Practical case: Nurse call bell
Level: Basic – Implement an OR gate to activate an alert from two independent switches.
Basic, Digital Electronics, OR Gate, OR gate_Basic
Digital Electronics
Practical case: 0-9 counter with TTL-compatible reset
Level: Medium — Build a decimal counter that advances from 0 to 9 and resets automatically using a TTL-compatible AND gate.
Practical case: astable oscillator with NE555
Level: Basic — Build an NE555 astable timer that blinks an LED at a visible frequency.
Practical case: Conveyor belt object counter
Level: Medium – Build an optical object counter with decimal outputs and an automatic batch reset.
Practical case: One-Shot Timer Using NE555
Level: Basic – Build a monostable timer circuit using the NE555 IC to control an LED output for a set duration.
Practical case: Standby mode indicator
Level: Basic – Understand logical inversion using a NOT gate to activate a standby LED when the main system turns off.