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PROJECT DESCRIPTION

Based on the principle of firing angle control of thyristors, one can control the ac power. A display unit displays the full power or any percentage and one can enter the desired percentage to reduce the power to the load.

The firing angle would be automatically adjusted to maintain the load power. The project uses a lamp such that the entered power matches the required one. The above operation is carried out by using a TRIAC in series with the AC load. (Optionally two no’s of SCRs connected in back to back can also be used)

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

The 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. The 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 the 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
Programmable AC Power
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:  What is Programmable power control?
A:  It implies controlling the lamp power by entering the desired percentage of intensity through a numeric keypad.
Q:  Can I place motor instead of lamp?
A:  Yes up to ¼HP, 230V AC motor can be placed.
Q:  How the bulb intensity can be varied?
A:  Bulb intensity can be varied by varying the firing angle of the thyristor to control its triggering.
Q:  Which thyristor is used?
A:  TRIAC is the thyristor used.
READ WHAT OTHERS HAVE SAID
Average Rating
 5/5
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Showing 1 of 1 reviews
rajesh, nzb on 13th May, 2014, 01:32 PM

The project is very interesting. It is really very good experience to me to do this project individually by watching the audio visuals. I got very accurate result also. I hope it is best place to take the engineering projects.

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