1. MICRO PROCESSOR BASED SPEED CONTROL OF DC MOTOR 2. station arrival detector 3. Voice frequency recognition system 4. an automatic digital thermostat forit appliance control 5. Automatic life saving dialler 6. digital image processing 7. Obstacles Detector For Military Vehicle Using Ultrasound 8. Color Identifier 9. light fencing 10. SMS based Home Automation 11. electronics warfare 12. DTMF remote control system 13. cell phone jammers 14. small robot with electronic memory 15. Purification of voice signal in wireless communication systems 16. Circuit diagram of an Object counter 17. cordless security system 18. Bluetooth Home Automation 19. heart beat counter n visual display 20. a robot following a white/black line 21. multichannel monitoring system 22. pc control through mobile 23. high power led mood lamp 24. artificial eye

Reference: http://seminarprojects.com/Thread-electronics-projects-for-engineering-students#ixzz1ziQSRwKY