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1155a7f801
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Design Summary (add text in the box below or upload a PDF)
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Explain how you approach this design problem.
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Include your assumptions, trade-offs, with any and all design choices you make.
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Upload the block diagram of the system you have designed as a single PDF.
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Hand drawn diagram is acceptable - just make sure it is neat and clearly labelled. Mark all interfaces. Make sure to include suitable power supply/supplies.
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Power Supply Summary (add text in the box below or upload a PDF. Handwritten+scanned is acceptable as long as it is neat and legible.)
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* Explain your choice of your power supply. * Explain how your power supply works. Include circuit diagrams, waveforms and graphs as needed.
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Design Summary (add text in the box below or upload a PDF)
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Explain how you approach this design problem.
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Include your assumptions, trade-offs, with any and all design choices you make.
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Upload the block diagram of the system you have designed as a single PDF.
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Hand drawn diagram is acceptable - just make sure it is neat and clearly labelled. Mark all interfaces. Make sure to include suitable power supply/supplies.
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Power Supply Summary (add text in the box below or upload a PDF. Handwritten+scanned is acceptable as long as it is neat and legible.)
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* Explain your choice of your power supply. * Explain how your power supply works. Include circuit diagrams, waveforms and graphs as needed.
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Industrial Design Summary (add text in the box below or upload a PDF. Handwritten+scanned is acceptable as long as it is neat and legible.)
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* Show (with labelled and dimensioned sketches) how your product will look (in the final form) as delivered to the end user. Include the enclosure, mounting etc as necessary.
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* Explain in a few words what the enclosure is made of.
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Complete your entire design in Kicad, including:
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* Circuit / schematic design:
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* Make sure to assign the appropriate values / ratings for each component. When you select components make sure they exist on a commercial electronic platform (e.g. some are listed here: https://gitea.iitdh.ac.in/PEG/PEG-Wiki/wiki/PurchasingComponents)
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* Assign appropriate footprints to each component
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* Make sure to run the Electrical Rule Checker before moving to the layout.
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* PCB Layout design
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When you are done, export the design as a SINGLE ZIP FILE (File > Archive) and then upload the zip file here.
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Upload the Bill of materials (BOM) spreadsheet as a single XLS file. The spreadsheet should contain the following columns, at a minimum:
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* Reference designation * Part number * Value / Ratings
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@ -23,12 +23,7 @@ Design a system using a conductive water sensor (basically two metal probes that
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6. KICAD Design
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Schematic:
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Looks good
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PCB:
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No PCB Found. I've deducted some points for that but other responses are all ok.
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7. Pricing / BOM / Assembly
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Why do you need 400V transistors?
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Where are remaining components in the BOM + pricing? Connectors, pcb, etc...?
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7. Pricing / Assembly
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Name: Swakath
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1. Question text:
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Design a system using this Honeywell ammonia sensor (https://drive.google.com/file/d/164WvPD7GauvseOfH-K3v8iZ4YYmQFkq-/view?usp=sharing ) to detect when ammonia concentration in ambient atmosphere exceeds 100 ppm an alert an operator in a control room about 100m away. This device will be mounted in various sections of an industrial processing plant. The complete plant will need a fairly large number (~20) of sensors so unit costs needs to be kept under control. Also, once mounted it will be very difficult to remove/service/repair the sensing devices.
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2. Design summary:
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Overall approach is fine.
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Good work finding th module that has a 4-20mA output directly
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3. Block diagram
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Why is there a common supply for both the sensor module and the receiver module?
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They might be physically very far apart!
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4. Power supply design
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The brick module may end up being underpowered for what you need.
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Also, why design a rectifier filter and then use the module?
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Power in a current-driven system is indeed tricky - you need to factor in the worst case
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voltage drop and times the current is power.
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5. Industrial Design:
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6. KICAD Design
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Schematic:
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All good - good use of decoupling caps.
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No Power on LED?
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How exactly is the fault opamp working?
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Also the OpAmp outputs are +/-12V. If you're connecting this to the uC you need to scale down to 5V or 3v3.
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PCB:
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No Mounting holes?
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Good use of pours
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7. Pricing / BOM / Assembly
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The question asked for 2 prototypes - meaning two systems with about 20 sensor modules each.
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But I guess this interpretation is fine too.
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