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Introduction to Auto bots

Introduction to Auto bots. Today we will cover: Voltage regulators Sensors motordrivers. Voltage Regulators. Voltage regulators are used to step down DC voltages Output voltage is fixed and the input may fluctuate, 2 kinds of voltage regulators: Dessipative type

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Introduction to Auto bots

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  1. Introduction to Auto bots • Today we will cover: • Voltage regulators • Sensors • motordrivers iBOT

  2. Voltage Regulators • Voltage regulators are used to step down DC voltages • Output voltage is fixed and the input may fluctuate, • 2 kinds of voltage regulators: • Dessipative type • Switch mode power supply iBOT

  3. Dessipative type • Nomenclature ( 78xx) • Pin Configuration • When and when not to use? iBOT

  4. SMPS • Used in computers • Desired voltage is achieved by switching on and off the power supply and passing the output across a capacitor. iBOT

  5. Review of Electronic components • Potential divider/ Rheostat • LEDs and Photodiodes • Comparators iBOT

  6. Making a contrast sensor • Contrast sensor can differentiate between black and white. • To make a contrast sensor we need: • LED and photodiode ( IR spectrum)‏ • Comparator ( to digitize the output) • Potential divider ( to calibrate it )‏ iBOT

  7. Schematic iBOT

  8. Other types of sensors • TSOP/ obstacle detection sensors • Sound Sensors • Bump Sensors • Tilt sensors iBOT

  9. Transistors/ Mosfets • Electronic switches • Signals can be used to connect and disconnectPower circuits • Used as signal amplifiers for running power circuit components such as motors, actuators. iBOT

  10. Motor Drivers • Commonly used motor driver: L293D, mc33886 • Uses mosfets to electronically switch circuit. • Middleman between microcontroller and motors. iBOT

  11. Working of a Motordriver • H bridge iBOT

  12. L293D • 16 pin IC • Can control 2 motors, bidirection • Supports PWM iBOT

  13. Contact Us • Ashwin Ram ( Mujra) -9840355551 • Abhishek (Blade) -9940317883 • Abhishek (Twister) -9884441901 iBOT

  14. Next session • Intro to Microcontrollers • Softwares required • Make your own line follower! iBOT

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