"Industrial Load Management System Using MQTT Protocol for Real-Time Energy Optimization ", Thesis of Industrial management

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} 12.4 Dimmer module Dimmer module has no Moving parts but instend uses the electrical and optical Properties of solid state semiconductors to perform its switching functions. The dimmer module as per its name is used to dim the brightness of the bulb in this project Dimmer Input One of the main components of a Dimmer module is an opto-isolator (also Hed an opto-coupler) which contains one or more infra-red lightemitting diode, or LED light source, and a photo sensitive device within a single case. Dimmer Circuit The most common application of dimmer module is in the switching of an AC Joad, whether that is to control the AC power for ON/OFF switching, light dimming, motor speed control or other such applications where power control is necded, these AC loads can be easily controlled with a low current DC voltage using a dimmer Moc 3020 + Optoisolator MT2 To Micro- A 120V 2us controller : Mrs BTACG 6008 MOC 3020 randam switching MOC 304" zero-swiching Fig. 3.12 Dimmer Cireuit 23 This type of opto-coupler configuration forms the basis of a dimmer module application which can be used to control any AC mains powered load such as ‘amps and motors, Here we have used the MOC 3020 which is a random switching isolator. The MOC 3041 opto-triac isolator has the same characteristics but with built-in zero- crossing detection allowing the load to receive full power without the heavy inrush “currents when switching inductive loads.Diode Dy prevents damage due to reverse connection of the input voltage, while the 56 ohm resistor (R3) shunts any di/dt _ currents when the triac is OFF eliminating false triggering. It also ties the gate terminal to MTI ensuring the triac tums-off fully.f used with a pulse width modulated, PWM input signal, the ON/OFF switching frequency should be set to less “than 1OHz maximum for an AC load otherwise the output switching of this dimmer “circuit may not be able to keep up. } Features We are going to deal with 8 BIT Dimmer Module due to its 8 BIT Data communication and high reliability which is shown in Fig. 3.13. PIN1 - GND PIN2 - VCC 5 VOLTS PIN3- PINS - 8 BIT DATA PINIO- 1X PIN 11-RX J2- NOTUSED Fig. 3.13 Dimmer Module 24