHSAi-ThinkerWiFi 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
RC0603JR-0710KL
UncategorisedUnknown maker
201007F100LT4E
2010-55℃~+155℃ 100mΩ 200V 750mW Thick Film Resistor ±1% ±800ppm/℃ 2010 Chip Resistor - Surface Mount ROHSUNI-ROYALChip Resistor - Surface MountRC0603FR-07330RL
UncategorisedUnknown maker
19-217/GHC-YR1S2/3T
0603-40℃~+85℃ 110mW 120° 199mcd 20mA 3.3V 518nm 520nm~535nm Discrete Diode Emerald Green Water Clear 0603 LED Indication - Discrete ROHSEverlight ElectronicsLED Indication - Discrete
YJL3400A
SOT-23(TO-236)-55℃~+150℃ 1 N-channel 1.2W 130pF 30V 36pF 4.8nC@4.5V 5.6A 51mΩ@2.5V 535pF 650mV N-Channel ±12V SOT-23(TO-236) MOSFETs ROHSYangzhou Yangjie Electronic TechnologyMOSFETs
904-131A2032S10100
SMD1 1.5A 13.6mm 1500 Cycles 30V 4P Female Surface Mount, Right Angle Type-A USB 2.0 SMD USB Connectors ROHSJing Extension of the Electronic Co.USB Connectors
TS-1187A-B-A-B
SMD-4P,5.1x5.1mm-30℃~+85℃ 1.5mm 1.6N 100,000 cycles 12V 5.1mm 5.1mm 50mA Gold No Round Button SPST Surface Mount,Vertical Without Bracket SMD-4P,5.1x5.1mm Tactile Switches ROHSXKB ConnectionTactile Switches
U217-041N-4BV81
SMD-40℃~+85℃ 1 1.5A 18.8mm 4P Male Surface Mount, Right Angle Type-A SMD USB Connectors ROHSXKB ConnectionUSB Connectors
README
README.mdUSB Wifi Switch
This project aims to create a wifi-enabled module containing 2 individually switchable USB ports.
There are software-programmable LEDs that can be used to show the current status of each port.
Schematics
The design is broken up into 2 parts, the MOSFET board and the Control board. In the assembled product, these are connected using headers to create a 2-layered design.
Control Board
The control board consists of the ESP8266 module that controls the LEDs as well as the 2 MOSFETs on the MOSFET board.
MOSFET Board
As the name implies, this is the board that holds 2 copies of the power switching circuit as well as a 3.3v regular for the Control board.
Switch Circuits
There are 2 copies of this circuit, as shown in the MOSFET Board schematic. The switch circuit contains
PCB
The PCB design was made as a single-sided component design, as it's easy enough for me to hand-assemble with a hot-air reflow station.
There is a v-score that is intended to be used to split the board into it's two halves and stacked with headers.
Rendering
Currently I have an older version assembled and working on auto-charging a tablet I use as a Home Assistant dashboard. That board is v0.1.2, and does not have correct voltage reading. When I ver v0.2.0 ordered and assembled, I hope to post a photo of it.
I do have images of an even older version, v0.1, that I have since disassembled and reworked to be the v0.1.2 board that I currently use.
Parts
31| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 10k | Resistor_SMD:R_0603_1608Metric | R3, R4, R5, R6, R9, R10 |
| 3 | 100nF | Capacitor_SMD:C_0603_1608Metric | C1, C2, C4 |
| 3 | 10uF | Capacitor_SMD:C_0603_1608Metric | C3, C5, C6 |
| 2 | 100m | Resistor_SMD:R_2010_5025Metric | R1, R2 |
| 2 | 330 | Resistor_SMD:R_0603_1608Metric | R7, R8 |
| 2 | GREEN | LED_SMD:LED_0603_1608Metric | D1, D2 |
| 2 | INA219AxD | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U2, U3 |
| 2 | Q_NMOS_GDS | Library:YJL3400A | Q1, Q2 |
| 2 | USB_OUT | Library:904-131A2032S10100 | J3, J5 |
| 1 | 100 | Resistor_SMD:R_0603_1608Metric | R11 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U1 |
| 1 | Conn_01x06 | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J1 |
| 1 | Conn_01x08 | Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical | J4 |
| 1 | ESP-12F | RF_Module:ESP-12E | U4 |
| 1 | PRGM | Library:TS-1187A-B-A-B | SW1 |
| 1 | USB_IN | Library:U217-041N-4BV81 | J2 |
Similar boards
- 4 layers49.5 × 21.6 mm
USB Replug Dongle RevC1
gslee-dev/portpulse
USB replug test dongle with KiCad hardware, CH552 firmware, and native C host
38 partsMIT - 4 layers60 × 90 mm
- 2 layers95 × 95 mm
- 2 layers24.4 × 190.2 mm
- 2 layers40 × 75 mm
- 4 layers100 × 68 mm
- 4 layers33.5 × 66.8 mm
Net bmp
elagil/net-bmp
An Ethernet-connected SWD/JTAG debug adapter (blackmagic probe)
97 parts3GPL-3.0
Questions
How big is the USB Switch PCB?
It measures 38.1 × 63.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the USB Switch use?
31 parts, built around the ESP-12F(ESP8266MOD), AMS1117-3.3, RC0603JR-0710KL and 201007F100LT4E. 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 USB Switch KiCad files?
From the emwjacobson/USB_Wifi_Switch repository on GitHub, at the commit this page was made from: the board is USB_Switch.kicad_pcb and its schematic USB_Switch.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the USB Switch design in my own project?
Its repository states no licence, so its author keeps all rights: ask emwjacobson before reusing the design.