500W Inverter 12V → 220V (2N3055 + CD4047)

This 500W inverter circuit converts 12V DC from a battery into 220V AC mains voltage. It uses the CD4047 IC as a stable astable oscillator to generate a square wave signal at 50Hz, which drives a pair of 2N3055 power transistors in a push-pull configuration. These transistors amplify the signal to drive a step-up transformer, producing 220V AC output suitable for small appliances or LED lamps.

Key Features:

• Input Voltage: 12V DC (car battery or solar battery)
• Output Voltage: 220V AC
• Power: 500W max (depending on transformer and transistor heat dissipation)
• Core Components: CD4047 oscillator, 2N3055 transistors, step-up transformer
  
  

  Tip: Ensure proper heat sinks for the 2N3055 transistors, and avoid running at full load for long periods. Square wave output is suitable for resistive loads but may not work properly with sensitive electronics.