Raspberry PI and GPIO pins: Implementing automation in an affordable manner [Part II]

In the previous post on affordable home automation based on Raspberry PI, we learned to control connections of the power grid from home plate eight relays connected to our Raspberry PI.

Today we will see how to control a total of sixteen electrical appliances thanks to the circuit previously implemented, y a las placas facilitadoras que me ha prestado Jordi de @electronics.cat que ya pudísteis ver en el resumen del Hardware Freedom Day; diseñadas por el mismo, and one hundred percent free hardware.

For this practice I use the three branches pi, it will adapt all GPIO pins Raspberry PI de 3.3V a 5V bidireccionalmente y nos permitirá trabajar con el segundo bus I2C reservado para la PiCam; también emplearé la placa de relés optoacoplados que utilicé en el anterior artículo sobre domótica.

All this makes available a total of sixteen sockets domotizados spread between two Raspberry Pi, and expandability up 128 in the case of pi 3 branches, because it allows us to leverage the two I2C buses sacrificing the ability to use the connector for PICAM.

Read the tutorial | Peatonet

Autor: Antonio Mónaco

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