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PROJECT DESCRIPTION

The main goal of this project is to control AC power based on the principle of firing angle control of thyristors. A display unit displays the full power or any percentage that one can enter to reduce thepower to the load.

Firing angle is automatically adjusted to maintain the load power. The project usesalamp such that the entered power matches the required one by its intensity. The above operation is carried out by using a TRIAC in series with the ACload. (Optionallytwo no's of SCRs connected back to back can also be used)

It uses a microcontroller of the 8051 family. Input is given to microcontroller using a keypad and ZVS is given as reference. A 16X2 LCD is used for display purpose.

Power supply consists of a step-down transformer 230/12V, which steps down the voltage to 12V AC. This is converted to DC using a bridge rectifier. Then ripples are removed using a capacitive filter and, it is then regulated to +5V using a voltage regulator 7805, which is required for the operation of microcontroller and other components.

PROJECT HIGHLIGHTS
Easy to use, Self-explanatory kit.
All-inclusive solution kit.
Extensive audio-visuals available.
Branding-free material.
Pre-programmed Microcontroller.
Load Switch @ Zero Voltage.
Call/mail for Tech Support from 10 am - 7 pm.
Can be Customized for Arduino, Raspberry Pi, PIC
BLOCK DIAGRAM
Controlling AC Power by Programming-Project Kit
Hardware Requirements
  • Microcontroller (AT89C52/S52)
  • TRIAC
  • LCD
  • Transformer
  • Regulator
  • Capacitors
  • Resistors
  • Diodes
  • Keypad
  • Opto Isolator
  • Lamp.
Software Requirements
  • Kiel compiler
  • Languages: Embedded C Or Assembly
Q & A
Q:  Which microcontroller is used in this project?
A:  The microcontroller used in this project is a 40 pin IC from 8051 family.
Q:  Why TRIAC is preferred instead of relays?
A:  TRIAC is a solid state device compared to a relay which is a electromagnetic device with contact pitting problem
Q:  Which thyristor is used?
A:  TRIAC BT136 is used as the thyristor.
Q:  What is Programmable power control?
A:  It implies controlling the lamp power by entering the desired percentage of intensity through a numeric keypad.
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