Hello,
I am looking now a couple of days around for a solution to use optocouplers to step down the analog input sensor signals with approx. 0-12v (up to 15V) to use it with the analog input of a Teensy 3.5.
The Teensy has 3.3v analog inputs. I know I could use simply a voltage divider but I like the idea to secure the inputs with optocouplers.
My actual problem is to choose the right type and model of couplers.
Also from my understanding, the optocouplers specs are more pointed to the current and lineality then to the voltage. I have seen as well couplers with logic outputs but I am not sure what kind of output signal this is?! Is here logic meant like just high/low or do exist optocouplers with digital outputs like getting 0-1023 through I2C bus or something like that?
Until now I used simply voltage dividers but I had the situation where a too high voltage have blown up the analog inputs.
A bit more about what I want to build:
Translate analog signals from the older engine of my yacht / boat to a CAN bus like NMEA2000 network to be used on my multifunction display and to use some signals for my DIY autopilot. Hardware is like mentioned a Teensy 3.5 and Teensy 3.2.
Thank you for any ideas!
I am looking now a couple of days around for a solution to use optocouplers to step down the analog input sensor signals with approx. 0-12v (up to 15V) to use it with the analog input of a Teensy 3.5.
The Teensy has 3.3v analog inputs. I know I could use simply a voltage divider but I like the idea to secure the inputs with optocouplers.
My actual problem is to choose the right type and model of couplers.
Also from my understanding, the optocouplers specs are more pointed to the current and lineality then to the voltage. I have seen as well couplers with logic outputs but I am not sure what kind of output signal this is?! Is here logic meant like just high/low or do exist optocouplers with digital outputs like getting 0-1023 through I2C bus or something like that?
Until now I used simply voltage dividers but I had the situation where a too high voltage have blown up the analog inputs.
A bit more about what I want to build:
Translate analog signals from the older engine of my yacht / boat to a CAN bus like NMEA2000 network to be used on my multifunction display and to use some signals for my DIY autopilot. Hardware is like mentioned a Teensy 3.5 and Teensy 3.2.
Thank you for any ideas!