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A project log for Arduino Mega Expansion board

A mini shield-like add-on for the Arduino Mega designed to add wifi/Bluetooth connectivity and more alongside the standard Uno-sized shield.

craig-hissettCraig Hissett • 05/02/2017 at 15:46•5 Comments

Having semi-finalised the idea in my head I thought it was time to take a note of it, before I forget or change my mind again :-)

Here's what I have come up with:

This is a very primitive drawing done using Microsoft Paint so please excuse the roughness of it.

The board will fit over the lower end of the Mega, plugging into the communication pins, digital pins and analog pins. The mounting holes are there for guidance.

The ESP8266 & Bluetooth modules will be soldered underneath, overlapping the board somewhat. The overhang would fit under the arduino shield mounted alongside it.

On the top there are banks of pins:

I would also like to add the option to connect an external power source to help power all the potential extra devices if necessary.

If anyone is interested in helping me produce a board that would be greatly appreciated! ( @davedarko, nudge nudge, wink wink ;-) ) that would be amazing!

Cheers
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Discussions

davedarko wrote 05/02/2017 at 20:56 • point

hmmm. Placing the boards right where the pinheaders are is a bit tricky ;)

Esp12 or esp01?

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Craig Hissett wrote 05/02/2017 at 21:03 • point

Ha ha, I never said my drawing was feasible :-)

Obviously the bottom-mounted boards can go anywhere to fit, and the headers on the top can also go anywhere too. For the ESP I am easy; whichever one is lower profile and easier to use for you :-)

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davedarko wrote 05/02/2017 at 21:08 • point

They are so neatly arranged - I was unsure ;)

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Craig Hissett wrote 05/02/2017 at 21:12 • point

Thank you for noticing :-)

I was just aiming to demonstrate a group of i2c, analog and digital pins for ease of use, heh heh.

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Craig Hissett wrote 05/02/2017 at 19:03 • point

Note to self: look at ESP32 to handle both Bluetooth and Wifi over one serial connection. Will leave one serial port free to be broken out ok top of board.

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