how to connect fire alarm of 555IC to microcontroller???? | Microcontroller › 8051 › how to connect fire alarm of 555IC to microcontroller???? This topic has 2 replies, 3 voices, and was last updated 9 years, 6 months ago by SHAH DISHANT H.. Viewing 3 posts - 1 through 3 (of 3 total) Author Posts March 22, 2014 at 7:09 am #2968 mamathaParticipant how to connect fire alarm of 555IC to microcontroller???? March 23, 2014 at 5:23 pm #11359 Ashutosh BhattParticipant what is ur application? describe in detail IC555 output can be directly connected to micro controller to detect as low or high input March 25, 2014 at 9:15 am #11385 SHAH DISHANT H.Participant You can connect output of 555 direct to controller pin. What is the input to 555? and in which mode you have configured it ? Author Posts Viewing 3 posts - 1 through 3 (of 3 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In