Shivam

Shivam/Comments.txt

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+Name Shivam
+
+1.	Question text:
+Design a system using a conductive water sensor (basically two metal probes that are very close together - when water is present between the probes it conducts) to detect when water level in a tank falls below 20% and when that happens, turn on a pump. The pump is a 3-phase 3-wire 1kW rated. This is for an industrial application where the water is being used for a chemical process. Design the system with some fail-safe such that the tank should never become empty.
+
+
+2.	Design summary:
+	Good approach. For reliability it is ok to say good quality components but beyond that how doyou ensure fail safe?
+	e.g. one way is to have redundancy - multiple sensors; bakckup alerts, etc.
+	for example, what if the relay fails? Or the motor is powered but the pump is blocked etc?
+	You need to close the loop from the circuit instructing the motor to be on but pump not working somehow.
+	What about over-rides? What if your box fails - is it possible to manually enable/disable the motor if needed?
+
+3.	Block diagram
+	your block diagram is a muddle of electrical, signal and mechanical items. Think a little about how to make a readable and clear diagram
+	
+4.	Power supply design
+	Looks like your voltage level diagrams have some mistake. when tank is 100% full, all ABC lines should be ~12V.
+	Why are you realising gates through transistors? Can't you just use 74LSxx series chips?
+
+5.	Industrial Design:
+	Could have been more detailed - with mechanical details, specific material etc.s
+
+6.	KICAD Design
+	Schematic:
+	
+	PCB:
+	
+7.	Pricing / Assembly