Cheap 12V to 220V Inverter


Posted on Feb 7, 2014

Even though today`s electrical appliances are increasingly often self-powered, especially the portable ones you carry around when camping or holidaying in summer, you do still sometimes need a source of 230 V AC - and while we`re about it, why not at a frequency close to that of the mains As long as the power required from such a source remains r


Cheap 12V to 220V Inverter
Click here to download the full size of the above Circuit.

elatively low - here we`ve chosen 30 VA - it`s very easy to build an inverter with simple, cheap components that many electronics hobbyists may even already have. Though it is possible to build a more powerful circuit, the complexity caused by the very heavy currents to be handled on the low-voltage side leads to circuits that would be out of place in this summer issue. Let`s not forget, for example, that just to get a meager 1 amp at 230 VAC, the battery primary side would have to handle more than 20 ADC!. The circuit diagram of our project is easy to follow. A classic 555 timer chip, identified as IC1, is configured as an astable multivibrator at a frequency close to 100 Hz, which can be adjusted accurately by means of potentiometer P1. As the mark/space ratio (duty factor) of the 555 output is a long way from being 1:1 (50%), it is used to drive a D-type flip-flop produced using a CMOS type 4013 IC. This produces perfect complementary square-wave signals (i. e. in antiphase) on its Q and Q outputs suitable for driving the output power transistors. As the output current available from the CMOS 4013 is very small, Darlington power transistors are used to arrive at the necessary output current. We have chosen MJ3001s from the now defunct Motorola (only as a semi-conductor manufacturer, of course!) which are cheap and readily available, but any equivalent power Darlington could be used. These drive a 230 V to 2 G— 9 V...




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    PAL/NTSC Video Time/Date Generator
    Frequency/Voltage Converter With Optocoupler Input
    Design on the basis of AT89C2051 intelligent automobile anticollision alarm equipment
    sound level meter circuit
    building rf remote control
    flip flop led flashing circuit
    How To Build A Simple Current Limiting Bench Power Supply
    Basic circuit diagram of a 2.4 GHz radio system-on-chip CC2430
    Over-temperature alarm and cooling circuit
    Inductive switching power supply circuit diagram



    Top