Posted by Tittu Thomas , 6/23/2012
Now i am with another SIMPLE project, INVERTER. I hope you are already familiar with the term INVERTER. INVERTER is used to convert low Voltage direct current (DC) to high Voltage Alternating Current (AC).
By using an inverter you can generate 230V, 50Hz power supply from a 12V battery.
This circuit may very helpful to you at the time of Power Failure.
ie; you can power any device, commonly works in single phase AC supply at the time of Power cut by using a battery (rechargable battery is recommended).
CIRCUIT DIAGRAM OF SIMPLE INVERTER
COMPONENTS USED IN SIMPLE INVERTER CIRCUIT
IC1 - NE555
Q1 - TIP 41A(NPN)
Q2 - TIP 42A(PNP)
T - Stepup Transformer
R1 - 10KΩ
R2 - 150KΩ
C - 0.1μF
C1 - 0.01μF
C2 - 2700μF
Lets Look How this
SIMPLE INVERTER WORKS
The circuit mainly consisting of a 555 timer IC, an NPN and PNP Transistors and a Stepup Transformer.
The 555 timer IC is powered by a 12V battery.
The timer IC(NE555) is wired as an ASTABLE MULTIVIBRATOR in this circuit. It will generate Alternating non sinusoidal output wave form at the instant we giving supply Voltage(12V). Thus primarily we generated Alternating Voltage from direct Current (Battery).
The output from 555 Timer is given to the base of two transistors, PNP and NPN.
These transistors help the output Voltage to increase its Current for both the positive and negative cycles.
The output from these transistors are again fed to the input(primary) of a Stepup Transformer. This will upconvert the input Voltage to desired level (230V).
The frequency of power supply is determined by Resistors R1, R2 and C, connected with 555 timer IC. You can even change them with your requirement.
For that you can use our 555 Timer Frequency Calculator.
Here i am using 50Hz power supply, so it is enough to use 10K, 150K and 0.1mF for R1, R2 and C respectively.
The output is taken across the secondary winding of Transformer. Be careful the output is 230V power supply it may cause you serious Injuries.
- THE OUTPUT VOLTAGE IS TOO HIGH, SO DON'T TOUCH THE OUTPUT TERMINALS.
- Dont short down any part of this circuit, which will burst out!!!
- It is not suitable for childrens.
Categories:555 Timer, Power Circuits, projects, simple