Maybe this should be posted in AVR 8-bit forum, but it has to do with electronics too so I posted here.
Will I have any problems opto-isolating a bi directional SPI communication from an AVR MCU to another device? Let's say I'm running the AVR at 1 MHz (internal clock with DIV 8 fuse set) and then setting SPI scale register to scale to fosc/128. I would be using normal transistor output opto isolators (multiple channels obviously) since the SPI would be running in the low KHz range. Would I encounter any problems with this? The device I'm isolating it from must be electrically isolated from the MCU but still have serial communication.