Wemos / LOLIN D1 Mini Screw Terminal Breakout

Wemos / LOLIN D1 Mini / Mini Pro Screw Terminal Breakout, for mounting the LOLIN D1 Mini board.

GitHub repository at Tecsmith/arduino-wemos-d1-screw-terminal

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Specifications

• Simple breakout in the Qwiic board form factor exposing D1 Mini pins to screw terminals
• 2x Qwiic connectors (works with SparkFun’s Qwiic Connect System)
• Standard I²C breakout pins
• Reset button and remote reset button via JST-PH-2 header
• Optional 5V Voltage Regulator for use with higher voltages
  • It’s recommended to use a Pololu 5V Step-Up/-Down V-Regulator S10V4F5
  • Must CUT JP1 if Voltage Regulator is used!!

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On Board Jumpers

JP1 - Optional 5V Voltage regulator (bottom)

Input voltage must abide by Wemos limit (ME6211 = 6V max), or you can solder in a 5V Voltage Regulator.

1. JP1 is by default TIED (shorting out V-Reg In and Out Pins). This must be cut if the Voltage Regulator is installed.

2. One can also use the JP1 pins, with ties cut, as a remote ON/OFF switch (but with no Voltage Regulator).

JP2 - I²C Pull Ups (top)

• Connected (default): 4.7KΩ pullups
• Cut both sides: No pullups

JP3 - LED Enable (top)

• Connected (default): LED shows power state
• Cut: LED disabled

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Manufacturing

• Schematic print: wemos-d1-screw-terminal-v1.0.pdf
• Schematic source (in EAGLE): Tecsmith/arduino-wemos-d1-screw-terminal/EAGLE/wemos-d1-screw-terminal-v1.0.sch
• PCB design (in EAGLE): Tecsmith/arduino-wemos-d1-screw-terminal/EAGLE/wemos-d1-screw-terminal-v1.0.brd

Top	Bottom

Initial prototype built by JCLPCB

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