Hi list, i've been pondering about a 4-bit trinary d/a that i need. I wanted to do it myself, but since i want it analog i don't really have the knowledge... So i want the circuit to give voltage in the realms of 0000 = 0.0v 0001 = 0.1v 0002 = 0.2v 0010 = 0.3v etc. if anyone has any ideas, could you please explain the maths behind it aswell??? thanks Karl