Hi,
I am trying to use an antique rheostat to send a 0-3.3V signal to an AdaFruit Metro M0 Express. The signal will be used to control the lights in my bedroom, specifically the brightness. The 0-3.3V will corollate to 0-100% brightness which will be transmitted to my lights through WiFi. I have attached a schematic and picture of the Rheostat. The blue lines are internal to the rheostat and the black line are wiring that I will be using to connect the rheostat to the Metro. The resistors are shown at 100 Ohms but I can swap them out if necessary. The rheostat is basically a series of resistors with contacts between them - you turn the knob on top to connect to the contacts. Per my schematic there are 4 points/wires that I need to connect to the Metro (A through D). I have attached the pinout for the Metro. My questions are: Is what I am planning to do doable? If so, how do I connect the points (A through D) to the Metro to get the 0-3.3V signal?
I am trying to use an antique rheostat to send a 0-3.3V signal to an AdaFruit Metro M0 Express. The signal will be used to control the lights in my bedroom, specifically the brightness. The 0-3.3V will corollate to 0-100% brightness which will be transmitted to my lights through WiFi. I have attached a schematic and picture of the Rheostat. The blue lines are internal to the rheostat and the black line are wiring that I will be using to connect the rheostat to the Metro. The resistors are shown at 100 Ohms but I can swap them out if necessary. The rheostat is basically a series of resistors with contacts between them - you turn the knob on top to connect to the contacts. Per my schematic there are 4 points/wires that I need to connect to the Metro (A through D). I have attached the pinout for the Metro. My questions are: Is what I am planning to do doable? If so, how do I connect the points (A through D) to the Metro to get the 0-3.3V signal?