I had planned to step down 12V supply to 5V and then feed in to the 5V pin and i ahve teh regulator to do this ready and waiting.
however reading this
it says as below "The recommended range is 7 to 12 volts" I am just wondering if any one has actually tried this an not fried their device, i still planning the external regulator unless anyone has evidence that the pin clearly labeled 5v does indeed support 12v without frying its self.
Microcontroller: Tensilica 32-bit RISC CPU Xtensa LX106
Operating Voltage: 3.3V
Input Voltage: 7-12V
Digital I/O Pins (DIO): 11
Analog Input Pins (ADC): 1
Flash Memory: 4 MB
SRAM: 64 KB
Clock Speed: 80 Mhz
Wi-Fi: IEEE 802.11 b/g/n:
Integrated TR switch, balun, LNA, power amplifier and matching network
WEP or WPA/WPA2 authentication, or open networks
Power to the Wemos D1 Mini is supplied via the on-board USB Micro B connector or directly via the “VIN” pin. The power source is selected automatically.
The device can operate on an external supply of 6 to 20 volts. If using more than 12V, the voltage regulator may overheat and damage the device. The recommended range is 7 to 12 volts."