Capacitor C5 and potentiometer R12 determine the frequency of the output signal at pin 3 of IC1, the 555 oscillator. The output signal is differentiated by C3 and C4 before it`s input to the base of power transistors Q1 and Q2 via diodes D1 and D2, respectively. The signal from !C1 is adjusted to 120Hz, because the flip-flop formed by transistors Q3 and Q4.divides the frequency by 2.
60Hz-power-inverter - schematic

When Q3 is on, the base of Q1 is connected via R1 to the regulated 12-V supply. Then, when the flipflop changes states, Q4 is turned on and the base of Q2 connected to the 12-V supply through R2. The 100 mA base current allowsQ1 and Q2 to alternately conduct through their respective halves to the transformer`s secondary winding. To eliminate switching transients caused by the rapid switching of Q3 and Q4, capacitors C1 and C2 filter the inputs to the base of Q1 and Q2 respectively. Power for the unit comes from an automobile`s 12V system or from a storage battery. The power is regulated by IC2, a 7812 regulator. LED1, connected across the 12-V input, can be used to indicate whether power is being fed to the circuit. The neon pilot lamp, LMP1, shows a presence or absence of output power.

Recommended videos

  • Make an inverter : DIY Experiments [#2] Power AC devices with a battery / Simple inverter DIY
    Duration: 6:26.
  • AC Circuits, Transformerless Power Supplies,
  • Homemade Modified Sine Wave Power Inverter(350/500w)
    Duration: 7:37.


  • DailyQuint
    Cornerstone Capital Management Holdings LLC. decreased its stake in shares of Cree, Inc. (NASDAQ:CREE) by 1.1% during the third quarter, according to its ...
     18 February 2017
  • DailyQuint
    Community Financial News Cree, Inc. (NASDAQ:CREE) had its price target raised by Williams Capital from $23.00 to $24.00 in a research note released on Wednesday. They currently ...Cree, Inc. (CREE) Receives “Hold” Rating from
     17 February 2017
  • Market Exclusive
    The current consensus rating on Cree (NASDAQ:CREE) is Hold (Score: 2.12) with a consensus target price of $32.54 per share, a potential 24.15% upside.Brokers Issue New Targets On Cree, Inc. (NASDAQ:CREE) - Fiscal ...Fiscal Standard
     17 February 2017
  • Yahoo Finance
    Cree, Inc. (CREE), a market leader in LED lighting, today announced that it will terminate the definitive agreement to sell its Wolfspeed Power and RF division (“Wolfspeed”), which includes the silicon carbide substrate business for
     16 February 2017
  • New Electronics
    With dynamic losses said to be an order of magnitude lower than 1200V silicon IGBTs, the parts are initially suitable for applications such as photovoltaic and uninterruptible , but the company says it will extend the range to
     15 February 2017
  • MassTransitMag.com (press release) (registration) (blog)
    To operate rail lighting, electronics and communication devices both in the rail car and in control booths, power converters — such as , battery chargers and — are often installed to convert available DC or AC to the
     10 February 2017
  • Yahoo Finance
    Cree, Inc. , a market leader in LED lighting, today provided an update regarding its definitive agreement to sell its Wolfspeed Power and RF division , which ...
     8 February 2017
  • GlobeNewswire (press release)
    GlobeNewswire (press release) The expansion of Incap's production premises in Tumkur was completed in planned schedule and Incap celeated the opening of the new facilities on 18 ...Incap with new Indian manufacturing facilityevertiq.
     1 February 2017
  • EE Times
    , Part 2Alternative energy systems that can produce current spikes in the power generated by wind turbines, solar panels, and other sources as it's fed into batteries, , and other energy storage components. AC-powered devices, such as switch
     27 January 2017