Heartbeats Pulse Sensor

My mini quadcopter 250mm

Ready to fly and remp-it

Variable power supply with digital control

Basic OP-Amp circuit

AC and DC Volts test

Inverter - DC to AC converter

2km FM transmitter

DC Motor speed control using PWM technique

http://www.electronicsforu.com/electronicsforu/circuitarchives/view_article.asp?sno=207&article_type=1&id=382&tt=unhot&b_type=new#.U99mh9QayK0

transmission line inspection robot

http://electronicsforu.com/electronicsforu/circuitarchives/view_article.asp?sno=1845#.U8z9H7H59rs&title%20=%20Meet+Transmission+Line+Inspection+Robot&id=13095&article_type=5&b_type=new

Cellphone operated landrover

https://m.facebook.com/story.php?story_fbid=880008845356267&substory_index=0&id=177778408912651

Servo auto spray

http://arduinoarts.com/2014/07/tutorial-servo-auto-spray/

Solar-energy syetem

http://electronicsforu.com/electronicsforu/circuitarchives/view_article.asp?sno=1728#.U5FLjyjA16A&title%20=%20Solar%2DEnergy+Systems&id=13016&article_type=8&b_type=new

DIY automated line following robot

https://m.facebook.com/story.php?story_fbid=878620485495103&substory_index=0&id=177778408912651

Water level controller cum motor protector

https://m.facebook.com/story.php?story_fbid=878377385519413&substory_index=0&id=177778408912651

Design a low power product using MSP430 microcontroller

https://m.facebook.com/story.php?story_fbid=878166852207133&substory_index=0&id=177778408912651

Make a microcontroller-based ring tone player

https://m.facebook.com/story.php?story_fbid=877939465563205&substory_index=0&id=177778408912651

Microcontroller-based DC motor control

https://m.facebook.com/story.php?story_fbid=877473048943180&substory_index=0&id=177778408912651

Put coin and draw power

https://m.facebook.com/story.php?story_fbid=877259122297906&substory_index=0&id=177778408912651

RPM counter using microcontroller

https://m.facebook.com/story.php?story_fbid=876894119001073&substory_index=0&id=177778408912651

Phase angle control of SCR

https://m.facebook.com/story.php?story_fbid=875952545761897&substory_index=0&id=177778408912651