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, 08 Jan 2009 22:56:46 -0800 http://backend.userland.com/rss092 HiI have a problem with my stepper motor controller circuit. I used L293D and Atmega16L but there were no signal on L293D output pins although there w <noauthor@nospam.com> http://www.8051projects.net/forum-t939.html I don't know what circuit you are making.. but i send you a small circuit where one DC motor is connected to microcontroller via L293D..L293D is for D Ajay<contact@nospam.com> http://www.8051projects.net/forum-t939.html Thanks. I'm trying to build a obstacle avoiding robot and for controlling motors I've used L293D. I don't know what's wrong with it that does not have Sahar<sahara466@nospam.com> http://www.8051projects.net/forum-t939.html here is the datasheet L293Dand.. yes.. for stepper motor ULN2003 is best. i hope you found relevent material from internet regarding the usage. Ajay<contact@nospam.com> http://www.8051projects.net/forum-t939.html Thanks alot. I know how to find a data sheet in internet I will really be happy if ULN2003 works! Sahar<sahara466@nospam.com> http://www.8051projects.net/forum-t939.html sure.. ULN2003 works perfectly... actually ULN2003 is just to provide sufficient voltage to the stepper motor because microcontroller itself cannot so Ajay<contact@nospam.com> http://www.8051projects.net/forum-t939.html