Movement Detector Light Using OP-AMP
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This document describes a movement detector light circuit using an op-amp. It contains the objective, concept, required equipment, circuit diagram, applications, and limitations. The circuit uses a light dependent resistor, op-amp, resistors, and variable resistor connected to an LED. When movement is detected, the voltage input to the non-inverting point of the op-amp changes, causing the LED to illuminate. Potential applications include security systems, museum displays, and home lighting. The main limitations are that it only works in low-light conditions and the operating temperature range of the LM324 op-amp.
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Movement Detector Light Using OP-AMP
- 1. GREEN UNIVERSITY OF BANGLADESH Department: EEE (Eve) Prepared For: Nusrat Alim Lecturer, GUB Prepared By: Md. Sahed Dewan ID# 143010021 Course Title: Electronics II
- 2. Movement Detector Ligh Using Op-Amp
- 3. Objective: Introduction Concept Equipments Circuit diagram Application Limitation
- 4. Introduction Op-amp based movement detecting light has a great influence on the security system. In order to improve and make security more tight, this device which is made on the principle of voltage comparator is more reliable.
- 5. Concept The voltage on the inverting input is kept fixed by using the variable resistor. The voltage input in the non-inverting point is the voltage which is to compare with the inverting point. While the voltage on inverting point is less than the non-inverting point, then the op-amp pass signal voltage through it.
- 6. Equipments LDR Op-Amp (LM324) Resistors (39K, 10K-2) Variable Resistor (100K) LED
- 7. # IC LM324 Fig: Structure Of IC LM324
- 8. Circuit diagram 100 k 1 3 2 4 11 LM324 39K 100K LDR LED100K
- 9. It can be used to control the entrance in different important places. It can be used to secure peoples’ residence from unwanted entry. It can be used for protecting the valuable antiques and things kept in the museum. Using a buzzer in place of the LED, it can also be used as security alarm. It can also be used for attractive lighting decoration in many occasion. Application
- 10. It works only in absence of sunlight. The temperature has an effect on the IC LM324. It works well between 16-85 degree centigrade. Limitation