Hello to everyone.
I have a working project that uses 6 switches (digital Inputs) to select the state of an rgb led. The inputs use Internal pullUp resistors and the switches put the input to ground. Its working.
Now I need to use another Arduino (arduino 2) to “press the switch” on Arduino 1. Not really press the switch, just put the input to ground I think.
Both Arduinos will be powered by different power sources, wiring Grounds together, Im wondering if my scheme (attached) would work…
When the Output on Arduino 2 is Low, On Arduino 1 I will get the same effect as pressing the switch, but Im not sure if its safe to put that output to 5V and send that to the Arduino 1.
If this works… will also work with a shift register? I need 6 switches.
I will be using standalone arduino, not the board.
Thanks in advance.