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. Thu, 04 Dec 2008 15:52:21 -0800 http://backend.userland.com/rss092 i been given assignment relating to 8051 microcontroller . how ever , i got some problem when interfacing 8051 with a high to low voltage shifter (74H <noauthor@nospam.com> http://www.8051projects.net/forum-t10306.html just connect 5V test signal to 74HC4050 and see if you are getting 3.3V at the o/p.make sure that 74HC4050 is not bi directional so you might have pro Ajay<contact@nospam.com> http://www.8051projects.net/forum-t10306.html