This is a simple DC to AC inverter circuit project to convert a 12V DC battery become 230V AC. By doing simple modification you can also convert 6V DC to 230V AC or 110V AC. It can be used to power up the electronic devices which require low electrical consumption. For example for home needs to enable light loads (electric bulb, CFL, etc) at the time of electricity failure, smartphone charger, etc.
DC to AC Inverter Component List
- IC CD4047
- Resistors (1K, 18K, 100Ω- 0.5W x 2)
- Capacitor (0.22µF)
- 12V rechargeable battery
- IRFZ44 MOSFET x 2
- Step Down Transformer (230V primary 12V-0-12V, 5A secondary) (110V to 12V-0-12V, 5A can also be used) NB:- Transformer connection inverted
How the DC to AC Inverter Works
- The inverter circuit is built around IC CD4047 which is wired as astable multivibrator.
- The operating frequency of astable multivibrator is set to 50Hz.
- The power MOSFETs IRFZ44 are directly driven by the Q and Q’ output of CD4047.
- The power MOSFETs are connected in Push Pull configuration (Power amplifier). The MOSFETs will switch according to the pulse from CD4047 astable multivibrator.
- Thus an AC voltage is transferred to the primary of transformer; it is stepped up to 230V.
DC to AC Inverter Notes
- The transformer used here is an ordinary step down transformer which is connected in inverted manner. That is, the primary of a 230V to 12V-0-12V step down transformer can be treated as secondary for this inverter project.
- If you would like to get 110V AC, choose 110V to 12V-0-12V step down transformer in reversed way. (That is primary as secondary and secondary as primary)
- The inverter output is filtered by capacitor C2.
- Use suitable heat sinks for MOSFETs.