2 layers51 × 21 mm
Mitayi Pico D1
CIRCUITSTATE/Mitayi-Pico-D1
Open-Source RP2040 Microcontroller Development Board
75 parts36MIT
2 layers50.8 × 18.1 mm
Smart usb switch
sowbug/smart-usb-switch22An ESP8266-based smart USB type-A switch
- Size
- 50.8 × 18.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 10
- Nets
- 28
- Pads
- 60
- Tracks, vias
- 116, 3
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 10 Dec 2019
- Updated
- 18 Sep 2020
Overview
Smart usb switch is an open-source printed circuit board by sowbug, from the sowbug/smart-usb-switch repository on GitHub. It is a 2-layer board of 50.8 × 18.1 mm with 10 parts on 28 nets, routed with 116 tracks and 3 vias.
It is built around the ESP-12F and MIC5219-3.3YM5-TR. Its parts include 4 connectors, 2 ICs, 2 switches, 1 resistor and 1 transistor. It belongs with the ESP8266 boards of this library.
Main components
2
ESP-12F
SMD,24x16mm-40℃~+85℃ -96dBm 15dBm 2.4GHz 3.3V 375mA 55mA PCB UART WIFI4 SMD,24x16mm WiFi Modules ROHSDOITWiFi Modules
MIC5219-3.3YM5-TR
SOT-23-5-40℃~+125℃@(Tj) 1 12V 170uA 3.3V 500mA 600mV@(500mA) 75dB@(120Hz) Fixed Over Current Protection、Over Temperature Protection、Enable Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMicrochip TechnologyVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
README.mdsmart-usb-switch
An inline USB type-A power switch that's controlled by an ESP8266 (ESP-12F) on GPIO4. You can load this device with any firmware you want, including for example ESPHome.
Version 2 has two buttons on the back. If you build this board yourself, you can put 0, 1, or 2 of the button components in place.
The PCB could probably be a little smaller, but the ESP-12F takes up a lot of real estate.
How to program
These instructions are for ESPHome, but since it's just an ESP8266, you can do anything you want instead.
Soldering jumper pins on the terminal points is optional. Get ESPHome ready with
a .yaml file like the one included in this project. Connect the PROG terminals
to each other. Using a USB-TTL adapter that is configured to use 3.3-volt logic
levels, connect GND, 3V3, TX, RX (in other words, match up the labels on the
USB-TTL adapter with the ones on the smart switch, but connect RX to TXD and TX
to RXD). Then build the ESPHome image and upload with
esphome your-config.yaml run or however else you use ESPHome.
Bill of Materials
See smart-usb-switch.csv.
Parts
10| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | SW_Push | Button_Switch_SMD:SW_SPST_SKQG_WithStem | SW1, SW2 |
| 1 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J4 |
| 1 | Conn_01x04 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J3 |
| 1 | DMN6140L-13 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | ESP-12F | RF_Module:ESP-12E | U1 |
| 1 | MIC5219-3.3YM5-TR | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | R10K | Resistor_SMD:R_0805_2012Metric | R1 |
| 1 | USB_A | Connector_USB:USB_A_Stewart_SS-52100-001_Horizontal | J2 |
| 1 | USB_A | Connector_USB:USB_A_CNCTech_1001-011-01101_Horizontal | J1 |
Questions
How big is the Smart usb switch PCB?
It measures 50.8 × 18.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Smart usb switch use?
10 parts, built around the ESP-12F and MIC5219-3.3YM5-TR. 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 Smart usb switch KiCad files?
From the sowbug/smart-usb-switch repository on GitHub, at the commit this page was made from: the board is smart-usb-switch.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Smart usb switch design in my own project?
Its repository states no licence, so its author keeps all rights: ask sowbug before reusing the design.
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