Seven segment based alarm clock using 8051 microcontroller (AT89C51) | Microcontroller › 8051 › Seven segment based alarm clock using 8051 microcontroller (AT89C51) This topic has 0 replies, 1 voice, and was last updated 10 years, 12 months ago by David Orr. Viewing 1 post (of 1 total) Author Posts April 25, 2013 at 1:57 am #2332 David OrrParticipant What are the other componets needed for the (AT89C51)? I Can’t seem to figure out what they are. Please help! Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In