A project log for AutomaTales

Tales on my home automation project

SUFSUF 04/09/2016 at 07:090 Comments

As I'm thinking further, it become obvious that I want to create a modular system. Something like a backplane, with equaly sized modules, the sensors, the actuators, the MCU, and the power source also reside on separate modules.

Even I went further. Designed a box, the backplane and the module form factor already. The modules will be implemented in 5x5cm form factor. Why? Because this can be cheaply ordered from the Chinese PCB factories - ~$10 for 10pcs.

The planed module connector has 1 SPI, 1 I2C and 8 GPIO connections. This is 17 pins together with the two power rails (3.3V and 5V). A 17 pin 0.1" single row header fits onto the 5cm edge of the board.

As I'm going further with it, I came up with quite a few modules, I want to implement. The list isn't complete, and the modules are subject to change:

In addition I plan to design Backplane for 4, 6 and 8 modules. The backplane will have an additional connector, what is able to connect the whole thing to a BeagleBone CAPE. This means, I'll able to use this modular system for the BBG based OpenHAB central also.

I also adding parametric 3D printable enclosure for it.

Some of the modules already designed. Although it can be ordered from a fab, but all of the designs ready until today uses single sided board, what can be easily created at home with toner transfer. Most (not all) of the designs uses exclusively trough hole components, what make the life easier.