I'm looking for a bit of help with a wee project I have.
I'm trying to control 4 inputs on a Digital Input Module from my Arduino Uno
The DIM is here: http://www.titanproducts.com/categories/5_198_62/Digital_Input_Multiplexer__DIM4_.html
pdf datasheet here: http://www.titanproducts.com/download/datasheets/62.pdf
From the pdf, the unit in question is the one to the left and as you can see it mentions Volt free inputs of which there are 4 and it is these 4 that I wish to connect to my Arduino Uno output pins.
Although the sheet says “volt free”, I am measuring them at 5v.
At the moment, I'm looking at two solutions.
1) Make a shield with 4 5v relays onboard and connect this way. (or buy???) (completely isolating the voltfree/5v)
2) Take the ground from the Arduino and connect it to the ground of this DIM, then using the 5v from the Arduino output pins, connect one to the negative side of each of the 4 inputs on the DIM
All help and comments are appreciated...
Thanks in advance.