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, 20 Nov 2008 19:43:40 -0800 http://backend.userland.com/rss092 hiii all,i need to make interfacing bet. mobilephone (nokia 6100) and MCU ,so i try 1st to connect the mobile with hybridterminal but it not work at a <noauthor@nospam.com> http://www.8051projects.net/forum-t9410.html Hi Ahmed,I have the same problem with my project and I need help too the phone is nokia 6100 and I have tried many commercial cables (serial ones) wit Eng_Z<az_20002@nospam.com> http://www.8051projects.net/forum-t9410.html hi Ajay Do you have any experience with that ?and if you have (I hope you have) Does the above circuit work with AT-commands?Waiting your reply,, Eng_Z<az_20002@nospam.com> http://www.8051projects.net/forum-t9410.html you can directly connect your controller RX and TX with phone as both are going to be on TTL levels. so only three pins of 6100's port tx, rx, and GND Ajay<contact@nospam.com> http://www.8051projects.net/forum-t9410.html hi Ajay,Thank you for your reply, I will try that soon and I will tell you the resultsbut what if we make a voltage divider at the RX of the phone to Eng_Z<az_20002@nospam.com> http://www.8051projects.net/forum-t9410.html well just limit the current using resistor and surely a voltage divider is needed. phone is more important Ajay<contact@nospam.com> http://www.8051projects.net/forum-t9410.html Ajay wrote ...well just limit the current using resistor and surely a voltage divider is needed. phone is more important Does limiting the current wi say2paul<say2paul@nospam.com> http://www.8051projects.net/forum-t9410.html it means voltage drop...voltage divider is when you divide voltage using two resistors..|   V1 |   V2 ||/\ Ajay<contact@nospam.com> http://www.8051projects.net/forum-t9410.html