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Postby adeibiza » Wed Jan 03, 2018 2:28 pm

my pi is rapidly running out of pins (sensors, pimote, relay board and ac dimmer modules) so i was thinking of getting 2 of the paddle breakout kits (currently using a half size breadboard) along with the 32 channel i/0 expansion hat

does this make sense and any pointers of connecting them up ? :)

thx

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Postby Dave » Wed Jan 03, 2018 5:01 pm

It doesn't really make sense to get 2 paddle breakouts as these wont give you more pins, they simply allow easy connection to the GPIO of the Pi, so 1 would do the job :)

If you get the 32 Channel MCP23017 HAT - https://www.modmypi.com/raspberry-pi/io ... ansion-hat - Make sure you check out the GitHub to make sure it'll do what you want it to do - https://github.com/modmypi/MCP23017_HAT - It simply gives you an additional 32 digital inputs/outputs.

As for connecting them up. Simply attached the MCP HAT to the Pi and then I would recommend getting this paddle board and using a ribbon cable to connect to it, so that you dont block access to the MCP HAT pins - https://www.modmypi.com/raspberry-pi/pr ... -assembled

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Postby adeibiza » Wed Jan 03, 2018 5:06 pm

thanks - the reason for 2 paddle boards i guess was i thought i'd connect one paddle to the pi and another to the 32 expansion for easy connections

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Postby Dave » Wed Jan 03, 2018 5:28 pm

adeibiza wrote:thanks - the reason for 2 paddle boards i guess was i thought i'd connect one paddle to the pi and another to the 32 expansion for easy connections


If you want to do something like that then this might be just what you are after - https://www.modmypi.com/raspberry-pi/io ... w-hat-area

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Postby adeibiza » Wed Jan 03, 2018 5:40 pm

i looked at that originally but it talked about "sharing pins" ? surely all my sensors etc would need their own data pin ?

(sorry, new to this pi stuff;) )

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Postby adeibiza » Wed Jan 03, 2018 6:08 pm

i think i've got it

so i use the triple expansion on the pi then add a paddle to one strip and the 32 channel to another of the 3 strips and then add another paddle to that ?

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Postby Dave » Thu Jan 04, 2018 9:03 am

adeibiza wrote:i think i've got it

so i use the triple expansion on the pi then add a paddle to one strip and the 32 channel to another of the 3 strips and then add another paddle to that ?


The paddle wont connect to the 32 channel board, it's specifically designed to connect to the 40pin header of the Pi. The extra input/outputs you get from the 32 channel board are on different pin headers.

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Postby adeibiza » Thu Jan 04, 2018 12:50 pm

gotcha - so does this make sense

pi > triple expansion

triple expansion row 1 > paddle
triple expansion row 2 > 32 channel

thanks for your patience :)

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Postby Dave » Thu Jan 04, 2018 3:25 pm

adeibiza wrote:gotcha - so does this make sense

pi > triple expansion

triple expansion row 1 > paddle
triple expansion row 2 > 32 channel

thanks for your patience :)


Bingo, that looks like a perfectly good working setup :)

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Postby adeibiza » Thu Jan 04, 2018 3:29 pm

fantastic, cheers :)

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