If you are looking for ready AT89 microcontroller projects this is a place to start. Ajay have gathered more than 10 of them. Programs of the projects are written in pure assembly language. Each project have circuit diagram included.
Projects include: Auto Control of three phase Induction motor, Automatic College Bell, Automatic plant Irrigation, Automatic Room light Controller with Visitor Counter, Biomedical Monitoring System, Device Controlling through PC, Digital Visitor Counter, DS1820 Based Temperature Controller, Electronic Voting Machine, Fire Fighting Robot and even more older ones. Binu have more cool related information that may be interesting to read.