This project showcases a simple logic-based Light and Movement Detector built using only analog and digital non-programmable components: the LM741 operational amplifier, 74HCT04 inverter, and 74HC368 tri-state inverter. The circuit is designed to turn ON a LED only when movement is detected in the dark. If there is ambient light, the LED remains OFF, regardless of any motion. This demonstrates how basic logic gates and analog comparators can be combined to perform conditional decision-making without any microcontroller or programmable ICs.
Items Needed:
- LDR Sensor
- Resistor 1.5Kohm
- LM741
- Potentiometer 10KOhm
- 74HCT04
- 74HC368
- HC-SR501
- Resistor 330E
- LED 5MM Blue
- Breadboard
- Wires
Video:
