when alarm is activated i get a 24v
i did think of opto-isolator, but i still have to drop the voltage down on tee input, max v in on a 4n25 is 6v,
you mean 2.4k, 2.7k?
hi mike what is the absolute maximum voltage of a 4n25? im a bit confused, if thats the case that there is no max voltage on the input side then i dont need to drop the voltage (24v) just limit the current to the led?would this be okthank you