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🟦 IRLZ44N MOSFET - Function: Acts as a switch to disconnect the load when overcurrent is detected. - Pins: Gate (G), Drain (D), Source (S) - Package: TO-220, with a metal tab for heat dissipation 🟫 0.1Ω Shunt Resistor - Function: Measures current by producing a small voltage drop proportional to current flow. - Type: Wirewound or metal strip, rated for 2W or higher - Placement: In series with the load, typically on the low side 🔄 10kΩ Potentiometer - Function: Sets the reference voltage for the comparator to define the trip threshold. - Type: Rotary or trimmer style - Connection: Forms part of a voltage divider network 🔺 LM393 Comparator - Function: Compares the shunt voltage to the reference and triggers the MOSFET cutoff. - Pins: Dual comparator channels, open-collector output - Use: Drives the MOSFET gate based on current sensing --- 🧠 Tip for Presentation Encourage her to label each component in her schematic and explain its role using analogies: - MOSFET = gatekeeper - Shunt = current sensor - Potentiometer = sensitivity dial - Comparator = decision-maker 🧠 Teaching Tip Let her explain each part using analogies: - MOSFET = gatekeeper - Shunt = current sensor - Potentiometer = sensitivity dial - Comparator = decision-maker
