And another board

And another board, just works.

One of the designs I made a while ago was a very small "generic" ESP32-WROOM-32 module. It had a 6 pin connector (normally a SPOX 2.5mm, but can be 0.1" headers). It was GND and 5 GPIO pins. It really was tiny, and has proved very useful.

But occasionally I need more pins, and a full size general dev board is much more bulky.

So I made a Mk2 that is a bit bigger. 2x8 pins, all of which can be GPIO. By default one each side is GND, and the next ones can be linked to DC supply or 3.3V. 6 of the 8 have BAV99 diodes for ESD protection as well. The whole thing can be powered from DC contacts (4V-40V) or a USB-C lead. The USB does serial to make easy to load code, and there is an RGB LED as well.

It is still pretty small, but a bit more useful.

1 comment:

  1. I was doing some research after reading about your modules (they look very nice and neat to me) and came across this article:


    that says that BAV99 diodes "on their own" do not actually protect against ESD. Something like a dedicated TVS (Transient Voltage Suppressor) diode like this one:


    might be a better choice in future designs.

    Best regards,


Comments are moderated purely to filter out obvious spam, but it means they may not show immediately.

A sign of the times

There is an old road sign on Belmont Road, Abergavenny. Old, and rusty, and not even that easy to read. It was worse, it was covered in ivy,...