Name Aryan

1.	Question text:
Design a system using the humidity sensor (https://drive.google.com/file/d/10Z0jvXlMJBG0_FohJ6fIrFQnS-VmN8HF/view?usp=sharing) to detect when relative humidity (RH) in a room goes falls below 30%. When this happens, an exhaust fan needs to be turned on. The device is intended for small controlled-environment chamber. If humidity falls too low it means ventilation is inadequate, and a fan needs to be turned on. The fan is a 230V 50Hz fan. Your device needs to be as small and compact as possible so as to not take up space in the chamber.

2.	Design summary:

	>> I have taken the output of the sensor, passed it to the opamp with +ve of the opamp at 1860 mv. Then I have passed that output to BJT which connects a. c. to the fan. Diagram and detailed explanation is given ahead.
	Your scans are extremely hard to read!


3.	Block diagram
	Very hard to read and not enough detail. What are signal widths, voltage levels, etc?
Where are the interface specifications?
	Why is there a transformer and also a buck converter in your design?
	
4.	Power supply design
	No circuit for power supply?
	You are told that 20 sensors are needed - do you need 20 power supplies?

5.	Industrial Design:
	Why is it made of copper?
	Your diagramming / documentation skills need improvement!

6.	KICAD Design
	Schematic:
	
	Unable to open any Kicad Files.
	PCB:
	
7.	Pricing / BOM / Assembly
	Seems reasonable