This project aims to help physically challenged people control electrical devices and communicate their basic needs using only head movements. The system uses a MEMS sensor and microcontroller to detect head movements and control relays connected to lights, fans, etc. It also includes a voice chip that can verbally communicate the user's needs. The components and circuit diagrams are described to showcase how the system works.

1. PRESENTED BY: M.RADHA 06681A0431 CHRISTINE D’CRUZE 06681A0410 T.BHASKER 06681A0406 M.KIRANKUMAR 06681A0436

5. 1.Power supply regulator -7805 Hardware & software specifications 2.Resistors -10k,330ohms,100k,330k 3.Transistor- BC547 4. Electromagnetic Relay -12v,7 amp 5.PIC microcontroller-16F72 6. Interfacing voice chip with microcontroller-APR9600 7.MEMS Accelerometer based sensor

6. 8.RF Transmitter & Receiver modules -433Mhz 9.Encoder-HT12E 10.Decoder-HT12D 11.Rectifier-DB107 12.Capacitors-10uf Capacitor-1000uf

7. Block diagram: ADC Micro controller Relay Regulated power supply LED indicators MEMS Micro controller Regulated power supply RF receiver Decoder Encoder RF transmitter Apr 9600 voice circuit

8. RF TRANSMITTER

9. RF RECEIVER

14. MEMS INNER PART

19. Harvard Architecture CPU 8 Memory (Program & Data) CPU 12 14 16 Memory (Data) 8 Memory (Program)