Practical case: Open door alarm with inhibition
Level: Basic – Design a logic circuit using a 74HC00 NAND gate to trigger an LED alarm only when the door is open and the system is enabled.
Basic, Digital Electronics, NAND gate, NAND gate_Basic
Basic
Practical case: Emergency stop system
Level: Basic – Use the low-level output of a NAND gate to stop a process if two sensors detect danger simultaneously.
Practical case: Logic inverter using NAND gate
Level: Basic – Demonstrate the universality of the NAND gate by configuring it as a basic NOT gate.
Practical case: Dual Input Alarm System using OR Gate
Level: Basic – Build an alert system that activates a warning LED when either a local or remote signal is triggered.
Practical case: Nurse call bell
Level: Basic – Implement an OR gate to activate an alert from two independent switches.
Practical case: astable oscillator with NE555
Level: Basic — Build an NE555 astable timer that blinks an LED at a visible frequency.