QuinLED-ESP32 Board Details
The QuinLED-ESP32 custom version is based around the D1 Mini32 form factor that is for sale in a lot of places. It has a few differences though in philosophy and used components. This article will show the board limits and the pinout of the board (which is also labelled on the board itself).
Board Power limits
To try and protect the board from dying a premature death, the board employs two precautions.
First off, the USB port has a ESD protection chip first, this should protect the onboard circuits from any ESD power spikes.
Second is that there is a PTC fuse on board which has a “power hold” limit of 750mA. Generally speaking this will more then enough to run any normal application. This also means this board is explicitly not meant for running LEDs or a big load “through” the board. Any load higher then 750mA for a few seconds will trigger the PTC and cut off all the power to the board to prevent any potential damage.
I am not great at making those fancy pinout graphics you sometimes see, I’ll try in the future!
For now please see the following photo:
4×9 pins, not 4×10 pins!
The first difference is that the board isn’t 4×10 pins but 4×9 pins. The pins removed are connected to the internal flash memory of the WROOM ESP32 module and serve no real-world usage but this might still be important to note when plugging this board into a header designed for the 4×10 pins, skip the first pin on the USB side of the board!
As noted on the board, the pins marked with a * are added over the original Mini32 design. They are either extra or have changed in function.
There are three pins, all in the most right row (looking from the back). These are an extra GND* pin on the top, and a 3v3* and 5vF* at the bottom of the right row. GND and 3v3 are connected to their equivalently named pins but 5vF is unique because it’s run through the onboard PTC to offer extra protection for whatever is connected.
*If you are using this board as a compatible replacement to the normal D1 Mini32 board, please do not solder these pins to prevent any unexpected problems!
Although this board is tightly integrated with my custom boards I’m selling, they aren’t solely meant for that purpose, they are still general purpose development boards just with my twist on it and some uniquely added features! Without the extra * pins soldered, they are 100% compatible with all other projects out there, or perfectly suitable for the project you are doing yourself and might want to have external antenna capability or make use of the Ethernet option!