34 lines
1.4 KiB
Plaintext
34 lines
1.4 KiB
Plaintext
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Name Aryan
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1. Question text:
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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.
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2. Design summary:
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>> 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.
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Your scans are extremely hard to read!
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3. Block diagram
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Very hard to read and not enough detail. What are signal widths, voltage levels, etc?
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Where are the interface specifications?
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Why is there a transformer and also a buck converter in your design?
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4. Power supply design
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No circuit for power supply?
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You are told that 20 sensors are needed - do you need 20 power supplies?
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5. Industrial Design:
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Why is it made of copper?
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Your diagramming / documentation skills need improvement!
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6. KICAD Design
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Schematic:
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Unable to open any Kicad Files.
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PCB:
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7. Pricing / BOM / Assembly
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Seems reasonable
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