Hi all
I have 8 relays that are controlled via gpio and I want to work with them simultaneously (lets say all on=11111111, some on and some off=11010111).
I dont want to use 8 gpio from my controller to do it (because lake of gpio).
I am looking for a component that I can send to it digital data (i2c spi ect) and it will set the gpio outputs according to the data I sent (in that way I can save 8 gipo and work with 1 i2c output).
for example I will send the component 20 via I2c and it gpio outputs will be 00010100.
how does a component like this is called?
Regards,