8051 Microcontroller Projects AVR PIC Projects Tutorials Ebooks Libraries codes : Forum / topic http://www.8051projects.net/ Learn to make simple microcontroller projects, pic, 8051, avr and arm projects. download 8051 projects, tutorials, libraries, sample codes. join the microcontroller discussion forum and ask doubts regarding electronics. the best source for 8051 over internet. en-gb 2009-01-07T22:43:31-08:00 contact@nospam.com hourly 1 2000-01-01T12:00+00:00 hardware circuit for 8 relay interface card http://www.8051projects.net/forum-t6124.html 2009-01-07T22:43:31-08:00 I am doing a project on controlling 8 relays from Microcontroller.I have done all the coding for Controlling relays.I need hardware Circuitary Between the relays and Microcontroller, something like the board from onlinetps.com. here is the link for that board.http://www.onlinetps.com/ViewItam.php?ItemID=193.Can any one tell me which IC's has been used in that board? or what is hardware Circuitary in that board?Thank you.....vmax. Re: hardware circuit for 8 relay interface card http://www.8051projects.net/forum-t6124.html 2009-01-07T22:43:31-08:00 sashijoseph Must be ULN2803-octal darlington array..