555 timer IC Inverter circuit schematic 12V to 220V

This article explains What is inverter? And how can you construct your own simple low cost 12V to 220V inverter circuit. An inverter is nothing but a DC to AC converter. Inverters are very useful electronics products for compensating emergency power failure, as it performs DC to AC conversion.

AC can’t be stored for future use but DC can be stored for future use in a battery. The stored DC can be converted back to AC by using power inverters.
Here is the simple inverter circuit diagram using 555 timer IC. The astable multivibrator mode operation of 555 timer utilized here for AC oscillations and these oscillations are switched via transistor 2SC4029 to a transformer. The transformer step ups the voltage to 220V AC. Use a 12V battery and Battery charger circuit for this project. Design of inverter circuit is also given.

Circuit diagram of DC to AC inverter

555+timer+IC+based+12V+to+220V+Inverter+circuit+schematic+circuit+diagram 555 timer IC Inverter circuit schematic 12V to 220V

Components required

  1. Power supply (12V)
  2. Resistors (3kΩ x 2; 1kΩ, 2W x 1)
  3. Capacitor (10µF)
  4. 555 timer IC
  5. Diode(1N4007)
  6. Transistor (2SC4029)
  7. 9V to 220V Step up transformer

Working of DC to AC inverter

  • This is a simple inverter circuit based on 555 timer IC. Here timer IC wired as an astable multivibrator mode.
  • The diode 1N4007 is used to get 50% duty cycle for the pulses from 555, it also reduces the design complexity.
  • The output pulse from the 555 astable multivibrator is fed to the base of power transistor 2N5192. The 2N5192 transistor works as a switch, so the 12V DC supply passed through the transformer at a rate of 50 times per second.
  • Transformer step up the 12V to 220V, thus we got 50Hz, 220VAC supply at the output of transformer secondary.

Design of Inverter circuit

555 timer Astable designed about to oscillate at 50Hz, line frequency.
Frequency of astable multivibrator is given by,

555+timer+IC+based+12V+to+220V+Inverter+circuit+schematic+circuit+diagram+design 555 timer IC Inverter circuit schematic 12V to 220V

Choose C=10µF, then

555+timer+IC+based+12V+to+220V+Inverter+circuit+schematic+circuit+diagram+design+2 555 timer IC Inverter circuit schematic 12V to 220V

Use R1=R=3kΩ

Related circuits

Pinout of transistor and 555 timer IC

44 thoughts on “555 timer IC Inverter circuit schematic 12V to 220V

  1. output power? 5w, 10w 75w, 100w…? what kind of stuff can i plug into this inverter? what about computer charger (70w) so that i can use laptop in car? thanks

  2. hi, can we replace transistor 2sc4029 with n-channel mosfet like irf830b or irf3205 this way: base=gate, collector=drain, emitter=source? thanks

    • Hi Kevinjohn,
      Yes it is a step up transformer. Positive is connected to 12V Vcc to collector of transistor. Transistor is switched by astable, so output will be AC.

  3. If a pure sine wave is fed into the base of the transformer instead of a square wave, will the output be a pure sine wave?

    • Hi Akin Olufemi,
      As we know a transistor can work as both an Amplifier and as a Switch. Square wave used while dealing with transistor switch (common in Digital electronics) where as Sine wave need proper biasing and Q point for amplification. Amplifier will give pure sine wave.

  4. I had 3.3 volts output in my circuit. I want to convert it to AC . What changes do I need to do in the above mentioned circuit ?

  5. Can you please tell me if I can use a centre-tap transformer in this circuit? If so, where will by centre-tap pin be connected? My inverter is not showing any output without the transformer :(
    Please answer my questions soon, I need it badly. Thanks

    • Hi Michael
      Here in the circuit relay cannot be used instead of transistor as relay cannot be used for faster switching.

  6. timing of time inveter work for 7.5AH ,12v battery with f bulb(40w) or tv?
    can you give the for how long (hour) the inverter work ?
    40w bulb and tv

  7. if i use 555 as an oscillator and then fed this into tip122 and tip125 NPN and PNP combination will it work??
    secondly after this combination in order to increase power i use 2n3055 and output current of tip combination is fed into 2n3055 is that ok??

    help me out plzz

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