Friday, February 07, 2014

RasPi relay action

This shows my RasPi connect via i2c to 2 mcp23017 controllers and each 23017 connects to two 8 channel relay banks.
Power to the Pi is normal 5v DC 1000mA micro-b USB connection. Power the the relay is an external 5v DC 1000mA with a 12v DC input. To make the relays function I needed to connect a ground output from the Pi to the 2nd power source.


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