Go Down

Topic: MCP23017 keypad hall (Read 425 times) previous topic - next topic

sino93

Apr 29, 2017, 03:32 pm Last Edit: May 01, 2017, 01:15 pm by sino93
Hello!

I am trying to build a matrix keypad with Arduino Uno and a MCP23017 port expander. I got the MCP23017 working with the keypad_mc17 library to this point, even with different i2c addresse :)).

Now i want to use halls sensors instead of pushbuttons and i don't know how to wire them. I have 3144 hall sensors and little knowledge of electronics :)) I tried using different diagrams but none worked.


Datasheets:
http://ww1.microchip.com/downloads/en/DeviceDoc/21952b.pdf
https://www.elecrow.com/download/A3141-2-3-4-Datasheet.pdf

Go Up