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Touch door

A door that opens and closes on a touch, using MOSFETs as switches and no microcontroller at all.

Course
Analog Electronics
When
Sep to Nov 2020
Team
Wail Abdalla
Supervisor
Prof. Neeta Pandey

The problem

A MOSFET can act as a simple analogue switch. This project shows it controlling a real mechanism with nothing but touch.

How it works

  1. 1Two MOSFETs are wired as touch switches, so a light contact is enough, with no button
  2. 2Touching a switch starts the motor in one direction
  3. 3When the door reaches its end, the other switch stops it, ready to move back the other way

Result

A working door that responds to touch alone.

From the report

The door model, closed
The door model, open
Inside: the MOSFET switches and motor

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