I am new to the Arduino microcontroller (well, microcontrollers in general), and I have a question. I am going to buy an AC4790-200 transceiver, but on digikey it lists one with TTL interface, and one model with RS485 interface. I know that TTL is transistor logic (parallel?), and that the RS485 is serial (I designed a serial to parallel interface last year so I understand how it works) ...
So is the arduino compatible with RS485 and/or TTL? How should I go about choosing which one to use if both work?
Arduino can drive and receive TTL levels directly. Only with the proper external driver/receiver chip would an Arduino be able to send to a RS-485 link.
Keep in mind im a noob. So an external driver/receiver would be used to regulate the voltage? The arduino accepts 5v at its digital input pins right? Is that what ttl is (5v) and is that why RS485 wont work without an interface?
