On the BeagleBlack the analog signals have to be 1.8 V or less. If a sensor does not have a data sheet specifying output voltages, what do you assume for the output voltage? The maximum output voltage. I want to make sure if I use a voltage divider I do it correctly without ruining my board.
The only “analog out” are the 8 PWMs. The digital output pins, including the PWMs are 3.3V.
Oh, you are asking about the sensors. If you can’t find a data sheet, I recommend not using the device. If you want to use it, grab a DSO Nano from Seed Studio or another scope and test what it puts out under various conditions, including variations on the supply.
Thanks Jason. If I have a temperature sensor though and it outputs a 3 v signal and I have it hooked to into the beaglebone, does that exceed the 1.8v for the a to d convertor on the board? So do I have to put the 3 v signal down to a 1.8 v for the board through a voltage divider?
Great suggestions. Thanks!