wemos-mains-dev

Board to combine a Wemos D1 Mini with a mini power supply

This is a small board that can take a Wemos D1 Mini together with a 5V mini power supply to obtain a W-Lan microcontroller board with IO pins able to put e.g. in a switch box and power it directly from mains

It contains the following elements:

• WeMos D1 Mini (or any other microcontroller board that has the same pin configuration)
• A 600mA/5V (3W) power supply
• A 2x12 pinheader providing all GPIO Pins of the D1 mini in a suitable configuration
• Pull-Up Resistors for the SDA and SCL line
• Jumper Pins to select if the pullups should be used or not
• ByPass Capacitors for the 3V3 and GND lines in vicinity to the One-Wire and analog pin
• Screw Terminal to connect the board to mains

Features

The breakout of the pins is designed in a way that it can support HATs of a certain form factor. So far I have designed the following HATs which you can find here:

• RJ11 Socket HAT chof747/rj11-wemos-hat

Revision History:

• v1.0: Initial version (filed for fabrication: 19.04.2023)
• v1.1: Revision 1 with corrected orientation of power supply and reduced ground plane to avoid collision with high voltage (filed for fabrication: 17.7.2023; First Assembly 06.10.2023)